I need to rebuild the screen porch floor of my families lake cottage. My father, grandfather and uncle built the porch 35 years ago and this is the second time the floor has had to be replaced. They used 1 1/2″ thick T&G wood. The problem is that the joist run perpendecular to the cottage and the floor runs parallel. The slope is perpendecular to the floor boards and the water gets trapped in the tongue and groove joints rotting out the floor. The joists are in good shape but the floor is rotting. The only product that I have found is http://www.timbertech.com/Pin_TG.htm that is 1 1/2″ thick and T&G. I want to use T&G to keep out the bugs (screening below the floor is a real pain to maintain).
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See if you can find a sample at a supplier. The only time I used it, the homeowner didn't want to leave it as specified by Timbertech. He wished it tighter laid. We did force it a bit, but it sits covered over the top and perimeter (4') of their screen porch. It did not buckle but I was a little worried. Spaced properly, there's a gap between boards (top face doesn't lay tight), with weepholes which would help remove water in your parallel situation. It stained with some foods, but simple green seems to clean it up. Don't lean a ladder on the wall with the feet on timbertech, unless you like to ride.
Remodeling Contractor just outside the Glass City.
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