Advice – plywood porch floor coating
I have a porch floor made of 3/4″ pressure-treated plywood screwed to joists 24″ OC. I’d like to coat it with something simple, if possible – the cementitious applications seem like a lot of work and not flexible enough either. Any suggestions?
Replies
Well, it depends a lot on the weather there, how well the surface is drained, what kind of finish you want, how long you want it to last, etc.
Plain old deck/floor paint is probably not the best choice -- normal paint sticks poorly to horizontal surfaces exposed to the weather and will soon flake and peel.
An exterior semi-transparent stain will generally last longer than paint and is more easily "refreshed". An exterior varnish is another possibility.
Beyond that you could use epoxy paint, or "elastomeric roof coating". You could put down a rubber roof membrane, but it needs to have something over it to protect it from foot traffic and furniture.
Are you trying to make thios a roof for space underneath or a walking surface or what? 24" OC is too spread out IMO. What is your local load requirement? Is this ply a T&G? if not, it will flex at the butt joints and cause problems with almost any thing you put on it. Goota know the local conditions and the goals to answer.
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