Installation Instructions

1. Installation of 54" Commercial Wallcoverings Type I & Type II, Microvented and Non-Microvented  

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                                                       IMPORTANT – READ BEFORE PROCEEDING!

MOISTURE MOLD AND PERMEABILITY

Vinyl wallcovering can act as a vapor barrier and consequently should NOT be installed on walls that are susceptible to excessive condensation or moisture infiltration. This may be more likely to occur in Humid and Fringe Zone 1 climates.

To reduce the risk of fungal growth within the wall or wall cavity we strongly recommend the use of microvented, permeable wallcovering. The following conditions should be observed:

    *The building’s exterior envelope must be weather-tight, and the HVAC system must be operating before during and after installation.

    *The wall surface to be covered must be completely dry and free of any indications of prior mold/mildew growth before installation.

    *The wallcovering supplied by Len-Tex may be made permeable (minimum 8+ perms) by an optional microventing process. 

Permeable, microvented wallcovering cannot compensate for water intrusion caused by poor building envelope design, faulty construction, building system failure or improper maintenance practices.

CONFIRM THE PRODUCT

Before cutting this material, it is your responsibility to confirm the accuracy of the pattern, color and yardage; no returns will be allowed for cut material. You may confirm the wallcovering is microvented by holding in front of a bright light so the penetrations are visible.

PREPARE THE WALLCOVERING

Confirm that consecutive bolt (roll) numbers are being used and lot numbers are identical.  If transported during winter months the wallcovering must be allowed to warm to normal room temperature.  Recommended wall preparation (below) and ease of installation are best accomplished when the building temperature is 70 degrees prior to beginning work.

PREPARE THE WALL

All surfaces must be clean, dry, smooth and structurally sound. Existing wallcovering must be removed from the surface prior to installation. Sand-finish plaster must be scraped smooth.  Concrete block walls must be skim-coated  smooth before application of the wallcovering. Newly plastered walls must be completely dry before application – verify using a “moisture detector” making sure the walls are dry to the satisfaction of the architect. Any mold or mildew MUST be removed from the walls and they must be treated to inhibit further growth.  Refer to the EPA website for guidelines on cleaning and removing mold:  www.epa.gov--- these standards must be followed. Proper surface preparation is the key to getting great results. To prepare the surface properly, we recommend that you prime all surfaces with Roman Decorating ULTRA PLUS  ECO-988 (for microvented wallcovering and NSF/ANSI 342 compliance) or PRO-977. The wallcovering will be easier to hang and easier to remove at redecorating time. 

ADHESIVE APPLICATION – Wet Hang

Use Roman ECO-788 clay-based adhesive (for microvented  wallcovering and NSF/ANSI 342 compliance) or
PRO-774.  Follow manufacturer’s instructions for diluting adhesive with water.  Apply a liberal, even coating of adhesive over the entire back of the wallcovering by either using a pasting machine or by using a ½” nap application roller.  “Book” material for 15 minutes.

BEST PRACTICE:  Adequate booking time will help ensure a successful installation.

ADHESIVE APPLICATION – Dry Hang

Use Roman ECO-788 (for microvented wallcovering and NSF/ANSI 342 compliance) or PRO-774.  Roll ONLY FULL STRENGTH adhesive on the wall– DO NOT DILUTE! Apply an even liberal coat of adhesive using ½" nap application roller to no more than 3 drop sections of the wall. If performing a double cut, push-pin back loose top corner to avoid having the material fall.  At the point of double cut you will need to open seam area, reapply a light coat of adhesive in the seam area, (AKA: the Velcro technique), to avoid seaming issues.  Lightly work seam back together and follow the remainder of these instructions. For assistance with sourcing and/or using primers and adhesives, as well as technical questions, contact Roman Decorating Products at: 1-800-488-6117.

BEST PRACTICE Difficult installations, such as columns or outside corners, particularly with Type II wallcoverings, may be facilitated by applying adhesive to both the wall and the wallcovering, and allowing both surfaces to “tack-up” (the Velcro technique).  This will increase the wet tack of the adhesive to wrap corners or columns. Before installing, EXAMINE PATTERN FOR COLOR AND REPEAT IN DESIGN. Some patterns should be lined up, matched or alternately reversed depending upon color and texture in order to insure color uniformity. NOTE:This wallcovering must be installed in reverse roll number sequence. Hang first strip even with plumb line. Use strips in exact order as they are cut from the roll. Fill in over and around doors and windows as you come to them with strips cut in consecutive order from the roll. CUT AND INSTALL THREE(3) STRIPS ONLY . Then, inspect for color shading or pattern variation. If the appearance is not acceptable, stop hanging and contact your supplier.

