Isolation

Providing you have no condensation or damp issues and your loft is accessible, this should be a job you can carry out on a DIY basis. Most people choose to insulate using insulation ‘quilts’ made from glass, mineral wool or natural wool — a depth of 270mm should be aimed for. If your loft is hard to access, you may need to go for blown insulation – mineral wool or cellulose – which is a job best left to the professionals. 

Quilts should be laid between the joists in the loft, with another layer at right angles to the joists. If you wish to use the loft for storage, you will need to lay floorboards backed with insulation over those between the joists. 

Finally, ensure the now cooler air in the loft does not cause droughts by buying an insulated loft hatch and placing draughtexcluding strips around the edges.