Hard to treat cavity walls

Hard to treat cavity walls

An access issue is any facade where it is not possible to pitch a five meter ladder considering health and safety requirements. This includes for example a narrow passage way a busy thoroughfare of building up more than two stories a conservatory or large outhouse attached to the property

Narrow cavity is indicated by stretcher brick pattern with wall thickness to 220 to 250 mm

Possible high exposure should be recorded for any dwelling in exposure zones three or 4 See map at the end of these conventions if in doubt record as possible higher exposure