You are about to receive your new wallpaper..here are some important preparation tips before getting started with installation.
There are two reasons to prepare your walls before installing your wallpaper. The first is to make sure your wallpaper will adhere properly to the wall, and the second is to make future removal easy. Wallpaper dries normally over 24 to 48 hours. There is however a significant amount of adhesion and suction as the paper contracts as it dries. If the wallpaper has not formed a good adhesion it will pull away from the wall. In addition, when the paper is removed later, it can damage the coating of the underlying surface. Proper preparation will ensure the best results from your wall covering.
The first step is to repair the defects of the wall surface. With gypsum walls, dents, nail holes, etc., must be filled with patching plaster. After the appropriate drying time for the type of plaster you are using, the repaired areas should be sanded to leave a smooth, non-porous surface as well as level. As the plaster dries, it shrinks slightly. After about 30 minutes you should return to the repaired area to fill in any cracks and bumps that have formed during drying. Larger defects should be reinforced with joint tape. The crack should be cleaned and moistened with water and a clean cloth before making the final repair. Fill the crack again with plaster and place the joint tape over the crack in a vertical direction. Now you have to spread the joint tape with a thin layer of plaster, then gently smooth the plaster using the spatula over the tape. When the area is dry, you can sand the repair with very fine sand paper.
Once your walls have been repaired, they should be cleaned of any sanding residue, grease, or obvious stains. Stains can be treated on site with an anti-stain primer (eg: BIN or Other) if necessary. All moldy areas should be treated with a bleach solution before applying any primer to kill bacteria. Particularly difficult stains may require the use of an oil-based primer. It is normally recommended to cover these treated areas with a coat of acrylic primer.
Preparation for wallpaper
Proffesional wallpaper installers have used different products with exceptional results other than those listed. These guidelines were developed as a starting point for the 'DIY' person or owner (do it yourself) and are considered the best way as to what type of product will meet your needs. This information is based on subjective and collective information from several wallcovering professionals who belong to PaperNet and other professional forums and may not be suitable for your particular application. It is imperative that you fully understand all safety precautions when handling these products and always follow the manufacturer's instructions. You should also follow all of the wallpaper and adhesive manufacturer's instructions for what type of surface preparations are needed for effective adhesion. If you have any questions, please do not hesitate to contact us by email or phone.
On drywall (painted with latex), use an acrylic or oil primer.
On drywall (painted with builder's paint), use an acrylic primer / sealer.
On new plaster (after proper curing time) use an acrylic primer / sealer specifically formulated to seal porous surfaces (eg Roman Pro 999 - RX35 etc.) to prepare the surface.
On old plaster (painted with latex or oil), use a coat of acrylic primer.
On any type of wall with suspected defects/damage, use a primer / sealer.
On any type of wall with stains/mold problems, use an anti-stain primer (ex: BIN etc). The mold should first be treated with a bleach solution.
On new or repaired gypsum walls, use an acrylic primer / sealer.
On a wall surface with residual wallpaper paste use a primer / sealer.
On decorative borders applied to a painted surface refer to the type of wall mentioned above.
On old wallpaper, you should first make every effort to remove the old wallpaper. If your wallcovering is vinyl coated, sand any blemishes and rough areas, then apply a primer or primer / sealer.
Drywall: Also known as sheetrock, wallboard, or gypboard. The largest amount of gypsum rock used in the world is used for the walls of houses. The Drywall is made by sandwiching a mass of wet plaster between two sheets of thick paper. When the mass sets and is dried, the result becomes a strong, rigid and fire resistant building material. It is fire resistant because in its natural state, gypsum contains water, and when exposed to heat or flame, this water is released as vapor, retarding heat transfer. The sheets of Drywall are simply cut, glued together, nailed to the wall studs. Then all joints and screw holes are finished with joint compound creating a smooth uniform appearance.
Plaster walls: Before 1900, lime-based plaster was used. It has been mixed with animal hair and sand to give it stability and strength. After 1900, a gypsum based on plaster was used. A three-layer system was used in both cases. First a layer of scraping, which has been pressed into the batten to form the main elements of the plaster to hold it in place. Lath boards are the series of boards nailed to the wall frame spaced 1/4 "apart. This distance allows the scraping layer to fill in the holes and anchor the plaster in place. This is followed by what is called the brown layer which is the first step in creating a level surface. The topcoat is applied under pressure until the surface is mirror smooth. The board is usually made of wood, although they may be metal in commercial applications due to the increased fire resistance. In the 1950s the 'button board' which is a 3/4 '' thick material similar to a sheet of drywall with many holes was also often used. Only two coats of plaster are applied to the "button board". The last type of plaster is a "blueboard" plaster. It's a drywall with a blue paper. Drywall is installed as usual, and a thin layer of plaster is applied to the entire surface. Only two coats of plaster are applied to the "button board". The last type of plaster is a "blueboard" plaster. It's a drywall with a blue paper. Drywall is installed as usual, and a thin layer of plaster is applied to the entire surface. Only two coats of plaster are applied to the "button board". The last type of plaster is a "blueboard" plaster. It's a drywall with a blue paper. Drywall is installed as usual, and a thin layer of plaster is applied to the entire surface.
How to know or see the difference: The easiest way is to remove an electrical outlet cover. If the wall is more than 5/8 "thick, it is plaster. Most modern homes are built with Gypsum, but there are exceptions.
Primers: Most primers are applied to make the substrate more uniform for acceptance of the topcoat. They also improve the adhesion of the topcoat. The primers do not allow the wallpaper to slip easily during the installation process unfortunately. On the other hand, they will facilitate the removal of the wallpaper and reduce the risk of damage to the wall. These can be water-based (acrylic) or oil-based. All paint companies make primers.
Primers / Sealer: Also known as DRC, the repair of clear (uncolored) gypsum walls. This product can provide the best assurance for proper installation. This is a special penetrating primer that is designed to penetrate the wall surface and seal any problem areas due to surface damage or any situation where wall surface abnormalities are suspected. These products are available in several blends to meet specific needs. A colored (pigmented) acrylic primer / sealer is the most common because it can be used on all surfaces.
It is water based, easy to clean and the coloring helps prevent any discoloration from showing through the paper.
These products protect the underlying gypsum, provide a good surface for adhesion and increase wallpaper slippage. Examples of primer / sealers are Draw-Tite from Scotch Paint, Gardz from Zinsser, Liquid Drywall from Roman and PrepRite Drywall Conditioner from Sherwin Williams.
Prep coat: Acrylic primers which normally, when dry, leave a tacky surface. This surface allows wall coverings to easily adhere to the surface. Sometimes called primer / size. Examples of prep products are RX-35 from Roman, Z-54 from Zinsser, BITE from Golden Harvest, Adhesium from Muralo, Prep Tack from Duron and Wall-Grip from Benjamin Moore.
Anti-stain primers: should be used for walls with problematic stains like grease, recurring mold, etc. They prevent these types of stains from penetrating through the wallpaper. This product would be used for the local treatment of these areas or as a total primer base. These primers are also excellent for covering brightly painted surfaces that might otherwise also penetrate through the final wall covering. Most anti-stain formulas contain antimicrobial agents to prevent future growth of any type of mold. However, existing mildew should be removed using a 3: 1 bleach - water solution for bleaching before applying the primer. All paint companies make primers to remove stains. We recommend the use of products Roman inc. for preparing the wall before installing the wallpaper http://romandecoratingproducts.com/homeowners