Even when a GRP roof becomes dirty, the solution is simple. As a Topseal roof is a weld and joint free monolithic structure, any maintenance can be carried out quickly, and without the risk of causing damage by water penetration into the fabric of the building.

Normal dirt and debris can be removed with a hose and stiff brush. If a more powerful solution is required a GRP roof can be pressure washed without any concern of causing damage to the surface, or generating leaks. Cleaning complex shapes such as skylights is simple.

Pressure washing a traditional felt roof in this way would almost certainly cause damage..