Following reports of door-to-door salesmen offering to coat residents’ roofs to help retain heat and to clean roof tiles, Nottinghamshire Trading Standards have issued a warning.
The so-called salesmen claim the coating process provides thermal insulation, but roof tiles are designed to allow air to circulate in the roof space.
In addition, experts say the use of high-pressure hoses to clean the roof can actually damage tiles and force water in to the roof space.
People may be tempted by a very low initial quote but the price may rise when the job starts. The work may also be unnecessary and of quality poor.