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SECTION 09721

WALL COVERING PREPARATION AND ADHESIVES

** NOTE TO SPECIFIER ** Zinsser Brands / Rust-Oleum Corporation; wall covering preparation and adhesives.

This section is based on the products of Zinsser Brands / Rust-Oleum Corporation, which is located at:
11 Hawthorn Pkwy.
Vernon Hills, IL 60061
Toll Free Tel: 800-323-3584
Tel: 847-367-7700
Fax: 847-816-2330
Email: request info
Web: www.zinsser.com
[ Click Here ] for additional information.

Zinsser manufactures and markets a comprehensive line of high-performance problem-solving primers; wallcovering installation and removal products; interior wood finishes; exterior wood care products; concrete and masonry coatings; paint and cleaning products for the long-term prevention of mold and mildew; and low VOC, regulation-compliant coatings. Zinsser products are widely used in commercial, industrial and residential construction, property and institutional maintenance, and by quality-conscious property owners.

Zinsser products can be found virtually anywhere paint is sold. They can be found at more than 70,000 retail outlets across the US and internationally, including home centers, mass merchandisers, hardware stores, paint chains and independent paint and decorating retailers.

Zinsser is a division of the RPM Company, a world leader in specialty coatings and sealants, with headquarters located in Somerset, NJ and offices, manufacturing and distribution facilities throughout the United States, as well as in the UK and Australia.

This Finish Schedule is furnished only as a guide to select wallcovering installation systems, and is not all-inclusive of available Zinsser products. Although it is written in the CSI format and can be included in its entirety in a master specification, one should review the contents and edit to suit the particular needs of the project and its respective location.

Compliance with state and national VOC (Volatile Organic Compound) regulations are listed in the product description and should be taken into consideration. Because these regulations vary greatly around the country and are subject to change, we suggest you verify that products selected meet the requirements of the area in which they are to be used. If the project is located within the OTC, CARB, SCAQMD or other VOC regulated regions; one must comply with the regulations regarding VOC's. It is always recommended that you consult with a Zinsser Sales Representative or call Zinsser's Consumer Affairs Department at 732-469-8100 before finalizing the selection. Technical Data Bulletins and MSDS documents are available online at www.zinsser.com or by phone request.

Whatever your project - whatever your challenge. Zinsser's got you covered.

** NOTE TO SPECIFIER ** This specification covers removal of wallcovering, repair of damaged drywall and installation of commercial wallcovering. Included are specification of DIF Wallcovering Strippers, Gardz Damaged Surface Sealer, Shieldz Wallcovering Primers and SureGrip Wallcovering Adhesives. In addition to top of the line wallcovering primers and adhesives, this specification includes two innovative proven systems specifically developed to provide long-term protection against mold & mildew growth underneath wallcovering - The Zinsser Plus Mold & Mildew-Proof Commercial Wallcovering Installation System for all types of wallcovering and the Zinsser V.P. (Vapor Permeable) Commercial Wallcovering Installation System for applications of breathable wallcoverings where permeability of the decorative finish is a concern. Both systems are designed to prevent staining and loss of adhesion of wallcovering caused by mold & mildew growth under the wallcovering on the primer film and adhesive. The Systems also inhibit the growth of odor causing microbes under the wallcovering. The benefits of these systems are achieved through use of a mold and mildew-proof wallcovering primer and adhesive that is particularly resistant to mold and mildew growth. These products contain a mildewcide that prevents the growth of mold and mildew on the primer film and adhesive only.

The scope of this specification does not encompass or ensure compatibility with all wallcovering types. Before proceeding with installation, testing as outlined in section 1.5 Quality Assurance should be completed and approved by the person(s) responsible for final approval of the installation, otherwise known as the 'Responsible Party'.

PART 1

GENERAL

1.1

SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete items below not required for project.

Removal of existing wallcovering and wall repair.

Surface preparation and priming of wall surfaces for scheduled wall coverings.

Installation of wall coverings.

