I'm leaning towards not venting my cathedral ceiling and using closed-cell spray foam insulation. My walls are double 2x4 stud walls 12 inches deep and will have 2-3 inches of closed cell spray foam insulation to create a air and vapour barrier first, then the rest of the cavity will be filled with dense pack cellulose insulation, with an intello vapour barrier holding cellulose all in.
I'm wondering if I can do the same for vaulted ceiling? or am I better off going with straight closed-cell foam insulation.
The builder is using 16.5 deep trusses 24” off centre, I want to achieve R-80 in roof.
The coat of continuous insulation always works on the outside of dense packed cellulose by ensuring that the dew point is never attained within the cellulose. That said, continuous is just that, and roof rafters tend to create thermal bridges. Even with important levels of rigid insulation in the roof, it is best practice to double strap over the roof and vent anyways. Better to be safe than sorry.
Fitting extra insulation to an older home when renovating can be a great idea, but when insulating exterior walls from the outside take care to do it right. Ec…
Larsen truss wall systems are ideal for improving wall insulation when renovating homes & for building new homes with high performance insulation systems & dou…
Removing radon gas from existing basements and crawlspaces can be very effective, here are different options for different situations.… Radon Gas in Crawlspace…
Learn how to fix Ice dams on your roof before they cause damage… Ice dams form at the bottom of roofs, letting water penetrate and cause damage to the interior…
A roof leak isn't really a roof leak if it’s leaking on a sunny day. It's more likely an accumulation of frost finally melting.… When a warm sunny day arrives …
Homes are often over-insulated in some parts and relatively under-insulated others. Balanced insulation when building a Green Home means applying your insulati…
Despite the good intentions, Earthships in cold climates can't work because they contradict the laws of physics.… I'm not the Mike Reynolds who invented the Ea…
The coat of continuous insulation always works on the outside of dense packed cellulose by ensuring that the dew point is never attained within the cellulose. That said, continuous is just that, and roof rafters tend to create thermal bridges. Even with important levels of rigid insulation in the roof, it is best practice to double strap over the roof and vent anyways. Better to be safe than sorry.