MANUFACTURER  WILL NOT BE LIABLE FOR MATERIALS OR LABOR CHARGES  FROM INSTALLING MORE THAN THREE (3) STRIPS OF WALLCOVERING.

It is most important that  PERMANENT LIGHTING BE IN EXISTENCE PRIOR  TO  AND DURING INSTALLATION OF ALL WALLCOVERING.  DO NOT INSTALL WITH TEMPORARY “PIGTAIL” LIGHTING. 

SEAMING

Seaming of vinyl wallcoverings may be done in one of the following two methods:

The first and advised method is to overlap strips on the wall and cut through the overlap taking care not to score the drywall. Overlap the strips about 2 inches and using a straight edge and appropriate double cutter, cut down the middle of the double lapped thickness. Remove the top and bottom strips and work into a tight seam using a seam roller, or a  polyethylene or PVC smoothing blade.

The second method is to butt the material. This holds the cleaning to a minimum which is especially important when working with deep textures and dark color. The best butt seams require pretrimming with a straight edge on a cutting table.

NOTE:  Do not use steel blade knives for smoothing wallcovering or seams. Vinyl wallcovering surface is softer than steel blades and damage to wallcovering surface will occur. As each strip is installed, carefully wash excess adhesive from seams. Use a sponge dampened with clean, warm water, which has been changed frequently, and dry with a clean soft towel. Adhesive residue will discolor seams or leave a dull vertical area. If this occurs refer to FAQ section of the Len-Tex Corp. web site at www.lentexcorp.com for further cleaning procedures. Adhesive not cleaned promptly from surface of wallcovering will be very difficult to remove after it has dried – Piranha, DIF or similar products may help if this occurs. Taping seams with 2” masking tape before lapping and cutting will eliminate any potential problems with adhesive residue.Always carry wallcovering around corners approximately 6” making no outside corner cut. If a corner cutting is unavoidable, do not overlap and cut – butt each strip separately resulting in a tight corner seam. Trim excess material from base moldings, door and window frames with a suitable razor knife and cutting guide.

WARRANTY

Len-Tex wallcoverings come with a 5 year limited warranty. For full details of warranty coverage please refer to our website: www.lentexcorp.com  For a comprehensive understanding of mold occurrence and prevention please visit: www.wallcoverings.org or request from your distributor a copy of “Mold – Cause, Effect and Response”. 

 


2. Installation Instructions for Mylar Laminated Vinyl Wallcovering

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   See installation video here

                       

 

CONFIRM THE PRODUCT

Before cutting this material, it is your responsibility to confirm the accuracy of the pattern, color and yardage; no returns will be allowed for cut materiaL.

PREPARE THE WALLCOVERING

When applicable, confirm that consecutive bolt (roll) numbers are being used. To ensure a problem-free installation, the wallcovering and building temperature should be allowed to warm to an optimal 70 degrees F prior to beginning work.

PREPARE THE WALL

All surfaces must be structurally sound, clean, dry, and sanded smooth. A Gypsum Assn smoothness level of 4-5 is recommended for best results. Existing wallcovering must be removed from the surface prior to installation. Any presence of mold or mildew must be treated with a diluted bleach solution to inhibit further fungal growth. Newly plastered or floated walls must be completely dry before application – use of a “moisture detector” to confirm that any residual moisture does not exceed 4-5% is recommended.

*Please Note: Mylar-laminated wallcovering will accentuate imperfections on the wall; proper surface preparation is key to great results! To prepare the surface properly, we recommend sanding or floating the wall surface and priming with Roman Decorating PRO-977 Ultraprime or Zinsser Gardz. The wallcovering will be easier to hang and easier to remove for future redecorating. 