1.2

RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

Section 09260 - Gypsum Board Assemblies: Surface preparation of gypsum board.

1.3

REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.

American Society for Testing and Materials (ASTM) D16 - Standard Terminology for Paint, Related Coatings, Materials and Applications.

American Society for Testing and Materials ASTM D3273 - Accelerated Environmental Chamber Testing for Interior Coatings.

American Society for Testing and Materials ASTM D5590 - Determining the Resistance of Paint Films and Related Coatings to Fungal Defacement by Accelerating Four Week Agar Plate Assay.

American Society for Testing and Materials ASTM G21 - Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi.

GreenSeal GS-11 - Paints.

GreenSeal GS-36 - Adhesives, Sealants & Sealant Primers.

OTC-Regulation No. 41 - Ozone Transport Commission.

SCAQMD Rule 1113 - Architectural Coatings.

SCAQMD Rule 1168 - Adhesives & Sealants.

EPA-Method 24 - Determination of volatile matter content, water content, density, volume solids, and weight solids of surface coatings.

1.4

DEFINITIONS

Microvented - wallcovering that has been perforated with micro openings to allow moisture to escape.

Non-Woven - a fabric backing formed by laying a continuous web of random spaced fibers chemically bound together to create a uniform batting.

Water Vapor Permeablity (WVP) - the ability of water vapor to pass through a material. The degree of "WVP" of a wall decor system depends on the degree of permeability of the drywall, wallcovering material, primer and adhesive used to install it.

Mold and mildew - is used synonymously for the more scientific term 'fungus' and refers specifically to fungal organisms and not to stains or discolorations that they may cause.

Mold - is used synonymously with mold and mildew.

Mold and mildew stain - stains or discoloration caused by fungi under the wallcovering that are visible without removing the wallcovering.

Loss of adhesion - the wallcovering becomes detached from the substrate. This type of failure can generally be described as peeling, lifting, curling or bubbling and is the direct result of mold destroying the cohesive properties of the adhesive or primer.

1.5

SUBMITTALS

Submit under provisions of Section 01300.

Product Data: For each material indicated, including:

Material List: An inclusive list of required materials.

Preparation instructions and recommendations.

Manufacturer's Information: Manufacturer's technical information, including label analysis and instructions for handling, storing, and applying each material.

1.6

QUALITY ASSURANCE

Installer Qualifications: A firm or individual experienced in applying paints and wall coverings similar in material, design, and extent to those indicated for this Project, whose work has resulted in applications with a record of successful in-service performance.

** NOTE TO SPECIFIER ** Include a mock-up or field sample if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up or field sample on a large project might be specified. When deciding on the extent of the mock-up or field sample, consider all the major different types of work on the project.

Mock-Up/Field Sample: Provide a mock-up or field sample panel for evaluation of surface preparation techniques and application workmanship.

Finish surfaces for verification of products, colors and patterns.

Finish area designated by Architect.

Install 3 full-width panels of each wallcovering pattern specified in area designated by Architect leaving a section of primed surface uncovered for inspection.

Wallcovering should be allowed to bond to substrate at least three days before inspecting. Note that adhesive generally will not fully cure behind most vinyl wallcoverings for 30 to 60 days.

Do not proceed with remaining work until the Architect approves the mock-up or field sample panel(s).

If a problem occurs, stop and contact your local Zinsser product source or Zinsser sales representative and wallcovering manufacturer's representative. Proceeding beyond this point will be done at the Responsible Parties', Contractor's and Installer's risk and will absolve ZINSSER Co., Inc., the product distributor and the wallcovering manufacturer of all responsibility.

When approved, the mock-up or field sample panel area(s) will be deemed incorporated into the Work and will serve as the standards by which the subsequent Work of this Section will be judged.

1.7

DELIVERY, STORAGE, AND HANDLING

Deliver materials to Project site in manufacturer's original, unopened packages and containers bearing manufacturer's name and label:

Store materials in an area that is within the acceptable temperature range, per manufacturer's instructions. Protect from freezing.

