- Tools & Equipment
- Roof Surface Preparation
The DuoPly fully-adhered system will adhere to wood, wood fibreboard and lightweight concrete. This product may NOT be applied to polystyrene insulation. The DuoPly Water Based Acrylic Adhesive is intended for bonding to timber surfaces only. Other surfaces must be bonded with DuoPly 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.
Cut the DuoPly to fold round the corner with no tenting or creasing of the membrane. Next cut 225mm PS flashing to correct size to cover the area, mark round the flashing and apply the DuoPly
Once the primer is dry, remove the cellophane backing on both sides and start fitting from the top point. Work the tape down releasing any air in the process. Work the tape tight into the bottom angle change avoiding any bridging or bubbles, then fold the tape onto the deck area.
Roll out the adhered flashing with a steel hand roller to achieve full strength in the join.
Repeat the process, overlapping the first flashing from the other direction using another piece of 225mm flashing shaped and applied using the same method. Roll the entire flashing to finish, ensuring the tape is pressed in fully to any steps to remove any openings.