How to Connect an EPDM Flat Roof membrane to a Tiled Roof

Enlarging the living area of your house often requires installing a new roof over the additional square metres.

An EPDM Rubber Flat Roof is an economical choice and can be easily connected to the existing slope roof of your house. At Rubber Flat Roof, our high-quality membrane come in either 1.2mm or 1.5mm thickness. They carry a FREE 20-year and 30-year guarantee depending on thickness. This article will explain how to connect your EPDM membrane to a tiled transition.

Rubberall EPDM membrane is a 100% cured single-ply roofing membrane offering unique features and benefits. Ethylene-Propylene Diene Monomer is a high-density membrane. it is impermeable to water and is becoming the most widely used synthetic rubbers in the industry.

EPDM membrane to a tiled roof transition – how do you connect a flat roof to a tiled roof? 
  • When installing an EPDM membrane system with a tie-in to an existing tiled roof, remove a few courses of tiles.
  • Next, bond the membrane onto the sloped roof deck.
  • Peel the top of the EPDM membrane back and apply a bead of Water Cut-Off Mastic between the membrane and the deck.
  • Nail the top of the membrane every 15.24cms and install the tiles over the EPDM.
  • Keep the bottom course of tiles to a minimum of 10.16cm above the roof angle change. To fasten the bottom course of loose tiles tabs to the membrane, lift each tab and apply a 2.54cm long bead of Lap Caulk.

Other points to consider when choosing Rubberall:

  • In particular, it is simple and easy to install and here at Rubber Flat Roof. We have installation videos and tutorials.
  • Unlike Asphalt products which are heat applied, Rubberall EPDM is cold applied. There is no need for expensive welding equipment!

If you have any queries, please get in touch with our friendly team. Call us if you are unsure about the materials you need for your roof on 01392 927729 or email You can also check out our Roof Calculator that estimates all the materials you will need for your rubber roofing project.