What Primer To Use On Old Plaster Walls

It is also important to use oil based or any high quality primer to prevent all kinds of moisture on the surface.

What primer to use on old plaster walls. Walls in older houses present all sorts of problems you don t find with fresh drywall or plaster. Harmony wall primer an environmentally responsible and low odor formula for drywall pre wallcovering primer primes seals and sizes in one coat. If mildew is a serious concern use a stain blocking primer to prevent mildew stains from bleeding through the topcoat and then use a topcoat that specifically resists mildew check the label. The solution for previously patched plaster small cracks bumps and cracked and flaking paint even for old wood paneling and sand finish plaster is to use a wall liner.

Those walls can be very thirsty with some plasters. Plaster walls are more vulnerable to moisture than drywall and require high quality primers. Also because plaster mixing ratios vary a little don t rule out 2 full coats of primer. The bonding agent acts as an emulsifier to bond the new plaster to the old without the hit or miss method of wetting the old lath and plaster.

When it comes to paint old plaster walls you first need to fix all damaged areas of the walls by using a high quality patching compound recommended for use especially on plaster walls. Multi purpose oil based primer versatile sealer and stain blocker assures a uniform finish. Then fill in the hole as above. Use a paint pole to extend the reach of the roller.

Even with 2 primecoats two coats of actual paint. 70 year old plaster is much easier to deal with although you are going to want to prime it. They have superior stain blocking abilities and will keep any old stains from bleeding through to new paint. Oil based primers are the best option for old walls.

Use a pva polyvinyl acetate plaster bonding agent around the edges of the failed plaster and on any exposed lath before taping the crack. Oil based primers are also great at sealing out moisture which can be a major problem. I use kilz latex not a brand recommendation other manufacturers make a comparable product but any high quality primer should be fine. Use trisodium phosphate tsp to clean heavily soiled walls.