Altering the Intelo membrane to glued & taped OSB or Plywood that has a service cavity down below manufactured from framing lumber does make the assembly easier to develop.
We will give it a try. Existing is often a fourteen yr outdated roof with 2" of closed mobile roofing foam having an acrylic elastomeric coating.
If you need to make a conditioned attic, this information informs you what you need to know. To find out more on The subject, see Creating a Conditioned Attic.
A. As I wrote in the short article, "Most rafters aren’t deep ample to support the insulation needed to fulfill bare minimum R-values required by code, particularly when the rafter bays contain a ventilation channel. ...
Makers of soffit vents and ridge vents usually specify The web cost-free vent location in their items on merchandise packaging or in specifications readily available on line.
I'd include to Martin's listing of materials for rafter vent channnels, fiberboard sheathing. I exploit I joists for vented cathedral ceilings and staple 1/two" fiberboard to the bottom of the best cord in the I joists. It may be ripped with a table saw and installs promptly, fiberboard does have a high perm score and should enable little quantities of moisture to go through into the vent Area.
When you are a GBA member, you presently realize that GBA has a huge selection of architectural particulars in its element library for you to review and download.
Electricity codes establish bare minimum R-worth specifications for roofs and ceilings. There are several attainable code compliance paths; most builders choose the prescriptive path, which sets forth minimum R-values for roofs and ceilings in the prescriptive desk.
The sides of your roof are coated with asphalt shingled (GAF Slateline for being correct). It looks like I ought to pull down the fiberglass and possess it spray-foamed in advance of I drywall.
Even though the GBA Web site now consists of quite a few content articles on The subject, we continue on to obtain Repeated questions on The ultimate way to insulate a cathedral ceiling.
This informative article was Particularly practical, Thank you! I have just one dilemma about creating a vented assembly by generating an airtght process with accuvents.
This roof assembly looks informative post quite cathedral but if i have an understanding of properly its not vented in any respect, but has generous above sheathing foam. Is that this thought of a vapour safe assembly contemplating this short article says "Put in rigid foam insulation higher than the roof sheathing and air-permeable insulation concerning the rafters.
I do not feel that the burden of plywood or OSB is going to be a difficulty, but When you are worried about the extra excess weight, you can generally seek advice from an engineer.
Element D: Possibly notch the taken care of 2x4 spacers for fitting 1x4's horizontally across them so as to ...Element E: Set up metal roof around this.