Roofing Over Existing Flat Roof

How to install a roof over an existing roof determine the feasibility.

Roofing over existing flat roof.

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. On the gable ends this was pretty easy. Built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed. Bur consists of many layers.

Inspect the condition of your current roof. These coatings are liquid applied directly onto the roof surface and then cure once in place. 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. If your current roof is in good condition or you re really short on time it might be your best option.

Mcelroy metal s retrofit roofing systems consist of adding sub structural components to the existing flat roof to build a slope into the structure and provide a platform to install new metal roofing panels. 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. The roof should be in sound. 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.

Roofing over an existing roof isn t necessarily the wrong choice. Add a new layer of shingles which means that there is no tearing off of the old roof. 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. Silicone acrylic and aluminum coatings.

Coatings are great flat roof replacement options because they can be directly applied to the roofing surface. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. It is the process where roofers install a new roof over your existing one i e. The condition of the existing roof is critical.

Flat roofs have three main options for their coatings. Once complete your new metal roof will add tremendous curb appeal become more energy efficient and have a decades long service life.