New Roof On Top Of Old Roof

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well.

New roof on top of old roof.

Manufacturers will still. Looks just as good and lasts as long. Your house will probably be worth less. Can new plywood be installed on a 40 year old roof without removing the old.

Roy gingrich of ellicott city has a 40 year old house with an asphalt shingle roof surface. Since it s being put on top of another less than perfect roof it s likely that it may not look as good as a brand new roof would. Shingles that are raised or misshapen make it hard to lay a smooth flat layer of new shingles on top. The use of roof hugger systems allows you add blanket rigid and or reflective insulation between the existing and new roofs.

It s clearly easier and cheaper to leave the old shingles in place but there s some special prep work involved with a re roof removing vents ridge caps and misshapen shingles among other things and you still have to replace or add new flashing which sometimes can be tricky over old roofing. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. A layer of old deteriorating shingles can make your new roof look bad. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Has the same manufacturer s warranty. If your existing roof is fairly old there s a good chance the shingles are damaged. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. By placing shingles on top of a damaged roof you ll affect the way the roof looks.

More difficult to check deck when you tear off the old roof you get a look at what s underneath. Installing a new roof over shingles takes less time than tearing off the old roof. Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. By using roof huggers the existing roof can be left in place.

If you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. The existing asphalt. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof.