Identifying the Roof Membrane Before an Flat Roof Roof Replacement

Identifying the Roof Membrane Before an Flat Roof Roof Replacement

A solid and reliable Flat roof is important if you want to continue enjoying your mobile home without the hassles brought by an inadequate roofing. A basic knowledge of the different types of Flat roofs is crucial if you want to care for your roof.

There are basically three types of materials that your Flat roof could be made of—metal, fiberglass or Flat. Identifying a metal roof is fairly easy. While they are not common these days, metal roofs such as galvanized metal and aluminum were widely used decades ago. Fiberglass roofs are also becoming rarer nowadays.


Around 20 years ago the Flat industry found a new type of roofing material that works better than metals or fiberglass and has qualities not found in the old roofs. The product is a Flat roofing membrane that is lightweight, cost-effective, easy to install and maintain, seamless and resistant to UV light.
EPDM and TPO Flat Roofs

The two popular types of Flat Roof roofing are EPDM (Ethylene Propylene Diene Monomer) and TPO (Thermal Poly Olefin). If your Flat has a Flat roof, it could either be EPDM or TPO. When the time comes when you need to have an Flat Roof replacement, you should be able to identify the type of Flat has in order to install the right material.

How do you know which type of Flat roof is installed on your roof?
Check Owner’s Manual

The first thing you should consult is the Flat owner’s manual. It should plainly state what type of Flat membrane was used on the Flat. It will also lists the maintenance and cleaning instructions for your Flat. If you have no access to the owner’s manual or for some reasons it does not specify the type of rubbing membrane used, there are ways to determine the type of your Flat Roof roofing.
Gray or White Streaks

Look for gray or white streaks on the sides of the Flat. EPDM membrane is designed to oxidize over time to protect it against UV rays and ozone. The oxidization or shedding produces the gray or white streaks found on the body of the Flat.

Unlike EPDM, TPO Flat roof does not oxidize so you will not see any white or gray streaks on the sides of the Flat. Another characteristic of a TPO membrane not found in EPDM is its glossy look.
Slippery When Wet

Another difference between the two types of Flat roofing is that EPDM is very slippery when wet while TPO is not.