New Roof Old Plywood

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

New roof old plywood.

Cost to install flashing on roof. This means that you must replace old roofing plywood. If the old plywood had been removed. Sometimes referred to as roof sheathing or a roof deck this plywood acts as a foundation for the layers of underlay and the shingles on your roof and connects the roof to the frame of the house.

The new plywood thickness should be. One thing to consider is that the new plywood probably wants to be the same thickness as what would be used if it was used by itself on the rafters i e. The tear off gets a lot more complicated if you have something other than asphalt up there. Roy gingrich of ellicott city has a 40 year old house with an asphalt shingle roof surface.

Today a shiplap roof is usually 60 years old. As long as the new plywood itself can span the distance and carry the roof wind seismic and snow loads for your region adding new ply over old is just fine. Remove any old roofingnails refasten any loose wood and replace any rotten or damaged wood asnecessary to properly install new roofing. Both osb and plywood for the roof have been approved for use so it may come down to what you feel most comfortable using.

The existing asphalt shingles need replacement so he plans to do a tear off and re shingle. Replaced wood will cost additional xx for one sheet of 1 2 cdx plywood or x xx per linear foot of 1 x8 board. Remove the old roof. If you can see original wood shingles on the underside of your roof when you re up in the attic you ll need not only to tear everything off but also to install new plywood decking all of which likely adds 5 000 or more to your costs.

This will ensure that the strength of the plywood is enough to bridge spots on the roof where the old plywood was weakened to the point that it would sag under the load on the roof. In addition to installing a new roof you might need to. Open spaces form between the once tightly fitted shiplap boards. 5 8 inch 26 87 per sheet.

Here is approximately how much different options cost. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. Be sure to weigh the advantages and disadvantages of each option before you decide which way to go for your new home or your updated roof.