Handling: Maintain a clean, dry storage area, to prevent contamination or damage to the coatings.

Store materials not in use in tightly covered containers in a well-ventilated area at a minimum ambient temperature of 45 deg F (7 deg C).

Maintain storage containers in a clean condition, free of foreign materials and residue.

1.8

PROJECT CONDITIONS

Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

Gauge the surface moisture before applying skim coatings and primer coatings:

Test multiple areas using a moisture meter in order to get a representative sample.

Moisture Meter Test Procedure:

Measure the moisture level of both the drywall surface and of the drywall sub-surface using a Delmhorst Moisture Meter D2100 equipped with # 2941/A-100 5/16 inch (8 mm) Contact Pins. Multiple readings should be taken at multiple sites to obtain a representative sample of the total surface to be primed. Record location and reading.

Surface moistureThe surface moisture should be 2 percent or less before applying the primer. Determine the surface moisture by pressing the pins into but not through the facing paper on the drywall.

Sub-surface moistureThe moisture level of the gypsum core is not as immediately critical as the surface moisture in order to apply the primer. Determine the sub-surface moisture by pushing the pins fully into the drywall. The gypsum must be sufficiently dry to maintain structural integrity and not be greater than 4 percent.

** NOTE TO SPECIFIER** If remediation of a site for mold & mildew is required prior to installation of new wallcovering, refer to procedures recommended by Zinsser Co., Inc. on www.zinsser.com in Zinsser Plus Mold & Mildew-Proof Commercial Wallcovering Installation Warranty Guidelines for information on site preparation, work requirements, etc.

Follow mold & mildew remediation guidelines according to the Zinsser Plus specifications www.zinsser.com.

** NOTE TO SPECIFIER ** Mold and mildew-proof wallcovering installation systems warranty provisions Delete if products not required.

1.9

WARRANTY

** NOTE TO SPECIFIER ** The Zinsser Plus Mold & Mildew-Proof™ Commercial Wallcovering Installation System and the Zinsser V.P. (Vapor Permeable™) Commercial Wallcovering Installation System are guaranteed for 5 years from the date of application to provide protection from mold and mildew on the dried primer film and adhesive when applied according to Warranty Guidelines provided by ZINSSER on www.zinsser.com. To receive a Warranty, this project must be registered and Warranty procedures must be followed. ALL bidding contractors must be provided a complete copy of product Warranty Guidelines, which includes surface preparation prerequisites, material and application requirements and information on required project inspections and submittals. Delete if 5-year written warranty is not required.

Perform work and submit manufacturer's required job registration and verification forms in accordance with Zinsser's Mold & Mildew-Proof Warranty Guidelines provided by Zinsser on www.zinsser.com. Provide manufacturer's 5-year Mold & Mildew-Proof Guarantee on the following coating products:

Zinsser Plus Mold & Mildew-Proof Commercial Wallcovering System

Zinsser V.P. (Vapor Permeable) Mold & Mildew-Proof Commercial Wallcovering System

** NOTE TO SPECIFIER ** Extra materials may not be allowed for publicly funded projects. Delete if not required.

1.10

EXTRA MATERIALS

Furnish extra materials from the same production run as the materials applied and in the quantities described below. Deliver extra materials to Owner.

Quantity: Furnish Owner with an additional three percent as appropriate of each material applied.

PART 2

PRODUCTS

2.1

MANUFACTURERS

Acceptable Manufacturer: Zinsser Brands / Rust-Oleum Corporation, which is located at: 11 Hawthorn Pkwy. ; Vernon Hills, IL 60061; Toll Free Tel: 800-323-3584; Tel: 847-367-7700; Fax: 847-816-2330; Email: request info; Web: www.zinsser.com

Substitutions: Not permitted.

