1 exterior painting concern facing several property owners is the hairline cracks in the paint on plywood surfaces. Most builders have utilised a lot of plywood in the construction of residences these days. Plywood is a sturdy and sturdy material, but there are some issues that can create in plywood overtime. It is prone to cracking at the surface level. The hairline cracks that develop in plywood is referred to as checking in the exterior painting industry.
Checking typically happens on the outer veneer of a plywood surface that is exposed to sunlight and weather. Plywood outer veneers will crack along the grain line following exposure to repeated expansion and contraction due to environmental forces. As the separation in the grain occurs it causes the painted surface to verify.
1 exterior painting question regularly asked is how to properly treat places where checking is occurring. That generally depends on how undesirable the checking is. It's attainable you might require to replace the plywood if the cracking is bad adequate and if that location is obtaining a lot of sunlight, temperature and moisture exposure. Nevertheless, I would attempt the following method first before deciding to replace the plywood.
1.Sand the whole checked region with a power sander until smooth.
two.Spread a thin layer of caulk into the cracks and seams of the plywood surface.
3.Right after the sanding is comprehensive and all cracks are filled with caulk, prime the bare wood with two coats of Zinsser Peel how to fix water damage Stop. Peel Stop is a extremely elastic primer that can withstand the expansion and contraction of the cracks in the plywood with out separating. This elastic base coat is really essential in order to withstand the movement in the veneer layer of the plywood.
4.Following the Zinsser Peel Cease undercoat has dried completely, apply two layers of a excellent grade of outside property paint. My preference for the leading coat is Sherwin Williams's exterior Duration paint. Duration has 70 % more elasticity than your typical 25 year paint and will stretch without separating along the grain line of the plywood veneer.
five.In situations where the plywood is really aged, you could want to replace the wood totally.
six.If you determine to replace the plywood, then comply with the processes described above so you will not encounter future troubles.
One factor to bear in mind is that paint elasticity is essential for enduring the movement along the grain of plywood surfaces. Oil base paint and primers do not have adequate elasticity built into their formulas to manage the checking that will happen when plywood is subject to sunlight, moisture, and ever altering temperatures.
You ought to keep this exterior painting tip in thoughts. A thicker Paint film will permit the paint to stretch more, spanning the cracks for a significantly longer period of time. I advocate the 4 coats above (two coats of Peel Stop and 2 Coats of Duration) simply because a thicker film of paint will stretch additional with out cracking.