Crysticroof GRP FAQ's
Is it true GRP roofs will last for 50 years?
This is highly unlikely but may be possible giving certain conditions. A good quality GRP flat roof installed correctly will probably last around 30 years, possibly longer if maintained well.
Are all GRP roofs the same?
100% no.... CrysticROOF & CrysticRoof Premier have been developed by the one of the most technologically advanced Polymer companies in the world. There are numerous other GRP roofs systems on the market that use re-blended resins, inferior imported trims and have guarantees that have no independent backing rendering them worthless. This is why we will only use Scott Baders CrysticROOF system.
Ive been told that putting boards on top of the old felt & chipboard roof is quite normal and will save me money on tipping… is this correct?
It is never good practice to board directly over the original felt roof. For one the integrity of the decking and underlying structure could not be determined.
The felt covering should be removed so the decking can be inspected… if chipboard is found then this should be removed whatever the condition and replaced with OSB3 or a good quality soft faced plywood. Boarding over a failing felt roof would seriously reduce the lifespan of the new GRP roof and could lead to condensation problems.
What is a warmroof?
A warm roof is a flat roof with the insulation on top of the decking, not in the roof void. The roof system is then fitted directly onto this or onto a further decking.
This type of roof construction is now the industry standard on new builds and is far more economical than the traditional coldroof construction where fibreglass or rockwool was fitted between the roof joists.
Will standing water affect my GRP roof??
No the integrity of the covering will not be affected , although standing water will attract dirt and can start to look unsightly if not cleaned from time to time. It would be a good idea to have the falls improved/ increased whilst the flat roof is being replaced. This is something we would advise you on at the quoting stage.
Can I walk on a flat roof without causing damage?
Yes, lightfoot traffic would not be a problem, although we would incorporate an anti-slip surface onto the final coating.
Is GRP Fire Retardant or Fire rated as standard?
Not all GRP roof systems are fire rated, although it is often assumed that they are. However, CrysticROOF Premier is fire retardant to BS 476 part 3 and classified EXT.F.AA (double A rated.) this is the highest rating available for any flat roofing system.
What does BBA approved mean?
The British Board of Agrément (BBA) is an organisation partnered with the Government.
The BBA provides authoritative and independent information on the performance of building products. Assessment involves three distinct areas; laboratory testing, site inspections undertaken by the BBA’s own Inspection Services team and factory production control.
CrysticROOF Premier is just emerging from the accelerated aging process used in the new type of BBA testing and will be the only GRP flatroof system with a true 25year durability guarantee under this testing.
Will my GRP roof have pebbles or stones as the finish and are there any laps or seams?
CrysticRoof GRP has a smooth dark grey topcoat as standard, although other colours are available on request. As the system is moulded in situ using modified Polyester resins and glass fibre matting, the roof covering has no joints or seams… it is completely monolithic.
Watch a video clip of Crystic Roof GRP system