2.2

SURFACE PREPARATION

** NOTE TO SPECIFIER ** Delete if not required.

Wall Covering Removers:

** NOTE TO SPECIFIER ** DIF® Concentrate LIQUID Wallpaper Stripper is a patented wallcovering removal solution that contains a blend of effective wetting agents and enzymes that quickly break down the paste behind the wallcovering. DIF CONCENTRATE can be used to strip most types of old wallpaper and residual adhesives that remain on the wall after old wallcoverings is peeled or dry-stripped from the walls. These include: traditional paper wallpapers, vinyl coated papers, solid vinyl wallcovering, foils, mylars, grasscloth, textiles and even painted wallpapers. Delete if not required.

CONCENTRATE Liquid Wallpaper Stripper: DIF - Wallpaper Stripper Liquid Concentrate

** NOTE TO SPECIFIER ** DIF® GEL Ready-to-Use Wallpaper Stripper is a non-drip, enzyme-based, blue GEL that clings to walls and eliminates the mess of watery solutions or steamers. DIF GEL can be used to strip most types of old wallpaper and residual adhesives that remain on the wall after old wallcoverings is peeled or dry-stripped from the walls. These include: traditional paper wallpapers, vinyl coated papers, solid vinyl wallcovering, foils, mylars, grasscloth, textiles and even painted wallpapers. Delete if not required.

GEL Ready-to-Use Wallpaper Stripper: DIF GEL - Wallpaper Stripper.

DIF® FAST-ACTING Ready-To-Use LIQUID Wallpaper Stripper is powerful enough for the most demanding wallpaper removal jobs- yet it is safe, non-toxic and easy to use! This exclusive non-drip liquid clings to walls and stays wet longer than other liquid removerseliminating the need for rewetting and the mess associated with liquid removers. DIF FAST-ACTING can be used to strip most types of old wallpaper and residual adhesives that remain on the wall after old wallcovering is peeled or dry-stripped from the walls. These include: traditional paper wallpapers, vinyl coated papers, solid vinyl wallcovering, foils, mylars, grasscloth, textiles and even painted wallpapers. Delete if not required.

FAST-ACTING Ready-to-Use Wallpaper Strippers: DIF FAST-ACTING - Wallpaper Stripper.

Damaged Surface Sealer:

** NOTE TO SPECIFIER ** Interior water-base sealer for problem surfaces recommended for sealing damaged (bubbled) drywall, residual wallcovering glue, builder's flat paint, skim coats and spackling, and other problem porous surfaces such as plaster, cement and cementitious coatings, calcimine, stucco, acoustic and texture finishes, uncoated wallpaper, etc. Meets AIM, CARB SCM, OTC SCM, and SCAQMD standards for Specialty Primer, Sealer, and Undercoaters. GARDZ has a milky-blue color that helps to determine where it has been applied but dries water clear. It is formulated for use directly from the container; tinting is not recommended.
Delete if not required.

Damaged Surface Sealer: GARDZ High Performance Sealer (100 g/L VOC).

2.3

SUBSTRATE PRIMER/SEALERS

** NOTE TO SPECIFIER ** SHIELDZ UNIVERSAL is a white hiding, acrylic latex wallcovering primer recommended for application to interior walls, ceilings, and related surfaces prior to installing wallcovering. Allows easier adjusting and positioning of wallpaper, prevents seam separation, curling edges, bubbles and makes removal easy without damage to walls when its time to redecorate. Hides, primes, seals, and sizes in one coat. . Ideal for use over bare or previously painted gypsum wallboard (drywall) and cured plaster, wood paneling; ceramic tile; glass; plastic laminate; and existing non-porous wallcoverings. Delete if not required.

Pigmented Universal Wallcovering Primer: Shieldz Universal - (100 VOC g/L)

** NOTE TO SPECIFIER ** SHIELDZ® CLEAR WALL SIZE/SEALER is a clear, acrylic, latex wallcovering primer/sealer/sizing. It prepares surfaces for hanging all wallcovering and promotes better adhesion. Dries clear. Can be tinted to dark colors for use behind dark wallcoverings. Recommended for application to interior walls and ceilings prior to installing wallcovering where a pigmented, hiding primer is not required. Ideal for use over previously painted gypsum wallboard (drywall) and cured plaster, wood paneling; ceramic tile; glass; plastic laminate; and existing non-porous wallcoverings. Delete if not required.

