Can You Put New Plywood Over Old On A Roof

Can You Put New Plywood Over Old On A Roof. 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. 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.

Can You Lay New Roofing Shingles Over Old? Orlando. YouTube from www.youtube.com

Apply new roof sheathing (osb) directly over old sheathing (sagging ½ inch plywood) or rip the old sheathing off and apply new sheathing to the trusses? They get estimates from three roofing contractors, all for the same brand of shingles, and choose the one with the lowest price. This is 1970s construction, trusses on 2 foot centers, medium slope, and we plan to use gaf timberline ultra shingles (these are heavy) for the new roof.

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Beside this, how do i know if my roof sheathing. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

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I have installed new plywood over existing numerous times with out problems. The new plywood thickness should be.

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I have installed new plywood over existing numerous times with out problems. They said they have to or the roof will be wavy.

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Per square foot at most.not significant, unless you live in a high snow zone or your roof structure has decayed too. My neighbor had an additional 3/8 layer of plywood added.

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He has explained to me that placing the osb over the plywood sheathing is an accepted practice and saves me on the labor of having to remove the old plywood while adding strength. The new plywood thickness should be at least equal to the exusting plywood thickness.

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The exposed edges of the 3 layers of rigid insulation are no longer exposed. The new plywood thickness should be.

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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. He has explained to me that placing the osb over the plywood sheathing is an accepted practice and saves me on the labor of having to remove the old plywood while adding strength.

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It doesnt look wavy and 2 other guys said they just would put over t and g. But i can give a general answer.

(Osb Board Could Weigh Slightly More Because It Has Fewer Voids And Significantly More Glue.) So, Adding A Layer Of 5/8 Osb Board Might Add 2.0 Lbs.

This is 1970s construction, trusses on 2 foot centers, medium slope, and we plan to use gaf timberline ultra shingles (these are heavy) for the new roof. If the old plywood had been removed). One was for a fortune to put new plywood over my existing t and g.

Similarly, You May Ask, Can You Put New Plywood Over Old On A Roof?

Apply new roof sheathing (osb) directly over old sheathing (sagging ½ inch plywood) or rip the old sheathing off and apply new sheathing to the trusses? In my opinion it would be a better roofing job to strip off the old shingles. 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.

Nailing Plywood Sheathing Atop The Existing And Most Likely Worn And Damaged Wood Shingles Or Shakes Gives An Uneven Mailing Surface And Makes A Pine Plywood Roof Decking Questionable.

If you’re wondering why the roofers can’t just install new shingles and roofing accessories over your existing roof deck, this article will guide you through one of the most common reasons: Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles. Another reason is curling shingles, as you can only install a new layer if the first one is completely flat and level.

If You Plan To Leave Your Existing Roof Covering In Place And Install A New Waterproof Membrane Over The Top You Will Need To Consider The Following:

You may also be adding more weight than the structure is designed to carry. They get estimates from three roofing contractors, all for the same brand of shingles, and choose the one with the lowest price. Beside this, how do i know if my roof sheathing.

Your Roof Deck May Be Shiplap.

My neighbor had an additional 3/8 layer of plywood added. The new plywood thickness should be. Make sure your roofer staggers the new plywood joints so it off sets the existing.