Insulation for a better tomorrow


URSA Loft Roll is designed to fit between and over the roof timbers at joist (horizontal ceiling) level. The usual procedure for construction is;

  1. The roof trusses, sarking membrane (Type LR or Type HR), sarking boards (if applicable), tiling battens and tiles are all installed in the normal way in accordance with good practice and BS 5534.
  2. When using Type HR membranes there must be provision for roof space ventilation at the eaves and, if required, at the ridge also. Proprietary eaves ventilators should be used to maintain a clear path from the eaves vents into the roof void. Type LR menbranes may not require ventilation of the roof space provided they are covered by BBA certification.
  3. The plasterboard ceiling, incorporating a vapour control layer (500g polythene or foil backed plasterboard) is installed in the normal manner ensuring the VCL is correctly detailed and sealed.
  4. The first layer of URSA Loft Roll, same depth as the joists, is laid between the joists.
  5. The second layer of URSA Loft Roll is laid at right angles to the joists with all edges closely butt jointed.
  6. Ensure that the loft insulation continues over the wall plate to maintain continuity with the wall insulation and is tight against any eaves ventilator units.
  7. Ensure that any penetrations through the ceiling, especially if formed by following trades, are correctly sealed to ensure an air and vapour tight ceiling.