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standing seam decking

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Guest User
3/12/2014
I currently have an old cedar shake roof laid over my t&g vaulted ceilings (no insulation and no plywood layer from what I can tell). Can a standing seam roof be installed directly over the t&G or what qualifies as "solid decking"? What components will hep to keep the roof as quiet as possible with rain?
Todd Miller
Isaiah Industries, Inc.
3/12/2014
The T & G should qualify as solid decking. Always check to ensure that you're meeting local building code requirements as well as requirements of your roofing manufacturer. You will want a layer of underlaymenet between the decking and the new roof. You might consider putting the roof on battens to help avoid sound transfer from direct contact with the decking.
Eric Novotny
An informed customer is the Best Customer!
3/13/2014
+1 You could also look into incorporating some rigid foam for insulation purposes and a good thermal break from the exterior although not as big an issue in your climate.
Guest User
9/24/2014
I currently have a 100+ yr old barn that has been converted into a house in the 80's. It has a metal roof over 1x4 purlins that are spaced with anywhere from a 3-5" gap between them. There is no underlayment/tar paper under the metal roof. The metal is one piece top to bottom and approx. 12-14" wide panels. It is attached with nails (which are working loose) and starting to get some leaks. The metal itself is in pretty decent shape minimal rust/deformation but does have all those nail holes. My ?'s are: 1. Would it be feasible to replace the nails with washered screws and recoat roof? if so what type of paint would you recommend? 2. I have been trying to get some estimates from roofing contractors to replace existing roof with standing seam. If I go this route am I better off to put roof on the existing purlins or put solid decking down and then the new metal? Had "experts" say each way was only way to go. 3. Do I need to put underlayment( tar paper or material such as aquagaurd) under the new roof regardless of which decking is used purlins or solid. 4.attic space is immense(upper part/old hayloft is all attic) with two layers of wood/flooring between living space and attic/faced fiberglass insulation and blown in fiberglass insulation on attic floor. Have never noticed a moisture/condensation issue from current metal roof. The roof is a simple hip roof with no projections vents/exhausts etc. It has a 8/12 pitch, is approx. 26' top to bottom and 50' wide
Eric Novotny
An informed customer is the Best Customer!
9/25/2014
1. Yes 2. Solid deck is preferable. 3. Yes. 4. Air seal the attic floor and make sure as little moisture is getting up there as possible.
Guest User
7/9/2017
Why would I need to air seal the attic floor(to prevent moisture from getting in my attic), when my attic stays moist any way, living in a very high humid environment?? I'm just wondering; cause high humidity is already in the air circulating from my soffit up through my roof vents, so why seal my attic floor to reduce humiditythen why
Eric Novotny
An informed customer is the Best Customer!
7/10/2017
You want as little conditioned air getting into the attic (if vented) as a default. This is based on an efficiency approach or a moisture concern in a colder climate.

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