ROOF INSTALLATION PROCESS Existing roof: Bitumen roof laid on Chipboard decking boards. Finished with limestone chippings.   Condition: Limestone chippings encourage moss growth and no longer reflect the heat of the sun. Ultra violet radiation has caused the elasticity of the bitumen felt to leach out. The felt is now brittle and is susceptible to cracking as the timber decking expands and contracts due to atmospheric conditions.   Fascia: Painted softwood timber.   Condition: The paint has cracked and peeled due to general weather conditions. Leading to the timber to start to rot and decay.   Proposal: To Strip the roof off and dispose of from site. Re-board and laminate the roof with a high performance GRP waterproofing system. To remove the timber fascia and re-new with uPVC fascia and gutter.   All the chippings are scraped off the roof and disposed of. This will minimise the amount of debris falling in to the garage when the decking boards are removed.   The felt is stripped off and the decking board is removed from the joists. If possible the debris from the roof is thrown directly into a skip. If it is not possible to position a skip close to the roof the debris will be stacked on a thick protective polythene sheet prior to removing from site.   The roof is boarded out with new moisture resistant 18mm tongued and grooved boards. The boards are usually nailed to the joists using 63mm electro-galvanised annular ring nails fired from a nail gun. Using a nail gun rather than a screw gun reduces the risk of damage to plastered ceilings below   The timber fascia boards are removed and disposed of.  UPVC fascia is nailed in place to provide a maintenance free alternative to timber fascias, needing little more than a wash down periodically.   Pre-formed fibreglass trims are fitted to the perimeter of the roof to provide a superior aesthetic appearance. There are various profiles of trim used depending on the detail of the roof. In this instance only 2 types of profile are required, a standard drip trim along the gutter edge of the roof and an upstand trim which is slightly raised to prevent water running down the fascia where no gutter has been fitted.   The roof is laminated, this is the term we use for the process of applying the waterproofing system.  We add a catalyst to a cold liquid resin and roll it onto the fibreglass reinforcement mat. No more bitumen boilers required! Because it is applied in liquid form the resin soaks into the decking board to ensure the laminate is fully bonded to the substrate. The benefit of this is that interstitial condensation cannot form between the laminate and the decking board.   The final stage of the process is to apply the topcoat. The Topcoat is a colour pigmented resin usually in standard dark grey but can be coloured to any of the BS4800 range. The Topcoat is mainly applied for aesthetic reasons but also provides total UV resistance.   There is no risk of cracking, bubbling or deterioration caused by our extreme weather conditions.  There will be no moss growth as the finished roof has a smooth surface.   The system is monolithic so there are no seems or joints.   Fibreglass roofs are very strong and durable and more than capable of taking foot traffic, in fact we regularly use the system for use on balconies. So standing on the roof to clean your windows is not a problem!