Clear Wallcovering Primer: Shieldz Clear Wall Size - (100 VOC g/L).

** NOTE TO SPECIFIER ** Exclusive mold and mildew-proof, white, acrylic, latex, two-coat primer developed for use to prepare walls prior to installation of wallcoverings in demanding humid environments. Uniquely formulated with advanced proprietary resin systems and EPA-registered mildewcides, with best overall rating in ASTM D5590 and D3273 mold and mildew resistance testing.
Provides unsurpassed protection against the most common problems associated with mold & mildew growth under wallcovering. Protects against adhesion loss, buckling, curling seams and edges, unsightly mold & mildew stains and the musty odor associated with mold & mildew growth under wallcovering. Extends lifespan of wall surfaces and wallcoverings. Prevents drywall damage when redecorating.
Recommended for use in hotels, motels, healthcare facilities and other commercial properties to prepare virtually any existing, remodeled or new construction surface for wallcovering where mold and mildew is a concern. Can be used over previously painted or wallcovered walls or where permeability is unknown. Meets AIM, CARB SCM, OTC SCM and SCAQMD standards for primers, sealers and undercoaters.
Specify with SureGrip Plus Mold & Mildew-Proof Commercial Wallcovering Adhesive according to warranty guidelines provided by ZINSSER on www.zinsser.com and for the specific project to receive Zinsser's written 5-year Mold & Mildew-Proof Wallcovering Guarantee. Delete if not required.

Mold & Mildew-Proof Primer: Shieldz Plus Mold & Mildew-Proof Commercial Wallcovering Primer (100 VOC g/L).

** NOTE TO SPECIFIER ** State-of-the-art permeable, mold & mildew-proof, white, acrylic, latex, one coat, high-build, high-hide wallcovering primer for use to prepare walls prior to installation of breathable wallcoverings. Uniquely formulated with advanced proprietary resin systems and EPA-registered mildewcides, with best overall rating in ASTM D5590 and D3273 mold and mildew resistance testing.
Provides unsurpassed protection against the most common problems associated with mold & mildew growth under wallcovering. Protects against adhesion loss, buckling, curling seams and edges, unsightly mold & mildew stains and the musty odor associated with mold & mildew growth under wallcovering. Extends lifespan of wall surfaces and wallcoverings. Prevents drywall damage when redecorating.
Recommended for new construction or renovations where permeable drywall and wallcovering is used. Ideal for interior walls facing exterior surfaces. Meets AIM, CARB SCM, OTC SCM, SCAQMD, and GS-11 standards for primers, sealers and undercoaters.
Specify with SureGrip V.P. Commercial Wallcovering Adhesive according to warranty guidlelines provided by ZINSSER on www.zinsser.com and for the specific project to receive Zinsser's written 5-year Mold & Mildew-Proof Wallcovering Guarantee. Delete if not required. Recommended Uses - Ideal for new construction or renovations where permeable drywall & wallcovering is used. Delete if not required.

Vapor Permeable, Mold & Mildew-Proof Primer: Zinsser V.P. (Vapor Permeable) Commercial Mold & Mildew-Proof Wallcovering Primer: (< 50 VOC g/L).

** NOTE TO SPECIFIER ** Interior water-base clear sealer for problem surfaces. Recommended for sealing damaged (bubbled) drywall, residual wallcovering glue, builder's flat paint, skim coats and spackling, and other problem porous surfaces such as plaster, cement and cementitious coatings, calcimine, stucco, acoustic and texture finishes, uncoated wallpaper, etc. Meets AIM, CARB SCM, OTC SCM, SCAQMD and GS-11 standards for Specialty Primer, Sealer, and Undercoaters. GARDZ has a milky-blue color that helps to determine where it has been applied but dries water clear. It is formulated for use directly from the container; tinting is not recommended.
Delete if not required.

