How Much Do Baffles Add To R Value Of Roof
Insulation level are specified by r value.
How much do baffles add to r value of roof. Recommended home insulation r values. Install roofing over a wind barrier like spun olefin. R value is a measure of insulation s ability to resist heat traveling through it. The most common blown in material used but it can rot and grow moldy if exposed to moisture.
For a very good introductory overview article on r value see r values over at the website of. Make a grid frame work of 2 dimensional to make space for the insulation. Baffles establish a channel for air to circulate between the insulation and the roof sheathing. The greater the r value the more protection you ve got until ice dams form.
I like rock all because of its higher r value fire and moisture resistance and good cost per r value 6. By installing the baffles properly you can increase the r value all the way out to the exterior sheathing. Fibers from recycled post consumer paper that are treated for insect and fire resistance. Fibers from rock or recycled slag from blast furnaces.
A new roof can increase home value but you might not see a 100 return on investment very few improvements if any offer a full recoup of money spent. When determining how much insulation you need don t guesstimate calculate. But even if you don t see a huge financial return a new roof can make you more likely to get full asking price lower time on market and smoother negotiations. Recommends an r 60 roof.
As listed in the definition above the baffle is meant to regulate the flow of air. The higher the r value the better the thermal performance of the insulation. However benjamin has seen great success with r values as low as 40. You should of course see the manufacturer provided technical data sheet for the r value of specific products.
R value of various materials. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Even with a 3 12 2 4 truss you are looking at a minimum r15 at the farthest edge. As with attic floor insulation moisture and heat removal are the reasons for creating proper air.
This could be metal or roof sheathing and shingles. The higher the r value the greater the insulation performance.