This is a good question to ask when booking and the answer will be, very rarely. As part of Trevor's training with the Guild he learnt many different techniques to prevent dust and soot escaping. He is aware of how important it is to keep the customer’s property clean and free from dust. Sometimes a large block of foam is used to completely seal the chimney or a soot cloth is held in place with clamps. We have all the equipment to ensure your chimney is swept efficiently yet with as little disturbance to you the customer as possible. We use a specialised chimney sweep vacuum with Hepa filters to again minimise dust.
A rare exception could be when the chimney is blocked with a birds nest as this can then become difficult to contain all the dust.