1. Roof Deck Preparation
Clean the roof surface prior to installation and ensure the roof surface is clean, free of dust, dirt, rust, oil, grease, and loose material. The roof surface must be dry as this product will not adhere to a wet surface.
Trapped moisture may vaporise and negatively affect the performance of EPDM Rubber Flat Roof Solutions. This system is best installed onto a timber deck such as exterior grade ply or OSB3.
Any residual from an old roof should either be removed or over boarded as this will adversely affect the performance of the EPDM rubber membrane.
2. Install Drip Batten.
Install the Drip Batten wherever a gutter is present. This will extend the roof deck so that water drips into the gutter, rather than behind the gutter.
3. Install Drip Edge Trim
The Drip Trim has a front and back piece.
Install the Drip Trim back piece using the flat annular nails provided.
Align the curved top edge of the trim with the timber batten.
4. Chase out Wall Upstand.
Using an angle grinder or mortar chisel, chase out brick mortar joint, ready to accept the Wall Trim Flashing.
5. Relax the Rubber Membrane.
Lay the rubber membrane over the area you want to install it. Allow 30 minutes for the membrane to relax and for creases to disappear.
6. Fold Membrane Halfway.
Fold the rubber membrane back to expose half of the roof deck
7. Apply Water Based Adhesive
Apply Water Based Adhesive using a 9″ paint roller.
Leave a 100mm unbonded area around the roof deck perimeter. This will be used later to bond with our Contact Adhesive.
Roll the EPDM membrane back into position immediately, whilst the adhesive is STILL WET.
If the adhesive dries out (and becomes opaque), before the membrane is relayed then a thin coat can be applied to the back of the MEMBRANE and allowed to dry before installing.
Apply adhesive to a smaller area in hot weather to avoid premature drying.
Please note: water-based adhesives should only be used when the outside temperature is 5 degrees and rising and no chance of freezing conditions in the following 24-48 hours.
8. Sweep EPDM Membrane
Sweep the EPDM membrane to remove the trapped air and improve bonding to the substrate.
9. Apply Contact Adhesive to Roof Perimeter
Apply a THIN coat of Contact Adhesive to the roof deck perimeter (approximately 150mm width) and any vertical upstands.
Also, apply the Contact Adhesive to the back of the rubber membrane.
Contact Adhesive can be used to bond the rubber membrane to most porous and non-porous surfaces so it can be used in place of water-based deck adhesive if necessary.
10. Ensure Contact Adhesive is Touch Dry
Ensure the Contact Adhesive is touch dry. You can use your finger to test this. If it is still wet and not sticky, wait longer.
The Contact Adhesive gives off a vapour as it cures.
If the membrane is bonded once the Contact Adhesive has fully dried, bubbles/blisters may appear.
These bubbles should disappear over time due to the EPDM membrane being breathable. This process is faster in a hot climate.
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11. Cut Back Excess Material
Trim any excess material from walls and upstands, using the chase out as a guide.
12. Cut Flashing Tape to size
Flashing Tape is used to waterproof details in the roof shape for areas such as external corners. Cut the Flashing Tape to size allowing upstand height plus an extra 75mm on the length, and an extra 150mm on the width. (75mm on to rubber & 75mm on to Brick/render).
13. Apply Rubber Primer
Apply an even coat of EPDM Rubber Primer using a Scrubpad to an area slightly larger than the Flashing patch.
14. Ensure Primer is Touch-Dry
Ensure the EPDM Rubber Primer is touch-dry.
15. Install Flashing Tape
Install Flashing Tape.
When installing Flashing Tape, always bond the area which requires no stretching first, leaving the stretching part until last.
Keep the Flashing Tape in a warm place in cold weather, as this will aid the moulding process.