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KORE FLOOR INSULATION - INSTALLATION GUIDELINES

Insulation Below the Floor Slab

  1. Where KORE Floor Insulation System is used below the floor slab, lay the hardcore in layers (150-225mm). Each layer should be well compacted with the surface blinded with quarry dust or sand to provide a suitable surface for laying a DPM (damp proof membrane).
  2. A DPM e.g. 1200 gauge polythene or a radon barrier, subject to site conditions, should be laid over the blinding with joints taped to prevent the passage of ground moisture. The DPM should be carried up the wall until it meets and seals with the damp proof course.
  3. KORE Floor Insulation System should be laid with closely butted joints, laid staggered with a break-bonded pattern and fitted tightly at the edges and around any service penetrations.
  4. Vertical up stands of insulation 50mm thick should be placed at the floor perimeter to minimise thermal bridging.The KORE Passive Foundation System offers the ideal solution for constructing a thermal bridge free foundation.
  5. Care should be taken to avoid damage to the insulation or DPM and radon barriers as the slab is being poured and operatives should make use of barrow runs and walkways whilst installation progresses.
  6. Airtightness details between the floor and the wall structure must be considered and best practice adopted.

Insulation Below the Screed

  1. Where KORE Floor Insulation is used below the floor screed, the floor slab with which the insulation is to be laid must be level.
  2. A DPM e.g. 1200 gauge polythene or a radon barrier, subject to site conditions, should be laid over the blinding with joists taped to prevent the passage of ground moisture. The DPM should be carried up the wall until it meets and seals with the damp proof course.
  3. KORE Floor Insulation System should be laid with closely butted joints, laid staggered with a break-bonded  pattern and fitted tightly at the edges and around any service penetrations.
  4. Vertical up stands of insulation 50mm thick should be placed at floor perimeter to minimise thermal bridging. The KORE Passive Slab Foundation System offers the ideal solution for constructing a thermal bridge free foundation.
  5. Care should be taken to avoid damage to the insulation or DPM and radon barriers as the slab is being poured and operatives should make use of barrow runs and walkways whilst installation progresses.
  6. The concrete floor over which the insulation is to be laid should be left as long as possible to maximise drying out in accordance with the relevant recommendations of BS 8203:2001 Code of Practice for the installation of resilient floor coverings.
  7. The minimum thickness of sand and cement screed is 65mm for domestic construction and 75mm for most other buildings. However, architectural specifications should be consulted. Different floor screeds have different installation requirements. 
  8. Airtightness details between the floor and the wall structure must be considered and best practice adopted.

Block and Beam Floors

  1. The floor surface should be smooth and flat - any irregularities should be removed. Lay a DPM to ensure that it is correctly positioned and turned up to meet the seal with the DPC.
  2. KORE Floor Insulation System should be laid with joints tightly butted and staggered joints. During construction the boards must be protected from damage by moisture sources, water spillage, plaster droppings, etc. Use scaffold boards to prevent wheelbarrow and other traffic damage to the boards. KORE Floor Insulation System should be over laid with 500 gauge polythene sheet to prevent the wet screed from penetrating the joints between the insulation boards.
  3. As is the case with solid ground floors, attention should be given to detailing to avoid thermal bridging.
  4. All surfaces should be level to accept the KORE Floor Insulation System. Uneven surfaces should be levelled prior to laying of the floor.
  5. Airtightness details between the floor and the wall structure must be considered and best practice adopted.

Suspended Timber Floors

Suspended__Timber_Floor
  1. KORE Floor Insulation System should be cut to fit between the timber joists and supported by carriers. These may be nails part driven into the sides of the joists at selected level, timber battens or proprietary saddle clips. 
  2. Where services need to be accommodated below the floor, KORE Floor Insulation System can be lowered to provide an insulated duct.
  3. Install flooring grade chipboard, ply or softwood timber flooring directly onto the joists fixing in the normal manner.
  4. Ensure that the void below the insulated suspended floor is well ventilated and that the sleeper walls do not restrict the airflow. 
  5. Airtightness details between the floor and the wall structure must be considered and best practice adopted.
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