1	List internal walls to be insulated. Record each area and its depth us ing the measurements shown in the diagram. Subtract the areas of any doors or windows from each wall’s area. Add the total internal wall area.
2	Click forward for a list to record your measurements on. When completed, send to PEN Y COED–Warmcel for your quotation.
	DO NOT deduct timber studs or joists from the wall, floor or slope measure ments as this has already been allowed for in our calculations.