Installing A New Roof Over An Existing One

Another reason is curling shingles as you can only install a new layer if the first one is completely flat and level.

Installing a new roof over an existing one.

You can save. When roofing over your existing shingles can be a good idea. Metal roofing materials are available in several styles. Step 1 lay a metal roofing panel over the existing roof material in the bottom corner of the roof surface and fasten to the roof according to the metal panel instructions.

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. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. This provides a safer environment for both workers inside the building and the roofers as they install the new roof.

When you should tear off your roof and start from scratch instead. Unfortunately it s not an option for everyone. Installing a new roof over an existing one can only be done if you have shingles because you can only put shingles over shingles. 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.

Let s start with the good. When you recover your old roof stays and the new roof gets installed on top. But you must take care to install shingles correctly so they lie flat. It is not possible to mix materials nor to install a new layer over slate or wood tiles.

Sounds simple enough right. Reroof jobs are sometimes done without replacing flashings. Why installing new shingles over old shingles can be good. And a good job involves installing new flashings rather than relying on the existing ones.

With the existing roof left in place there are typically no leading edge safety issues. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. With a traditional roof replacement we completely tear off your old roof and install a shiny new one in its place. By using roof huggers the existing roof can be left in place.

Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin.