Manufacturers of soffit vents and ridge vents typically specify the net free vent place of their products on product or service packaging or in technical specs readily available online.
Thanks on your suggestions, Martin. Environmentally friendly Constructing Advisor continues to be the most effective for answering distinct issues I have experienced within the basement every one of the strategy to the roof. I wouldn't be capable of Construct my own property solo such as this without having you and other visitors assisting me out with information and facts.
The substantial density fiberglass is so much more dense compared to the medium and very low density fiberglass that it seems like it need to reduce the possible for convection in the batts, but at two to 3 moments the cost of medium density fiberglass batts the get may very well be nominal and never definitely worth the additional Price tag. Many thanks for sharing your experience,
Since I have explained the appropriate way to make it happen, I may also Allow you to understand that Lots of individuals have done Anything you propose.
This is often a possibility I'm thinking of in my household to avoid wasting the former proprietors freshly mounted roof shingles, even so the depth of the rafters are unable to accomodate enough insulation to meet code. I am pondering if I really should furr out the rafters to get the specified thickness of spray foam, or if installing some inches of polyiso foam for the underside of the rafters, once the spray foam, could operate?
If it looks as if I am out of my depth right here... yeah, you guess, I'm. I'm only a homeowner, with only some days of Web analysis beneath my belt. However the contractor is not really familiar with this roofing approach, so we are having to determine it out alongside one another. Take pleasure in your assistance immensely.
You wrote, "the rafters are still exposed," but I am unsure That which you signify by that. Do you've got kraft-confronted batts concerning the rafters, Along with the kraft dealing with nevertheless visible?
If you put in 2x4s (or 2x3s on edge, put in with lengthy screws) perpendicular to the rafters, you are going to tackle most of the thermal bridging worry with no need to add a layer of rigid foam.
I haven't got expertise constructing within the Carribbean or building steel buildings, so I am not the most effective human being to remark. But here are a few reflections:
Q. "The air barrier is to be put earlier mentioned the pine T&G ceiling and below the foam. Would you advise that we use a little something and that is each an air barrier plus a vapor barrier?
Thanks for locating the thread above...Notice that in put up #17, Robert Riversong talks with regard to the "vented Going Here above roof". I concur along with you that this method deserves some awareness for cathedral ceilings.
Another way to include R-worth on your roof assembly is to include a couple of layers of rigid foam inside the roof assembly — both earlier mentioned the roof sheathing or underneath the rafters.
I wish to correctly insulate my cathedral ceilings and was contemplating to spray two inches of shut mobile foam to sheathing, then fill with dense packed cellulose. I am wanting to know if I can connect craft paper and pine paneling for the 2x8 rafters after which fill the bays with cellulose.
Hello John - This Going Here venture was in Vermont in a very ten-yr aged house and because the caption indicates, the leading perpetrator was leaky can lights during the cathedral ceiling. But the situation was exacerbated by an attached greenhouse, which communicated with the remainder of the dwelling, and also a clothes dryer vented to your indoors during the Winter season.