2 X 4 Fir Attic

The home is in portland oregon and there is limited room for insulation because the roof is framed.

2 x 4 fir attic.

For joists spaced 24 inches oc use. R 3 square edge rigid foam board insulation sheathing model 36l view the owens corning exterior insulation. Insulation for attic conversion with 2 4 framing. Owens corning foamular 1 2 in.

In this case use r 13 or r 15 fiberglass insulation. The joist spacing in some attics is 24 inches. 3 4 and 1 2 inch plywood. Osb in 4 foot by 8 foot panels over existing 16 inch oc joists.

Older homes especially those pre dating the 1950s may employ two by fours that truly are 2 inches by 4 inches. Maneuvering heavy 4 x 8 sheets of plywood or osb oriented strand board up to an unfinished attic is sometimes like trying to fit a square peg into a round hole. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Joist spacing and attic use.

Find 2 x 4 at lowe s today. Find douglas fir 2 in x 4 in dimensional lumber at lowe s today. Achieving greater r values in exterior walls in exterior walls add insulating sheathing to achieve a greater r value in your wall system. Find out what you can safely do with your space and which attic flooring can be installed.

Recycled glass or sand that s melted and spun into fibers bottom line. Two considerations will help you choose between the only two viable options for your attic. Commonly used and inexpensive but fibers can irritate lungs and skin though less so than in years past thanks to better manufacturing and it s less effective at blocking airflow than other materials.