Peeling From Hardboarding: Vancouver’s Best Painters
Solution for Loose Flaking Paint
Remove all loose, flaking paint from the damaged area until you reach the bare metal. It is a good idea to follow coating removal with an application of a metal conditioner such al. Lithoform®, Galvaprep®, or similar conversion coating. Apply a galvanized metal primer, preferably latex, and follow with two coats of an acrylic finish.
If you must paint galvanized metal that has not weathered for six months, remove surface oil with a solvent such as lacquer thinner and/or a detergent wash, then coat the surface with a latex galvanized-metal primer or a Portland cement-based galvanized metal primer. Once the primer has dried completely, apply the topcoat.
PEELING FROM HARDBOARD SIDING
Peeling from hardboard siding is usually due to moisture buildup inside a structure. In tightly-constructed houses, moisture escapes through the walls because there is no place else for it to go. In the summer heat, the water trapped inside the exterior paint film is vaporized, and the resultant pressure causes peeling.
Solution
The source of moisture must be removed either by installing vents and/or repairing worn caulking; more detailed recommendations are covered later in this module.
Remove all loose paint and sand the edges smooth. Apply a primer to seal the board and cover with a topcoat after the primer is thoroughly dry.
Hardboard, which is reconstituted natural wood, is fabricated by reducing natural wood to fibers and then pressing the fibers together into panels. It can be either tempered or standard. Tempered board is denser and has a higher moisture resistance. Standard hardboard should not be used outdoors where it will be directly exposed to the weather.
Rick Anderson
www.vancouversbestpainters.com
www.vancouverindustrialpainting.com
Local: 604-PAINTER
Toll Free: 1-800-PRO-PAINTER
Posted in Painting Articles