One of the major sources of heat loss is through windows and doors. A typical window or door has a U value of 1.60 (a good quality modern type) and that’s 5 times as much heat loss as a wall
Sunpipes
Water Penetration in Exposed Areas
Dampness can occur either from condensation within a building or water penetrating into the building, particularly in a wall. The way some insulated walls are made causes problems in areas where the wall is exposed to a lot of bad
Ventilation – Why is it Important?
Modern construction techniques produce housing that is particularly airtight. Old houses have an air pressure of Q = 15 so you didn’t need to worry about it. Modern construction produces an air pressure of Q = 5, sometimes achieving Q
Conversions – do they need a SAP test?
This was a house, now it is 2 flats. Why does it need a SAP test? When a house is converted into 2 flats, the use was residential before, but now the building contains 2 residential dwellings. This is a
Why Does My Extension Need a SAP Test?
An extension needs a SAP test if the glazing is more than a quarter of the floor area. This includes doors, windows and rooflights. If any glazing is removed from the house in order to create the extension this is