How to install an EPDM Rubber roof (text)

August 6, 2018

To complement our EPDM installation video blog Roofing Kits Direct would also proffer a text version which can be easily printed off for on site reference.




The RKD selection of ClassicBond Kits and membranes offer a fully-adhered system which will adhere to wood, wood fibreboard and lightweight concrete.


DO NOT apply to polystyrene insulation.


Water Based Acrylic Adhesive is intended for bonding to timber surfaces only. Other surfaces must be bonded with  Bonding Adhesive. Roofs over 100m² must also be installed with Bonding Adhesive.


Be sure the roof surface is clean, free of dust, dirt, rust, oil, grease, and

loose material. The roof surface must be dry. This product will not adhere

to wet or damp surfaces. Trapped moisture may vaporize and negatively

affect the performance of your roof.


Good roofing practice dictates that ponding water be prevented. The

roof surface should have a positive slope of at least 1 in 80 to prevent

ponding water conditions.




Unroll the EPDM membrane over the substrate so that the sheet is in the desired position and is wrinkle free. Water Based Acrylic Adhesive is intended for bonding to timber surfaces only. Other surfaces must be bonded with

Bonding Adhesive. Roofs over 100m² must also be installed with Bonding Adhesive.


It is essential for ClassicBond EPDM membrane is allowed to relax prior

to adhering. The time required for this will vary depending on weather



Cut the membrane to length if required, and position the sheet to achieve an overhang off the roof of at least 75mm (3”) for both the length and width.


The RUSS (Reinforced Universal Secure Strip) should already be installed wherever the membrane turns up through an angle change. (UPSTAND)


Fold the sheet onto itself so that one-half of the sheet is exposed; take care to avoid wrinkles.


Open and thoroughly stir the WBA Adhesive or Bonding Adhesive. Using a medium nap paint roller apply the adhesive to the substrate, or if using Bonding adhesive, the rear of the membrane as well.


The adhesive must be applied to 100% of the surface in an even coat without globs or puddles. The adhesive can alternatively applied in a thin coat to the membrane and substrate.


Roll the sheet onto the coated substrate avoiding wrinkles by rolling the middle of the sheet first. Immediately after rolling the sheet into the adhesive, broom the membrane sheet to achieve maximum contact.


NB - DO NOT apply excessive pressure to cause the membrane to wrinkle.


Repeat the application of ClassicBond WBA adhesive for the other half

of the ClassicBond EPDM membrane.







Please reload

Recent Posts