Dwarf walls
If there are any dwarf walls within the loft then these should also be insulated with a framing board such as Kooltherm K107 Pitched Roof Board between the timber studs and on the floor behind the dwarf wall, from the wall up to the edge of the roof in order to create a complete continuous insulation layer around the space.
Insulated plasterboard such as Kooltherm K118 Insulated Plasterboard may be fitted to the inner face of the wall. This insulation will help to provide a continuous layer of insulation around the space, preventing unnecessary heat loss.
Re-roofing a detached property
If you are re-roofing a detached property, then we suggest the best method would be to insulate ‘between and over’. This involves fixing insulation between the rafters and above the rafters.
This is called a warm roof as the majority of the insulation is above the timbers of the roof so the roofing timbers are insulated and therefore warm. A layer of insulation like Kooltherm K107 Pitched Roof Board would be placed above the rafters and the second layer of Kooltherm K107 between the rafters. One advantage of this is that it gives more headroom within the loft conversion. This method is only suitable when all the roofing is being completely removed as it requires access above the rafters.
