Osb Over Old Roof

After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood.

Osb over old roof.

The roofing crew uses a red ripper roofing demolition tool to pry up cap shingles which are collected in a plastic bin along with old boot flanges and any loose shingle tabs. I have not been able to locate anything that addresses this point. Can new plywood be installed on a 40 year old roof without removing the old. Fortunately this is one issue that has primarily been standardized by the industry.

Roy gingrich of ellicott city has a 40 year old house with an asphalt shingle roof surface. Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood. Can oriented strand board osb be used for roofing. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. We are thinking of nailing 7 16 osb over the existing plywood and making sure the the joints between the layers do not line up. I m going a reroof in two weeks time where we are removing all the old roof covering and the old sheathing delaminated and rotted 3 8 plywood and replacing it with new 5 8 t g plywood.

Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. Watch this now to learn how to avoid this same pr. However you might find that osb can better suit your needs than plywood for the roof. Open spaces form between the once tightly fitted shiplap boards.

The existing asphalt. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. Because of its construction some manufacturers actually make larger sheets of osb. Sometimes they use a standard gardener s potato fork but the best tool for the job is a red ripper integrated roofing technologies 2413 stevenage dr unit 11.

Anyone aware of code or other issues inherent in this approach.