High Performance Sealer: GARDZ High Performance Sealer (100 VOC g/L).

2.4

WALL COVERING INSTALLATION ADHESIVE PRODUCTS

** NOTE TO SPECIFIER ** Refer to technical data bulletin for detailed recommendations for compatibility of adhesives with specific wallcovering types.

Adhesive Products:

** NOTE TO SPECIFIER ** Exclusive clay-based, strippable, low moisture, commercial grade wallcovering adhesive for installing medium to heavyweight vinyl (up to 40 oz. commercial grade types I, II and III) and special moisture-sensitive wallcoverings such as flexible wood and foil that tend to curl and bubble. Uniquely formulated with a special no water addition formula that flows easily through pasting machines without the need to contaminate and weaken with water. It provides superior wet tack for easy positioning of heavy materials and excellent dry adhesion. Stirs, whips or shakes to desired consistency. Cleans up with little effort. High solids formula allows one gallon to cover 300 square feet, up to 30 percent more than other brands. Delete if not required.

Clay Strippable Adhesive: SureGrip 134 Clay Strippable Wallcovering Adhesive (<10 VOC g/L).

** NOTE TO SPECIFIER ** An extra strength, clay-based, commercial grade wallcovering adhesive for hanging hard-to-stick materials and moisture-sensitive materials such as flexible wood, bridging liner, cork and foil. Use for installing medium to heavyweight vinyl (up to 40 oz. commercial grade types I, II and III). SureGrip 138 offers highest initial wet tack to make positioning of heaviest materials easier, and cures to a strong final bond. Spreads easily and flows easily with pasting machines without the need to add water. Stirs, whips or shakes to desired consistency. Cleans with little effort. Delete if not required.

Heavy Duty Clay Adhesive: SureGrip 138 Heavy Duty Clay Non-Strippable Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER** This general purpose, heavy duty, clear, strippable commercial grade wallcovering adhesive offers exceptional performance & versatility preferred by the pros. Ideal for standard vinyl installations and use with all types of lightweight wallpaper (up to 34 oz. commercial grade types I and II). Special no-dilution formula can be whipped, stirred or shaken to thin for use in a paste machine. Non-staining. High solids formula allows one gallon to cover 300 square feet, up to 30 percent more than other brands. Delete if not required.

Heavy Duty Clear Strippable Adhesive: SureGrip 122 Heavy Duty Clear Strippable Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER ** This premium heavy duty, clear, strippable commercial grade wallcovering adhesive combines the best features of clear and clay adhesives for hanging all types of wallcovering - from heavyweight woven and non-woven fabric-backed vinyl (up to 40 oz. commercial grade types I, II and III) to delicate or special coverings such as silk, suede, grasscloth, string, fabric and foil. Made with unique no-dilution formula, SureGrip 128 provides superior wet tack and slip for easy positioning of very heavy wallcovering, extended open time for trouble-free double-cutting, and spreads & flows easily in a paste machine without the need to add water. Stirs, whips or shakes to desired consistency. Non-staining. Delete if not required.

Premium Heavy Duty Clear Adhesive: SureGrip 128 Premium Heavy Duty Clear Strippable Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER ** High bond, vinyl-bonding, commercial grade adhesive is formulated for hanging vinyl wallcovering, foil and borders over existing vinyl wallcovering or other non-porous or difficult surfaces such as paneling, textures, concrete, stucco, metal and plastic without the need to prime. It is extremely resistant to high humidity. Dries clear. Delete if not required.

Vinyl Over Vinyl Adhesive: SureGrip 127 Vinyl over Vinyl Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER ** A paste activator for use on pre-pasted wallpaper & borders. Provides added adhesion. Delete if not required.

