A complete roof survey will be required prior to the installation of a rubber roof (EPDM). Prior to commencement of the installation if the existing roof is being over boarded all debris will be removed and the surface will be clean and dry.
OSB3 boards will be screw fixed to the existing deck to provide a suitable flat surface. If the existing roof was holding water it will still hold water with the new roof unless the roof structure is altered to provide suitable fall. Treated softwood battens are then fixed to all up stand edges.
The membrane is then put into position on the boards, a water based contact adhesive is then applied to both the deck and the rubber.
The rubber is then flipped over and any creases or bubbles are brushed out.
Instant grab contact adhesive is then applied to all perimeter areas including up stands and walls, the rubber is also sprayed with instant grab contact adhesive. It is then fixed into place against all up stands as required.
A special plastisol metal two piece gutter trim is then screw fixed to the rainwater gutter edge, plastisol metal trims are then screw fixed to up stands. Lastly the wall trim is cut into the wall then is drilled, plugged and screwed to the walls and a thick bead of silicone/mastic is used to seal the top edge of the wall trim leaving all water tight upon completion.
Any detail work that requires the rubber membrane to be cut must be sealed using formflash tape correctly bonded using primer and it is important that all components are clean, dry and warm prior to installation. Failure to observe this procedure will result in breakdown of the system, if any leaks do occur with a rubber system it is almost always due to breakdown of the taped detail work.
It is important to remember that a rubber roofing system requires installation by skilled tradesman. It is generally not a DIY project and when correctly installed has a life expectancy in excess of 50 years.
The membrane generally used on domestic roofs is 1.14mm thick, although a thicker membrane is available it is usually not necessary unless a high volume of foot traffic is expected. It is possible to put EPDM self adhesive walk way pads, timber decking, block pavoirs or slabs onto the rubber roof without fear of damage.
Finally, a rubber roof is a flexible system, the deck adhesive remains flexible and the rubber has good elasticity throughout its life. On occasion bubbles may appear (and disappear) this is quite normal and is usually caused by a fluctuation in temperature. These expansion bubbles are not to be confused with faulty installation or sub standard adhesives.