ADHESIVE APPLICATION - Wet Hang

Use Roman Decorating PRO 880 Ultra Clear Strippable adhesive, PRO-732 Extra Strength Clay adhesive or PRO-774 Clay Strippable for roller pasting or machine use. APPLY ONLY AT FULL STRENGTH – Whip or Stir DO NOT DILUTE!  Apply a liberal even coat of adhesive over the entire back of the wallcovering by either running strips through a pasting machine or with a 3/8” nap application roller. “Book” material for 10 minutes to ensure optimal adhesive tack, taking care not to crease the wallcovering. For additional adhesive assistance or sourcing call Roman at 708-891-0770.  TIP: Undiluted adhesive with proper booking time will help ensure a successful installation.   

ADHESIVE APPLICATION – Dry Hang

Use Roman Decorating PRO-732 Extra Strength Clay adhesive for roller pasting. APPLY ONLY AT FULL STRENGTH to wall– Whip or Stir DO NOT DILUTE! Apply an even liberal coat of adhesive using 3/8” nap application roller to no

more than 3 drop sections of the wall. If performing a double cut, push-pin back loose top corner to avoid having the material fall. At the point of double cut you will need to open seam area, reapply a light coat of adhesive in the seam area, (wet Velcro technique), to avoid seaming issues. Lightly work seam back together and follow the remainder of these instructions. For additional adhesive assistance or sourcing call Roman at 708-891-0770.

INSTALL THE WALLCOVERING

Before installing, EXAMINE PATTERN FOR COLOR AND REPEAT IN DESIGN.  Some patterns should be lined up, matched and/or alternately reversed depending upon color and texture in order to ensure color uniformity. Hang first strip even with plumb line. Use strips in exact order as they are cut from the roll. Fill in over and around doors and windows as you come to them with strips cut in consecutive order from the roll. CUT AND INSTALL THREE (3) STRIPS ONLY. After the first three (3) strips have been installed, inspect all for approval. If satisfactory, proceed with work. If not satisfactory stop work and contact your supplier.

IT IS MOST IMPORTANT THAT PERMANENT LIGHTING BE IN EXISTENCE PRIOR AND DURING INSTALLATION OF ALL WALLCOVERING.  DO NOT INSTALL WITH TEMPORARY or “PIGTAIL” LIGHTING.  Manufacturer accepts no responsibility for hanging of additional material.

SEAMING

Seaming of Mylar-laminated wallcoverings may be done in one of the following two methods:

The advised method is to overlap strips on the wall and cut through the overlap, taking care not to score the drywall. Overlap the strips about 2 inches and using a protected straight edge and appropriate double cutter, cut down the middle of the double lapped thickness. Use a fresh blade for each double cut. Remove the top and bottom strips and work into a tight seam using a WallWiz, polyethylene, or PVC smoothing blade. The second method is to butt the material. This keeps cleaning to a minimum, which is especially important when working with dark colors. The best butt seams require pretrimming with a protected straight edge on a cutting table. As each strip is installed, carefully wash excess adhesive from seams. Use a sponge dampened with clean, warm water, changed frequently, and dry with a clean soft towel. Adhesive residue will discolor seams or leave a dull vertical area. Adhesive not cleaned promptly from surface of wallcovering will be very difficult to remove.

CORNERS

We recommend cutting a seam at inside corners, to eliminate any wrinkles or creasing. For outside corners, always carry wallcovering around corners approximately 6” making no corner cut. If a corner cut is unavoidable, do not overlap and cut – butt each strip separately resulting in a tight corner seam. Trim excess material from base moldings, door and window frames with a suitable razor knife and cutting guide. For columns or outside corners, you may find that you need to apply adhesive to both the wall and the wallcovering; allow both surfaces to “tack-up” and wrap corners, columns, etc.

MOISTURE, MOLD AND PREMEABILITY

Mylar-laminated wallcovering can act as a vapor barrier and should NOT be installed on walls that are susceptible to excessive condensation or moisture infiltration. This may be more likely to occur in Humid and Fringe Zone 1 climates.

The following conditions should be observed:

·     The building’s exterior envelope must be weather-tight, and the HVAC system must be operating before and during installation.

·     The wall surface to be covered must be completely dry and free of any indications of prior mold/mildew growth before installation.

·     Mylar laminated wallcoverings cannot be microvented, as this will change the appearance of the wallcovering.

QUESTIONS OR PROBLEMS?

For additional assistance, please call the Len-Tex Quality Assurance Help Line at 800-224-7232.

Swatch colors may vary depending on monitor calibrations. Please order samples for accurate colors.
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