Pre-Pasted Wallcovering Adhesive: SureGrip 120 Pre-Pasted Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER** This exclusive, high performance Mold & Mildew-Proof™*, heavy duty, clear, strippable wallcovering adhesive protects wallcovering from damage caused by mold and mildew growing on the adhesive. Ideal for use in humid environments with all types and weights of wallcoverings - from lightweight to heavyweight commercial vinyl (up to 40 oz. types I, II and III) to special coverings such as silk, suede, string, fabric and foil. Non-staining.
Provides unsurpassed protection against the most common problems associated with mold & mildew growth under wallcovering. Protects against adhesion loss, buckling, curling seams and edges, unsightly mold & mildew stains and the musty odor associated with mold & mildew growth under wallcovering.
Recommended for use in hotels, motels, healthcare facilities and other commercial properties to prepare virtually any existing, remodeled or new construction surface for wallcovering where mold and mildew is a concern. Can be used over previously painted or wallcovered walls or where permeability is unknown. Meets AIM, CARB SCM, OTC SCM, SCAQMD and GS-36 standards for adhesives and sealants.
Specify with Shieldz Plus Mold & Mildew-Proof Commercial Wallcovering Primer according to warranty guidelines provided by ZINSSER on www.zinsser.com and for the specific project to receive Zinsser's written 5-year Mold & Mildew-Proof Wallcovering Guarantee. Delete if not required.

Mold & Mildew-Proof Adhesive: SureGrip Plus Mold & Mildew-Proof Commercial Wallcovering Adhesive (<10 VOC g/L)

** NOTE TO SPECIFIER ** State-of-the-art breathable, mold & mildew-proof, heavy duty, clear, strippable wallcovering adhesive helps eliminate buildup of condensation behind wallcovering and potential for mold and mildew growth on the adhesive*. Developed for hanging all types of permeable, micro-vented and non-woven commercial wallcoverings (up to 34 oz. types I, II and III). Provides excellent adhesion in the most challenging humid environments. Special no-dilution formula for use in a paste machine eliminates the need to add water that can contaminate paste. Non-staining. Provides unsurpassed protection against the most common problems associated with mold & mildew growth under wallcovering. Protects against adhesion loss, buckling, curling seams and edges, unsightly mold & mildew stains and the musty odor associated with mold & mildew growth under wallcovering.
Recommended for use in hotels, motels, healthcare facilities and other commercial properties where permeable drywall and wallcovering is used. Ideal for wallcoverings applied to interior walls facing exterior surfaces. Meets AIM, CARB SCM, OTC SCM, SCAQMD and GS-36 standards for adhesives and sealants.
Specify with SureGrip V.P. Commercial Wallcovering Primer according to warranty guidelines provided by ZINSSER on www.zinsser.com and for the specific project to receive Zinsser's written 5-year Mold & Mildew-Proof Wallcovering Guarantee. Delete if not required.

Vapor Permeable, Mold & Mildew-Proof Adhesive: SureGrip V.P. (Vapor Permeable) Commercial Wallcovering Adhesive (<10 VOC g/L)

PART 3

EXECUTION

3.1

PREPARATION

General: Protect carpeting, floors, furniture and adjacent areas. Remove hardware and hardware accessories, plates, machined surfaces, lighting fixtures, and similar items already installed. If removal is impractical or impossible because of size or weight of the item, provide surface-applied protection before surface preparation and wall covering.

3.2

WALLCOVERING REMOVAL

General: Apply products according to manufacturer's written instructions. Use applicators and techniques best suited for substrate and type of material being removed.

** NOTE TO SPECIFIER ** Wallpaper Stripper functions much like paint remover, i.e. it must penetrate the wallpaper and loosen the adhesive. Reaction time will vary depending on the type of wallpaper being removed as well as the type of adhesive used. Most wallpaper will be ready for removal 2 - 10 minutes after product has been applied. Some types of wallpaper may take longer.

Wetting Period: Test wall covering with remover/stripper product to determine effective wetting time. If wallcovering is vinyl it will be necessary to score wallcoveing before applying remover/stripper.

