- Tools & Equipment
- Roof Surface Preparation
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.
Fold the top sheet back to expose the seam area. Using a scrubbing pad apply the ClassicBond Primer to the seam area. Apply the primer past the seam edge to the line. ClassicBond Primer must be dry before application of PS tapes.
NOTE: If the EPDM membrane is contaminated with dirt, etc., clean the seam area.
Using moderate pressure set the Seam Tape into place to keep air from being trapped under the tape and unroll the 75mm wide tape along the length of the seam, aligning the Seam Tape (not the clear backing) along the chalk line. Care must be taken not to get any bubbles or wrinkles in the tape.
Lay the top membrane onto the Seam Tape. Pull away the poly backing from the tape at a 45° degree angle to the seam. While removing the poly backing, draw your hand across the seam, from the back to the leading edge. Roll the seam at right angles to the seam direction, not along it.