Does EPDM need underlayment?

Underlayment is an important part of commercial roofing systems. It serves as a protective barrier against water, sunlight, wind, and debris, therefore, it is crucial for building managers to choose the right roofing membrane material.

Is EPDM the same as single ply membrane?

Ethylene Propylene Diene Monomer is a single-ply membrane that consists of a synthetic rubber compound that allows it to be flexible. EPDM has been used on commercial roofing facilities since the 1960s and is considered a time-tested option.

Can EPDM be installed on insulation?

Constructing a Flat Roof Using EPDM The insulation and vapour barrier can be mechanically fixed using fasteners and washers or a self-adhesive vapour barrier such as Alutrix can be installed with insulation bonded on top, using PU Adhesive Battens.

Can you lay EPDM over felt?

However, for surfaces such as felt, overboarding and adding an EPDM rubber roof is ideal for adding protection to it and further insulating your roof….Asphalt flat roof construction, repair and replacement with an EPDM Rubber Roofing Membrane.

Type of Bonding Surface	Flexi Proof	DuoPly
Felt	NO	PU Adhesive

Can you double layer EPDM?

For flat roofs, materials such as EPDM and TPO are usually approved for use up to two layers.

Which is cheaper EPDM or TPO?

EPDM roofs are the most economical choice for single ply roofing membranes. TPO roofing membranes are more expensive than EPDM. Regardless of which membrane you choose, it is better to spend more money and invest in a thicker membrane. Both EPDM and TPO roofs perform better and last longer if they are thicker.

Can you lay new rubber roof over old rubber roof?

The two requirements to install the new membrane directly over top of the old rubber is 1) that the existing insulation not be saturated with moisture and 2) that the deck is not rotten or rusted to the point that it cannot hold a screw.