An uninsulated loft allows a huge amount of heat to be lost from your home, unnecessarily increasing your fuel bills. Even if you already have loft insulation - check that it is adequate. The current recommended thickness is 150mm
Measuring for insulation: Measure the overall area of the loft in square meters. Clear the area to make the work as easy as possible. You will need a few boards to lay across the joists giving you a platform on which to work. Remember the floor is the ceiling of the room below and will not support any weight. Your boards should be large enough to span the joists, but be careful not to allow them to overhang and tip when stood on. Ensure you have a suitable mask as the insulating material will emit a large amount of dust while being installed.
You should also wear protective clothing and gloves, particularly when handling glass fibre insulating material as this may irritate your skin. Make sure you wear safety goggles to protect your eyes.