Open Cell Or Radiant For Roof
Open cell spray foam is made of open cells that are softer and flexible with the physical structure similar to a sponge shape.
Open cell or radiant for roof. Using a cool roof material on the exterior is more effective but still not sufficient. Less common of the two types of spray foam open cell is mostly used for residential and commercial insulation. R20 open cell foam is fine under roof decks but would not meet the r30 code minimums unless you also had r10 of rigid foam above the roof deck. For professional installation plan to pay 2 000 or more.
Open cell spray foam. Material costs and going with diy the open cell costs about 600 to cover 1 000 sq. Closed cell foam while also useful in residential construction insulation is used in a variety of commercial industrial and residential applications because of the excellent strength and insulating properties described here. The installation can either include ventilation under the roof deck or have no ventilation.
Radiant barrier paint is a scam. No paint exists that meets the technical definition of a radiant barrier. Contractors tend to stop at r20 since it s the thickest layer than can be installed safely and well in a single. As an example the worst performing osb in climate zone 4 is the osb on a north facing roof insulated with open cell foam over an attic with a duct system that is fairly well sealed 4 duct leakage an attic floor which is fairly leaky 2 0 cfm50 cfa and a house with high indoor moisture production.
You can insulate your sloped ceiling with either open cell or closed cell spray foam. Applications that typically use open cell spray foam include residential construction insulation under roof trusses for conditioned attics and as a spray foam sound insulation in media rooms etc.