Roofing Over Existing Flat Roof

Roofing over an existing roof is also called reroofing or an overlay.

Roofing over existing flat roof.

Once complete your new metal roof will add tremendous curb appeal become more energy efficient and have a decades long service life. The roof should be in sound. The use of metal retrofit roofs allows the flat roofed buildings to undergo a transformation into a sloped roof building. Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed.

Silicone acrylic and aluminum coatings. Flat roofs have three main options for their coatings. The condition of the existing roof is critical. Roofing over an existing roof isn t necessarily the wrong choice.

How to install a roof over an existing roof determine the feasibility. One of the keys to over roofing is to tie the air control layer of the roof assembly to the air control layer of the wall assembly. A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel. These new roofs can be either low sloped less than 2 12 functional roofs or high pitched greater than 2 12 architectural roofs depending on the expectations of the building owner.

Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. On the gable ends this was pretty easy. Coatings are great flat roof replacement options because they can be directly applied to the roofing surface. The fully adhered membrane wrapped down over the cut back roof deck to tie into the wall water control layer and air control layer photograph 11.

Bur consists of many layers. These coatings are liquid applied directly onto the roof surface and then cure once in place. Add a new layer of shingles which means that there is no tearing off of the old roof. Inspect the condition of your current roof.

It is the process where roofers install a new roof over your existing one i e. On the other hand a full replacement not only leaves you with a better looking higher quality roof it also protects the value of your home and could save you money in the long run.