Roofing Over Existing Flat 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.

Roofing over existing flat roof.

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 use of metal retrofit roofs allows the flat roofed buildings to undergo a transformation into a sloped roof building. Once complete your new metal roof will add tremendous curb appeal become more energy efficient and have a decades long service life. 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.

If your current roof is in good condition or you re really short on time it might be your best option. Flat roofs have three main options for their coatings. 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. Roofing over an existing roof isn t necessarily the wrong choice.

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. Coatings are great flat roof replacement options because they can be directly applied to the roofing surface. 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 is also called reroofing or an overlay. A properly installed layover roof can look and function as well. These coatings are liquid applied directly onto the roof surface and then cure once in place. Bur consists of many layers.

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. It is the process where roofers install a new roof over your existing one i e. 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.