To lag pipes that are boxed in, unscrew the box and stuff pieces of glass fibre all around the pipes. Lagging with fibre bandage Equipment Damp rag Scissors Materials Strips of glass fibre or ...

Among its advice is: Lag pipes and water tanks in unheated interior areas, such as loft spaces and garages. Open the loft trap door on cold days to let heat circulate.

Lagging also reduces heat loss from any hot water pipes. Polyethylene foam can be used to lag pipes both indoors and outdoors. Outdoor taps can be insulated using a stop tap cover or a rubber pipe.