Application:

Wall Liner is recommended for lining over sand finish plaster, cement block, V-grooved paneling, and other problem walls to provide a smooth base on which to apply other wallcoverings. It is intended to be used as a lining for bridging cracks or other cavities, but it will not hide all wall imperfections, such as protrusions or misalignment of cement block.

Wall Preparation:

Acceptable hanging surfaces must be clean, thoroughly dry and structurally intact. All loose paint and other wallcoverings must be removed. Paneled walls should be washed to remove oils, wax or polish. Adhesion may be enhanced by scoring the surface with coarse sandpaper and priming with diluted adhesive. Concrete block and similar highly porous surfaces should also be sanded as smooth as possible first, and then sized with a diluted adhesive. Let dry for at least two (2) hours.

Use only a lead pencil for marking walls and the back of the Wall Liner. DO NOT use ballpoint pen or marking pen. Any mildew must be removed from walls and the surfaces treated to inhibit further mildew growth. Do not install unless there is a minimum temperature of at least 55°F in both the storage and installation areas.

Adhesive:

Roman Wallcovering Adhesive A-848-B premixed vinyl wallcovering adhesive is recommended for use in installing Wall Liner. Commercial equivalents can also be used. When used as a primer, the adhesive may be diluted with up to 1 quart of clean water for each gallon of adhesive.

Pasting and Hanging: Paste only one strip at a time.

Brush or roll the wall covering adhesive thoroughly over the back surface, especially on the edges. To carry material to the wall, fold the wet side to the wet side, but avoid creasing the material. Depending on the viscosity, a slight amount of moisture may come through the wall liner book-folding. This is acceptable. Align the first strip to a plumb line. Smooth any overlap onto the ceiling and baseboard. Smooth liner to the wall with a smoothing brush. Be sure to remove all air pockets. Butt or double-cut all seams. DO NOT OVERLAP. Setting seams with a seam roller will help prevent them from opening. You can use scissors or single edge razor blades to trim any excess at the baseboard, ceiling and around windows and doors.

Allow 24 hours to dry before further treatment.

Preparation of Goods:

Examine goods to assure that pattern, color, quantity and quality is as ordered. Separate goods by shade lot number and organize in roll number sequence, starting with highest number.

Preparation of Surface:

Surfaces to be covered must be clean, smooth, dry and structurally sound. Loose paint or other wallcoverings must be removed. To ensure maximum smoothness of installation, nail heads, nicks, gouges, and other surface imperfections should be sanded smooth and sealed. On new walls, dry wall joints should be taped, bedded and sanded smooth.

Walls should be checked with a suitable "moisture meter". Moisture content should not exceed four(4) percent. Remove any mildew from walls and treat surfaces to inhibit further mildew growth.

Vinyl Wallcoverings can be installed over almost any surface which has been properly prepared. Do not hang vinyl over ballpoint pen writing, wax crayon, ink marker, oil-based stains or any foreign matter that may bleed through the vinyl. It is suggested that lead pencil be used to mark vinyl or wall as pencil marks do not bleed.

Glossy surfaces should either be sanded to dull the surface or an application of Professional Vinyl Prep or Professional Heavy Duty Primer should be made.

On new drywall, if future strippability is desired and no primer is specified, use Professional Ultra-Prime Pro977 primer and Adhesive A-848-B. Some drywall joint compounds, contrast with the drywall paper surface, showing strong light and dark colored areas. Light colored, lightweight wallcoverings may allow show-through due to their limited amount of opacity. Should this situation occur, we recommend that you use Professional Ultra-Prime Pro977 primer then Heavy Duty A-848-B Adhesive.

Application of Wallcovering:

Before hanging, examine pattern for color uniformity and repeat in design. Some patterns should be registered or reversed, depending on texture and color, in order to ensure color uniformity. Follow instructions packaged with roll. Only full widths of material should be used for the most satisfactory installation. All material must be installed in roll sequence (numerical) within a shade lot starting with the highest number first and going in decreasing order, with each strip in sequence as cut from the roll.

For reversible patterns, every other strip of the wallcovering should be reversed (hang top to bottom and on the next stripe reverse bottom to top) to insure color uniformity.

Headers can cause unsatisfactory shading if hung out of sequence. The wallcovering is pre-trimmed and much of it can be butt-seamed. Overlapping and double-cutting and pre-trimming both have advantages in making acceptable seams. Do not "score" dry wall when double-cutting.

As with all vinyl wallcoverings, certain deeply embossed, non-design print patterns will provide a more satisfactory seam if a two to three inch selvage cut is taken from each side of the sheet. When hanging materials it is best to observe from a distance the first three sheets hung before continuing. This will indicate whether or not a deeper "cut-back" is in order.

Apply an even coat of adhesive to fabric side of material using a stiff bristle brush, roller or pasting machine in accordance with label recommendations. The wallcovering should be applied to the wall as soon as the adhesive has become tacky. Smooth surface, working out air bubbles as you go. As each strip is installed, immediately remove excess adhesive from wallcovering surface and seams using a natural sponge and a soft bristle brush frequently rinsed in clean warm water. Dry with clean toweling, professional vinyl cleaner/wallpaper remover should be used where adhesive has dried.

The following, or their equivalent, are the recommended adhesives for vinyl wallcovering:

• Roman PRO 880 Clear
• Roman PRO 732 Clay
• Gibson Holman (formerly Evans) - Dynamite 234 Clear
• Gibson Holman (formerly Evans) - Dynamite 111 Clay

Vertical joints should not occur less than 6" from outside and inside corners.

Do not install wallcoverings unless a temperature above 55°F is maintained in both areas of installation and storage. Permanent building lights should be available for installation.

Hanging Wallcovering Over Existing Wallcovering:

While we know that many customers hang over existing wallcovering, Wallhide does not recommend this practice. We suggest that the old wallcovering be removed first before installing new vinyl wallcovering. If a customer chooses to hang our wallcovering over existing wallcovering, there are adhesion-promoting primers such as Roman Adhesive's Professional R-35 that can be used to improve adhesion to the existing wallcovering.

Single layer installations typically have fewer problems with blisters and other installation defects than installations with multiple layers.

Hanging the wallcovering over existing wallcovering voids our Limited Warranty on the wallcovering.

Hanging Wallcovering Over Painted Wallcovering:

Wallhide does not recommend either painting over vinyl wallcovering or hanging additional layers of vinyl wallcovering over existing vinyl wallcovering.

If the customer chooses to hang over a painted wallcovering, the primary area of concern is to insure the paint on the existing wallcovering has adequate adhesion to the old wallcovering. Scratching the surface of the paint and doing a tape peel test should be done to test this adhesion. If the adhesion is satisfactory, the tape will not remove the paint from the existing wallcovering.

Assuming that the paint has adequate adhesion to the existing wallcovering, it should then be coated with an adhesion promoting primer such as Roman Professional R-35, following the manufacturer's instructions. After using an adhesion promoting primer, new wallcovering can then be hung with a conventional wallcovering adhesive.