Shim new deck material on an old frame
yankeePA
| Posted in Construction Techniques on
I have a 20 year old pressure treated deck, 2 x 6 decking, built on grade and I want to replace the decking only. The old frame is sound and I plan on installing new decking on the old frame. I want to maintain the same finish elevation on the new deck.
Question- how should I shim to make up the difference between the old 2 by deck material and the new thinner material? How thin can pressure treated be cut and still maintain it’s resistance to rot?
Thanks
Replies
are you relacing 1.5" material with the 1.25" (5/4) stuff???
this new ACQ is a whole breed different then the old CCA PT...
why not use heart Redwood at 1.5" thickness???
you'll be leagues ahead...
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Pennsylvania yankees can't get any good redwood at the yard.
I'd slice spacers from PT plywood, or from a naturally rot resistant material.
First, I doubt that your old framing is as good and sound as you believe it to be if it has been in full ground contact. Be sure to check it out well before going too far after you get the old surface off.
Next - the answer depends on what thickness and what material you are using to re-top it with. For instance if the new is 3/4", I would buy 1x6 PT and rip it into three pieces for shimstock. But if the new is 5/4, I would use twoby material and rip it the opposite way to thickness, and paint some cuprinol on it.
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