Skip Sheathing Roof

Skip sheathing is very common with metal roofs.

Skip sheathing roof. If you re replacing your cedar shakes roof check out our discussion of re sheeting over skip sheathing. Adding a layer of 1 2 plywood above the skip sheathing and 1 2. Roof sheathing or decking is one of those elements. 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.

A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. When installed correctly wood shingles are rigid and allow the roof to be walked on. 100 mph 3 second gust mean roof height. 0 099 dia 4 inches o c inches o c 612 812 1 2 10 8 12 8.

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. The architect spec d horizontal 1x4 strapping over the sheathing and then 15 roofing paper over that. 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. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

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. 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. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. It should tell you what you are looking for.

30 ft inland location exposure b enclosed occupancy category ii board spacing of nails roof region roof pitch 2zone spacing 6d box min. 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. This does not apply in environments with wind driven rain and snow however. It really depends on the type of roof when it comes to the sheathing or decking.

Was your roof originally built with shiplap. Until the 1940s exterior grade plywood was not available. 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.