Installing New Roof Over Existing One

You need a flat surface to install a new roof over existing shingles.

Installing new roof over existing one.

Looks just as good and lasts as long. The cheapest option would be to leave the old roof in place and place the new rafters over the existing roof. Has the same manufacturer s warranty. The installation of metal roofing is often easier and faster than other roof types and because of its simple design and generally large size can actually be installed directly on top of existing roofing materials like asphalt shingles and foam roofing.

Manufacturers will still warranty the roof for the same amount of time as a re roof as long as it s done by a qualified installer. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. Use premade roof trusses premade roofing trusses will be easier and take less time than installing a stick built roof. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Installing a new roof over shingles takes less time than tearing off the old roof. 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. Premade trusses will form the skeleton of your new roof above your old roof. Old shingles can curl over time.

Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles. Before you reshingle a roof read our step. There s a lot of visible damage. A properly installed layover roof can look and function as well.

Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level. Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. This provides added protection against ice dams.