Skip Sheathing Roof

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

Skip sheathing roof.

When installed correctly wood shingles are rigid and allow the roof to be walked on. At a framing fraction of 10 higher than average due to hip valley framing an unvented 2x4 roof with blown cellulose to fill in the spaces on the skip sheathing will come in at about r13 including the r value of skip sheathing roofing interior exterior air films etc. Skip sheathing for shake roofs used to be really common around my area of the country and i ve never removed it or seen anybody else remove it for that matter. Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away.

Any apa rated sheathing that permits full board penetration by nails wind speed. Typically 1 4 or 1 6 boards of wood are installed with a 3 5 maximum space between each board directly over the roof rafters or in a cold roof system over the plywood deck. Spaced sheathing also called skipped decking refers to the construction details of the substrate which the cedar gets nailed to and thus secured to your home. 30 ft inland location exposure b enclosed occupancy category ii board spacing of nails roof region roof pitch 2zone spacing 6d box min.

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. It really depends on the type of roof when it comes to the sheathing or decking. I could not upload the file that i have attached the link for. By installing skip sheathing as the roof deck the spaces between the boards allow the wood shakes to breathe so that they dry more evenly after being soaked in the rain limiting warping.

Until the 1940s exterior grade plywood was not available. Osb or plywood over skip sheathing makes for a much stiffer roof deck resists problems with expansion better and obviously doesn t require all the hassle of removing it. It should tell you what you are looking for. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.

Roof decks on homes built before 1970 are often 1 8 fir pre plywood shiplap. Was your roof originally built with shiplap. Adding a layer of 1 2 plywood above the skip sheathing and 1 2. 100 mph 3 second gust mean roof height.

This does not apply in environments with wind driven rain and snow however. The architect spec d horizontal 1x4 strapping over the sheathing and then 15 roofing paper over that. Skip sheathing is very common with metal roofs.