Things You'll Need

  • Tools & Equipment 
  • Roof Surface Preparation
  • Precautions

The ClassicBond fully-adhered system will adhere to wood, wood fibreboard and lightweight concrete. This product may NOT be applied to polystyrene insulation. The ClassicBond Water Based Acrylic Adhesive is intended for bonding to timber surfaces only. Other surfaces must be bonded with ClassicBond 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 this product.

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. Before starting please consult the “Precautions” section at the beginning of this manual.

If the bonding adhesive is not allowed to properly dry, gas bubbles or blisters may form under the membrane sheet. These bubbles or blisters may subside over time.

Due to solvent flash off, condensation may form on freshly applied adhesive when the ambient temperature is near the dew point. If condensation develops, possible surface contamination may occur and the application of adhesive must be discontinued. Allow the surface to dry and when conditions allow apply a thin refresher coat at a coverage rate that is approximately half of the normal coverage rate when re-adhering a previously coated surface.

Extreme care must be exercised when working on ladders, roofs, or at elevations above ground. If used as an emergency repair to a roofing system, contact the roofing system manufacturer for compatibility and to ensure compliance with terms and limitations of the warranty.

Surface can be slippery when wet, damp, or frost covered.

Do not stretch the product during installation.

Do not expose product to temperatures in excess of 82° C (180°F).

This product is not intended for use where roof top traffic or activity is anticipated without a protective layer installed on its surface.

Step 1


Unroll the ClassicBond EPDM membrane over the substrate so that the sheet is in the desired posistion and allow to relax for 1 - 2 hours until the transportation creases have dropped out (Please Note: During colder months, keeping the membrane stored at room temperature will help speed up the relaxation time also apply gentle heat to the membrane will also help with sharp creases)

Cut the membrane to the required length, and posistion the sheet to acheive an overhang off the roof at least 100mm for both the length and width

Step 2


Water Based Deck Adhesive is intended for adhering the EPDM to timber surfaces only. Other surfaces must be bonded with Contact Bonding Adhesive. Roofs over 100m2 must also be installed with Contact Bonding Adhesive.

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

If using Water Based Deck Adhesive mark 100mm around the roof perimeter as a guide to transfer from the Water Based Deck adhesive to the Contact Bonding Adhesive. If you are adhering the whole roof using contact bonding adhesive then this does not apply.

Step 3


Open and thoroughly stir the ClassicBond Water Based Deck Adhesive. Using a medium pile paint roller apply the water based deck adhesive to the timber substrate. The adhesive must be applied to 100% of the surface in an even coat without globs or puddles. The Membrane can alternatively be applied in a thin coat to the membrane and substrate.

Step 4


Roll the sheet onto the coated subsrate avoidiing wrinkles by rolled the middle of the sheet first. Immediately after rolling the sheet into the adhesive, broom the membrane sheet to achieve maximum adhesion

Step 5


Repeat Steps 3 - 4 for the other half of the ClassicBond EPDM Membrane