Painters Painting In Vancouver: call: 604-PAINTER
PAINTING OVER[: AREAS WHERE WALLCOVERINGS HAVE BEEN REMOVED
Areas previously decorated with wailcoverings may have a residue of paste and/or wailcovering backing if the proper commercial walicovering paste has not been used. Failure to assure proper surface cleanliness can result in staining or discoloration of the paint film. Newly applied paint film may fail to properly cure due to chemical reactions between the resins in the film and the residual paste on the wall.
The paint film may separate into layers, especially if a latex is used. When paint is applied over residual wallcovering backing, the water in the paint reacts with the walicovering paste.
For Painting Over Wancovering Residue
Wall preparation is key. Make sure to remove all walicovering pastes and backings by using a commercial grade walicovering remover or paste remover. If you are unsure of the complete cleanliness of the wall, use a primer containing tung oil and either a latex- or oil-based topcoat.
PADDING OVER WALLPAPER MW OTHER FLEXIBLE WALKOVERINGS
Problems usually caused by improper surface preparation include dye-bleed, uneven surfaces that have not been spackled, and loose seams.
Solution For Painting Over wailcoverings
When possible, remove old walicovering attached to a solid surface rather than painting over it. However, if wallboard or sheet rock is underneath, paint over the walicovering because wet-stripping can damage those surfaces. When painting textured wallcoverings, be aware that the texture will show through the painted surface
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It is very important that all surfaces be clean and stain free. Reglue or remove any loose sections of wailcovering and make sure seams are tight. Spackle and sand areas needing repair. You may wish to duplicate wailcovering texture on spackled areas for uniformity. Ask a local supplier for suggestions. |
Test for dye-bleed with a finish coat. If dye shows through or the surface is stained, a prime coat is necessary. Oil-based stain-killer/primers are quick drying and work well.
When painting over vinyl or foil wallcoverings, the surface should always be primed. A clear or semi-clear acrylic sealer is best for vinyl; an oil-based primer is best for foil.
When the primer is dry, apply a finish coat of latex or oil. If latex water-based paint is used, bubbles may develop where water reacts to dry areas of wallcovering. Wait to see if bubbled areas dry back against the wall. If they do not, slit the bubbles with a razor blade, remove the loose paper, then spackle and sand. Repaint the affected areas.
Rick Anderson
www.vancouversbestpainters.com
cell: 604-painter
Posted in Painting Articles