WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
It looks like you may have an current roof with tile roofing. I am guessing that you're writing from Europe. It sounds like the insulation is made up of "restricted-fitting Wooden fibre board" involving your rafters -- thickness and R-price aren't specified.
A vented cathedral ceiling only makes sense In case the geometry within your roof is straightforward. You need a straight shot within the soffits to the ridge. That’s fairly uncomplicated over a gable roof without any dormers or skylights, but In case the geometry of one's roof is complex — with options like hips, valleys, and dormers — it’s unattainable to guarantee air circulation by means of your whole rafter bays.
You might be in local climate zone five. I spelled out the minimum amount R-values to the method you happen to be using in on the list of paragraphs higher than, during which I wrote, "As outlined by .
I've a factor for blueskin, for a each an air and vapour barrier, and also it will work as a seal with the screws that hold anything down. In reference for the vaulted schematics on This web site, it displays vapour/air barrier in addition to insulation, which received me wanting to know. Pretty much as good as I'm installing supplies, no person is perfect, and an air leak could produce between XPS seams. Once ANY dampness will get all the way down to reduced sheathing, it really is recreation above.
Unless 1 utilizes Serious treatment with The nice and cozy side air barrier and this features understanding that all fastener penetrations are sealed as well you must suppose some air circulation. The installation referred to in this article with the ice and water shield beneath the shingles of course created an improved air barrier than no matter what was on The nice and cozy aspect.
When you’re developing a new house, nonetheless, here’s my information: if you want to insulate with cellulose, ensure it is a ventilated roof by together with ventilation channels below your roof sheathing. Leaving out the air flow channels is dangerous.
Section D: Possibly notch the addressed 2x4 spacers for fitting 1x4's horizontally across them so that you can ...Component E: Put in metallic roof in excess of this.
I don't have lots of space above or under the roof construction for insulation / venting. Would a flash / batt unvented assembly perform under The only sheathing deck? My insulator has accomplished Plenty of of those domestically.
Positive the instance shown is for your lower pitch (not flat) roof. But improve it to some pitched roof a lot less than six-twelve and the details remain a great system (I think).
Preferably, you should have an airtight barrier over and beneath your fiberglass batts. If you can reach Individuals two air barriers, then wind-washing just isn't an issue in a roof like yours. (It may be inside a vented unconditioned attic, of course, especially near the soffits.)
Most of the information view I run across appears to be from your cellulose marketplace that statements wind-clean is an enormous problem with fiberglass; and from your fiberglass industry which asserts that the cellulose group overstates The problem and that for the extent wind-wash takes place it is de facto inconsequential.
Hi Every person. I see I am a little late for the party on this thread but I hope another person can continue to assistance me. From my subject matter line you'll be able to see I've fairly the home. I'm the house owner and frustrated with my leaky roof. I reside in WI and my roof has asphalt shingles.
Although the GBA website by now incorporates numerous posts on The subject, we continue to receive Regular questions about the best solution to insulate a cathedral ceiling.
I have already been using rigid breadboard type expanded polystyrene from the rim joists and websites believed exactly the same can be place under the sheathing concerning the rafter bays, and with any gaps sealed with a urethane spray foam such as Fill visit site and Seal. Is there a quality which makes spray foam acceptable and rigid foam unacceptable?