Roof Sheathing Nails Over Skip Sheathing

If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.

Roof sheathing nails over skip sheathing.

After you strip the roof do spot repairs to the existing sheathing where needed then go right over it. Deformed shank i e ring or screw shank nails are required near ridges gables and eaves in areas with design wind speeds over 110 mph 3 second gust but it is typical layout of roof sheathing panels on gable end roof typical layout of roof sheathing panels on hip roof most critical area for. Are recommended to avoid head pull through. Nails pulled out of decking.

If the current roof sheathing has only 3 8. It is relatively common practice to lay new sheathing over old. Both are readily available and come in 4 8 foot sheets. Composition and built up roofing must be applied to solid sheathing because these roofing materials do not have the structural capacity to span between the boards of open sheathing.

3 8 plywood can also be an option though it is not an option if there is not underlying skip sheathing or shiplap because it is not strong enough as a standalone sheathing. It will be considerably more difficult to locate the rafters to ensure proper nail placement. Note holes should not remove more than half of the sheathing section note. You ll want to use both longer sheathing nails and longer roofing nails.

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. Over spaced board roofs number p300c january 2006 when replacing roofing it is often necessary to cover spaced boards with a solid roof deck. 3 inch nails should be used during application to ensure that it connects the new sheeting skip sheathing and rafters together for a reliable hold. Apa rated sheathing panels which include plywood and oriented strand board may be used for this purpose.

Although i don t think installing new plywood roof sheathing over the old would be a grave mistake.