Membrane Roof Over Metal Roof

Excluding water intrusion metal roofs are typically much less susceptible to damage from hail and physical damage than the membrane options.

Membrane roof over metal roof.

The quality and type of underlayments used on the project in the long term will affect the overall performance of the roof. Two common alternatives to tar and gravel are two ply membrane assembly and standing seam hidden fastener metal panels. Cost installed per sq. Example of a single ply over metal retrofit assembly.

Due to the configuration of the metal roof panels it is first necessary to install an eps expanded polystyrene insulation in between the metal ribs of the roof panels to create a smooth surface to support the 1 1 2 iso polyisocyanurate roof insulation over which the 60mil white tpo roofing membrane is installed. If you have a tar and gravel low slope roof typical of constructions in many areas in montreal you may consider changing the roofing material to something else. Less labor is needed and there are much smaller refuse fees. However they can be more susceptible to corrosion from salt spray or chemicals than conventional roof systems such as shingles single ply or modified bitumen in conventional construction the structure.

Here are the advantages to installing a metal roof over. For a mechanically attached residential pvc 50 mil membrane installed over a flat or low slope roof on a single. And metal roofs come in a variety of different profiles contours making waterproofing a challenge if using sheet type methods. Aluminum is the most popular type of roof over for mobile home users and with good reason.

Roof over materials 1. Tar and gravel first let s talk about what makes a good tar and gravel roof work. You don t have to do any work or remove any parts on the original roof. Expect to pay in the range of 6 50 to 12 50 per sq.

Single ply over metal. A mobile home roof over creates a unique opportunity to completely change the look of the home. Single ply roof systems are also lightweight and utilized for retrofits over existing metal roofs figure 2. Spray applied liquid roofing systems by their very nature being liquid will conform to any roof shape.

The reinforcing fabric and bitumen binder are combined into a single roll which makes installation easier. A mobile home roof over involves placing a new roof or roofing material over your existing roof there s little to no material removed which can keep costs down. The ideal waterproofing method for metal roofs are liquid applied membranes. Many single ply membrane roofs rely on the existing metal roof to function as a structural deck for support and attachment of the roof.