EPDM Installation Guide
Step-by-Step EPDM Installation Guide
Prepare the roof surface using our EPDM installation Guide : Clean the roof surface thoroughly and remove any debris. Repair any existing damage or leaks and ensure that the roof is level and smooth.
- Measure and cut the EPDM membrane: Measure the roof dimensions accurately and cut the EPDM membrane accordingly, leaving a few inches of overhang on all sides.
- Apply adhesive: Apply a water-based adhesive to the roof surface using a paint roller or sprayer. Allow the adhesive to dry for about 30 minutes until it becomes tacky.
- Install the membrane: Roll out the EPDM membrane onto the adhesive, starting from one end of the roof and working your way towards the other end. Smooth out any wrinkles or bubbles using a roofing roller.
- Trim and seal: Once the membrane is in place, trim off any excess material and use a sealant to seal around the edges, seams, and penetrations such as vents and pipes.
- Finish up: Allow the adhesive and sealant to dry completely, then inspect the roof for any gaps or leaks. Make any necessary repairs or adjustments.
You must ensure your roof deck surface is clean dry, dust oil dirt free. Any old surface material such residual bitumen needs to be removed. This product will not adhere to wet surfaces. Trapped moisture may vaporize and negatively affect the performance of this product. This system is best installed onto a timber deck either exterior grade ply or OSB3.
Fit 2×1 batten to the fascia where a drip trim will be required. The Drip Trim has a front and back piece. Install the Drip Trim backplate using the nails provided. Align the curved top edge of the trim with the timber batten.
The Drip Trim has a front and back piece. Install the Drip Trim backplate using the nails provided. Align the curved top edge of the trim with the timber batten.
Chase out the wall with a small angle grinder, and ensure a good straight line is in place use a batten as a guide if required.
30 Minutes is a good amount of time to let the EPDM rest.
Fold the rubber membrane back to expose half of the roof deck..
Apply Water-Based Deck Adhesive using a 9″ paint roller. Leave a 150mm un-bonded area around the roof deck perimeter for bonding later with Contact Adhesive Roll the EPDM membrane back into position immediately whilst the adhesive is STILL WET If the adhesive dries out (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 smaller areas in hot weather to avoid premature drying. (Water-based adhesives should only be used when the outside temperature is 4 degrees and rising and no chance of freezing.
Sweep EPDM membrane to remove trapped air and improve bonding to the substrate.
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 also be used to bond the rubber membrane to most porous and non-porous surfaces so can be used in place of water-based deck adhesive if necessary
Contact Adhesives must be touch dry with no puddles of adhesive. The Contact Adhesive gives off a vapor as it cures. If the membrane is bonded before the Contact Adhesive has fully dried bubbles/blisters may appear. These bubbles should disappear over time due to the EPDM membrane being breathable..
Trim any excess material from walls and upstands using the chase out as a guide..
Elastoform is used to waterproof profiles in the roof shape which can not be achieved with the rubber membrane such as external corners. Cut 9″ Elastoform to size allowing upstand height plus an extra 75mm on the length by 150mm on the width. (75mm on to rubber & 75mm on to Brick/render).
Apply an even coat of EPDM Rubber Primer using a paintbrush to an area slightly larger than the Elastoform patch.
All Primers must be touch dry.
Install Elastoform Tape. When installing Elastoform always bond the area which requires no stretching first, leaving the stretching part until last. Keep the Elastoform in a warm place in cold weather as this will aid the molding process..
Apply pressure to Elastoform to ensure fully bonded.
Stretch Elastoform down the wall edge.
Apply light pressure using a penny roller to ensure Elastoform bonds to all surfaces.
install Wall Trim in to chase out mortar joint.
Drill Wall Trim and wall with 7mm masonry drill to accept Rawl plug.
Apply mastic to wall trim and wall chase out.
The membrane can be folded without cutting when detailing an external roof corner prior to installing edge trims.
Pinch the rubber membrane together to form a pig´s ear.
Fold the pig´s ear on to the side of the roof. You are now ready to fit over the corner trim
Place the trim corner in position apply pressure to squash the foam sealer and nail the poly pins into fascia and batten.
The Plastic trim Kerb Edge is designed to deflect water back onto the roof. (traditionally this would be achieved with an arris rail). Cut the curb edge trim to length and apply pressure to the top of the trim and then polypin to secure The foam should be compressed by 70-80%
The Plastic trim Kerb Edge is designed to deflect water back onto the roof. (traditionally this would be achieved with an arris rail). Cut the curb edge trim to length and apply pressure to the top of the trim and then poly pin to secure The foam should be compressed by 70-80%.
Snap the joint clips provided in to position.
Fit plastic trim Drip or Gutter front trim using poly pins provided and install jointing clips where necessary.
Trim the excess rubber membrane with a sharp knife or scissors. Take care not to score the fascia or gutter.
The completed rubber roof has a life expectancy of 50+ years and will require very little maintenance throughout its life. Please feel free to contact us if we can improve our online training resources in any way.