How To Insulate Over T111 Roof

Jenny flip the t1 11 over and use the smooth side for the roofing. In this article we are going to explore both financial and technical aspects when it comes to looking for the best method to insulate the metal roofing. Talking about metal roof insulation this thing is one of the most challenging things people work in this field is facing it demands and requires excellent skill and expertise which you may only get from a reputable roofing contractor.

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There is minor delamination on the south side and minor rot against the deck in the back.

How to insulate over t111 roof.

Msquared48 structural 11 nov 11 20 31. Things like tyvek on the outside under the t1 11 do help by providing a drainage plain and keeping water leaks away from the fiberglass. I have not found any problems behind the t1 11 that i have removed. They also provide another layer to seal air leaks but still let the moisture out.

Ice water and cause insulation breakdown. The current house has thermo ply over the studs then rigid insulation then t1 11. On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit. How to install insulation board over an existing roof membrane.

As for the fasteners if you don t want them to show from below use asphalt adhered insulation provided you don t have significant uplift considerations for the roof. The current trend is for a warm roof where insulation is installed between the rafters thereby keeping the roof timbers warm. So if you do an inside vapor retarder layer 3mil be careful to seal things well. It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is.

It is 20 years old and so far has fared pretty well.