Wall Covering Removal: Remove loosened wall covering, backing and adhesive. Reapply product for areas that resist easy removal without damaging substrate.

Adhesive Removal: Remove loosened adhesive. Reapply product for areas that resist easy removal without damaging substrate.

Surface Cleaning:

After wallpaper has been removed apply a thin coating of the product to walls to remove any remaining adhesive. After 10 minutes rinse the surfaces and adjoining areas thoroughly with water. Verify that all of the solution is removed. Change rinse water frequently to avoid recontamination of the walls.

When mildew is present or likely, use a household mildew cleaner to destroy any mildew that may be present. Rinse walls and allow to dry before priming for scheduled wall covering.

Sand glossy surfaces. Seal marks which may bleed.

Stains: Apply an appropriate stain killing primer such as Zinsser's B-I-N, Bulls Eye 1-2-3, or Cover-Stain to prevent stains from bleeding into the wallcovering.

Peeling Paint: Any existing coatings that are not soundly adhered should be removed by the best available means, usually sanding and/or scraping.

Sand loose, peeling facing paper. Tear open bubbles in the drywall facing paper and tear off loose facing paper until only firmly attached paper remains. (Bubbles may be most apparent when the surface is wet.) Replace sections of drywall where the gypsum core is deteriorated, loose or crumbling. Prior to skim coating damaged areas, use GARDZ® High Performace Sealer to seal down damaged drywall facing paper. Patch with appropriate patching material. After dried skim coats have been sanded, re-apply GARDZ to seal skim coats and reduce potential for out-gassing) Patching materials must be dry and fully cured before sealing.

3.3

SURFACE PRIMER/SEALER INSTALLATION

** NOTE TO SPECIFIER ** Delete if not required.

Install wall liner where required by wall covering manufacturer to correct surface defects that would telegraph through the wall covering. Form smooth wrinkle-free surface for finished installation.

Fill paneling grooves, nail holes, gouges, and other surface damage with interior spackling compound prior to priming.

** NOTE TO SPECIFIER ** Metallic inks - Certain types of existing wallcovering may have patterns printed with metallic-based inks that will bleed through most water-base coatings. To prevent bleed through prime these wallcoverings with B-I-N by Zinsser and allow to dry for 2 hours before applying SHIELDZ UNIVERSAL.

Gypsum Wallboard: Remove sanding dust. On drywall that has been skim coated with drywall mud or spackling compound apply two coats of primer/sealer allowing 2 hours between coats. Commercial vinyl wallcovering may require two coats for complete protection of substrate.

3.4

WALL COVERING INSTALLATION

Measure moisture content of surfaces using an electronic moisture meter. Do not apply coverings unless moisture content of surfaces are below the following maximums:

Plaster and Gypsum Wallboard: 12 percent.

Comply with wallcovering manufacturers' written installation instructions applicable to products and applications.

Apply adhesive, and vinyl wall covering per manufacturer's instructions.

Use wall covering in roll number sequence.

Razor trim edges on flat work table. Do not razor cut on gypsum board surfaces.

Apply wall covering smooth, without wrinkles, gaps or overlaps. Eliminate air pockets and ensure full bond to substrate surface. Butt edges tight.

Horizontal seams are not acceptable.

Do not seam within 2 inches of internal corners or within 6 inches of external corners.

Install wall covering before installation of bases, cabinets, hardware, or items attached to or spaced slightly from wall surface. Do not install wallcovering more than 1/4 inch below top of resilient base.

Where wallcovering extends into door frame reveals, or metal wallboard or plaster stops, apply wall covering with contact adhesive within 6 inches of wallcovering termination. Ensure full contact bond.

Remove excess wet adhesive from seam before proceeding to next wallcovering sheet. Wipe clean with dry cloth.

3.5

CLEANING

Clean wall coverings in accordance with manufacturer's recommendations, including removal of excess adhesive, dust, dirt, and other contaminants.

Replace wall plates and accessories removed prior to Work of this Section.

END OF SECTION