Table Of Contents
- Is White EPDM Roofing Worth the Cost?
- Average EPDM Cost Per Sq. Ft. Installed
- Advantages of an EPDM Roof
- EPDM Roofing Installation
- Types of EPDM Roofing
EPDM is the least expensive of the three primary membrane types. However, a white EPDM roof is not cheap. The material of this white roofing is exceptionally long-lasting. EPDM has been the material of choice in canals and other irrigation systems since the early 1960s, long before becoming a successful roof waterproofing material.
EPDM rubber membranes are believed to be installed on 1 billion square feet of roofs worldwide due in part to their relative durability, ease of installation, and cost-effectiveness.
On the low end, installing an EPDM rubber membrane on a flat roof will cost between $4.50 and $6.50 per square foot. — Although not very prevalent, the low-end price is comparable to asphalt shingles, indicating how affordable it can be. The high-end price ranges from $6.50 to $10.50 per sq. ft. installed and would most likely be for a thicker or solar-reflective rubber membrane installed by experienced flat roof experts.
– more resistant to hail, heavy rain, wind, and severe cold than other membrane materials
– less costly to install than PVC and TPO roofs
– re-coating with liquid EPDM can increase the roof’s lifespan
– proper installation by quality professionals can provide warranties of up to 30 years
- Roof Deck Preparation. Before installation, clean the roof surface. Ensure the roof is clean and free of debris, such as dust, dirt, rust, oil, grease, and loose materials. The roof must be completely dry. Wet surfaces will not live up to this product. Moisture that has been trapped may vaporize, affecting the product’s performance. This system works best when installed on an exterior grade ply or OSB3 deck. Any remaining bitumen from an old roof should be cleaned or overboard, as it will compromise the EPDM rubber membrane’s performance.
- Install Drip Batten. If a gutter is present, install the Drip batten. This will increase the roof deck’s length, allowing water to drip into the gutter rather than behind it.
- Install Drip Back Drip Trim. There are two pieces to the Drip Trim: one for the front and one for the back. Using the nails supplied, attach the Drip Trim backplate. Align the trim’s curved top edge with the timber batten.
- Chase out Wall Upstand. Using an angle grinder or a mortar chisel, chase out the brick mortar joint to install Wall Trim flashing.
- Relax Rubber Membrane. Allow 30 minutes for the rubber membrane to settle in place.
- Fold Membrane Halfway. Flip the rubber membrane back to show the roof deck on half of the roof.
- Apply Deck Adhesive. Using a 9″ paint roller, apply Water Based Deck Adhesive. Allow a 150mm gap around the roof deck perimeter to be bonded with Contact Adhesive later.
- Sweep EPDM Membrane. Sweep the EPDM membrane to eliminate trapped air and increase substrate bonding.
- Apply Contact Adhesive to Roof Perimeter. Apply a THIN coat of Contact Adhesive to the roof deck perimeter and any vertical upstands (approximately 150mm width). Apply the Contact Adhesive to the rubber membrane’s back as well.
- Ensure Contact Adhesive is Touch Dry. Make sure the Contact Adhesive is completely dry and there are no puddles.
- Penny Roller Detail. To ensure Elastoform sticks to all surfaces, apply light pressure with a penny roller.
- Folding the Rubber Membrane on a Roof Corner. When detailing an external roof corner before installing edge trims, the membrane can be folded without cutting.
- Form Pigs Ear. To create a pig’s ear, pinch the rubber membrane together.
- Fold Pigs Ear. Fold the pig’s ear on the roof’s side.
- Fit Trim Corner. Place the trim corner in place, press down on the foam sealer to squash it, and nail the polypins to the fascia and batten.
- Fit Plastic trim Kerb Edge. The Kerb Edge is made of plastic and is intended to deflect water back onto the roof. (Traditionally, an arris rail would be used to accomplish this.)
- Fit Trim Joining Clip. Snap the supplied joint clips into place.
- Fit plastic trim Drip or Gutter Trim. Install the plastic trim. Trim the drip or gutter front with the polypins supplied and, if possible, install jointing clips.
- Trim Excess Rubber Membrane
- Completed Rubber Roof. The finished rubber roof has a life expectancy of more than 50 years and requires very little maintenance.