WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
If you wish to do it proper, you need to address air leaks, tackle your recessed can trouble, and incorporate sufficient R-benefit to at least meet minimum amount code requirements. It is really a great deal of do the job, but it isn't really rocket science. Repairing these problems could be expensive, having said that.
Like most mansard roofs, your roof is unvented. Your mansard roof has unique sections -- the steep sections within the perimeter, along with the minimal-slope segment in the middle. All these sections should be insulated in an analogous way, due to the fact all these roof assemblies are unvented.
Naturally, you may nevertheless have thermal bridging in the rafters. But you will not have any dampness challenges.
Can it be ok to include peel-and-stick membrane to pick out areas with the roof and maintain The remainder breathable with tar paper?
If you want to produce an unvented insulated roof assembly, you might have two options: (a) You may add rigid foam to the exterior aspect of the roof sheathing, followed by a next layer of roof sheathing and new roofing, or (b) You could insulate the underside of your roof sheathing with spray polyurethane foam.
Doug... For some motive I did't see your write-up #seventeen. Appears like two of us at least Feel there may very well be a super easy low-cost Resolution.
Now that I've stated the proper way to make it happen, I will even Permit you understand that Many of us have done Anything you suggest.
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If you wish to use rigid foam, try this the best location to set it can be in addition to your roof sheathing, not under your roof sheathing.
We had a Zip Roof installed and a metallic Roof placed over it. The roof assembly is just not vented and taped all around the soffits. Ideally I would love to pack the whole cavity with blown cellulose. This string of conversations is giving me pause for believed.
To comply with the code -- and also to undertake a constructing technique that is significantly less dangerous -- you must both consist of air flow channels or you have to put in a layer of spray foam to the underside on the roof sheathing, next the suggestions defined in the report on this webpage.
Like Doug's style and design, the main focus is on developing a my site high perm layer for drying to the outside, that will nevertheless enable venting whilst blocking wind washing from the fluffy things.
The best Answer is to handle your situation from previously mentioned, by introducing an important amount of rigid foam over your present roof sheathing. You may Create up the layers oneself, of You should purchase SIPs or nailbase panels.
If you want to use only one form of insulation in unvented rafter bays, you are restricted to spray polyurethane foam. One more probability, certainly, is to build your roof with structural insulated panels (SIPs).