If I am reading through your weblogs effectively, I could one) do shut-mobile foam and not have to make the furring strips air flow for the decking underside, but I would in no way see a roof leak until it had been in a sophisticated state or two) do open cell foam with the trouble in the air gap but moisture penetration could be more obvious additional quickly if the roof leaked. Based on the belief that there's really no way I can get that attic space's envelope wholly sealed (stick frame x 30 12 months old residence x 40 calendar year previous homeowner = some impossible to succeed in nooks and crannies), would you propose 1 type spray foam insulation over another, or can it be pointless if I am unable to have the attic envelope sealed a hundred%? Not simply could be the envelope sealing a thought, but naturally so is our sizzling and humid Houston climate As well as worth that you counsel us to hit the rafter boards with foam to cut back thermal bridging.

My partitions are insulated, my air leakage is just not far about the minimum or what ever It can be identified as (1400 cfm vs one thousand, The purpose at which I've to start out introducing new air). I've a fairly well insulated home- I am currently investing

The whole number of recycled substance Employed in fiberglass insulation differs from model to manufacturer and item to products, but some solutions are made with as much as 80 p.c recycled glass.

1. I've talked to a contractor about sealing and and insulating my attic. And my reaction is the same as your's about radiant warmth: it's not cost-effective!

The barriers include a hugely reflective substance that displays radiant warmth in lieu of absorbing it. They don't, having said that, lessen heat conduction like thermal insulation elements.

Now we have built in air gaps within our products to keep up radiant function of the foil for each tips of DOE.

Just one very simple distortion is usually that "radiant barriers don't have any R-price". Among the most commonplace radiant barrier products getting used currently in design and Garage door insulation renovation, like HVAC function, is bubble foil. By Martin's individual admission, bubble foil has a measurable R-worth, albeit minimal Until Section of an assembly (which is typically how the merchandise is tested and marketed).

In several spots, area setting up codes even enable using fiberglass insulation as an effective fireplace prevent in wall assemblies product of Wooden or steel.

Is a ventilated attic in a sizzling-humid local weather the best solution of course not, but it surely is better that not having it. Lastly, my h2o heater can be during the attic, so just one facet outcome is sort of no standby warmth loss with the h2o heater into the attic at a hundred and fifteen degrees:)

Oct 06, 2010 03:01pm

Radiant barriers encompass a hugely reflective materials, usually aluminum foil, which happens to be placed on one or either side of quite a few substrate supplies including kraft paper, plastic films, cardboard, oriented strand board, and air infiltration barrier substance. Some items are fiber-reinforced to raise durability and relieve of dealing with.

Terrific short article - are arguing this position with my insulation male For some time. Within the lighter aspect, everyone else capture the radiant foil/barrier ads in all places? Funny is good.

I am a tad mystified here. If radiant barriers mirror heat only If they're shiny and only having an air Place, how can foil confronted roof sheathing about an unconditioned attic in Texas replicate outdoor summer time warmth for making the attic cooler? If there is not any air Area involving the roofing and the sheathing, the very best side with the sheathing will not reflect outdoor heat.

I've browse with curiosity the reviews flowing back and forth. and very good exchanges with a topic that we could learn from. I'd interject that we have been spending too much time and positioning an excessive amount enphasis on "R value". the convenience amount in a home along with the Electrical power we purchase to acheive what we need are The bottom to work off of. R worth is just a Resource to assist forecast that instead of a true science. Insulation income love the word and many of us buy into it since it retains bringing us again to insulation and much more product sales. and it is not hard for advisors to say, incorporate extra insulation and all will probably be properly. The brand new product is spray foam and we will argue the deserves of open up or closed but we even now offer insulation.