Technical Data Sheet

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U-VALUE CALCULATION

The U-value of a floor is calculated by dividing the floor exposed perimeter (P) by the floor area (A). TGD Part L of Building Regulations requires that the U-value of exposed floors must not exceed 0.25W/m²K. Where the source of space heating is underfloor heating, a floor U-value of 0.15W/m²K is required.

 

                                                                   P/A Calculations

 GROUND FLOOR SLAB*
 Product Conductivity   U-value  0.2 0.3   0.4 0.5   0.6 0.7  0.8   0.9 1.0 
 KORE Floor SD(mm)  0.037W/mK  0.25  55  80  90 100  105  105  100  115  115 
 KORE Floor HD(mm)  0.034W/mK  0.25  50  75  80  90  95  100 100   105  105
 KORE Floor Silver(mm)  0.030W/mK  0.25  45  65  70  80  85  85  90  90  95

 SUSPENDED TIMBER FLOOR*
 Product Conductivity   U-value  0.2 0.3  0.4  0.5  0.6  0.7  0.8  0.9  1.0 
 KORE Floor SD(mm)  0.037W/mK  0.25  80 105  115  120  125  130   130 135  135 
 KORE Floor HD(mm)  0.034W/mK  0.25  80  100  105  115  120  120  125  125  130
 KORE Floor Silver(mm)  0.030W/mK  0.25  70  90  100  105  110  110  115  115  120

 

*Ground Default value taken as 2.0W/m²K.

 

                                                                   P/A Calcalations 

 GROUND FLOOR SLAB WITH UNDERFLOOR HEATING
Product Conductivity  U-value  0.2   0.3 0.4  0.5  0.6  0.7  0.8  0.9  1.0 
 KORE Floor Silver(mm)  0.028W/mK 0.15   110 130  140  150  160  160  160  160  160 

 

 

PHYSICAL PROPERTIES

 

Properties  Units   Density
   kg/m³  15-20 Standard 20-25 Standard 

 WHITE EPS
 Thermal Conductivity W/mK  0.037  0.034 
 Compressive Strength kPa   >95  >211
 Bending Strength kPa   >171.70  >377.10
 Dimensional Strength  DS(n)  2  2

 SILVER EPS
 Thermal Conductivity  W/mK 0.030   0.028
 Compressive Strength  kPa  >95  >211
 Bending Strength  kPa  >171.70  >377.10
 Dimensional Strength  DS(n)  2  2

 

 

INSTALLATION

  

Insulation Below the Slab

  1. When installing below the ground floor slab the hardcore should be level and must be binded with sand or cement based binding before application of the KORE Floor boards.
  2. During construction care must be taken to ensure that the KORE Floor boards are protected from mechanical damage.
  3. A minimum of 50mm vertical KORE Floor strips should be placed at the floor perimeter prior to the installation of the boards to minimise thermal bridging, The strip should be deep enough to reach the top of the slab.
  4. KORE Floor boards are cut to size, if necessary, and laid with closely butted joints, staggered with a break bonded pattern and fitted tightly at the edges and around any service penetration.
  5. Electrical conduits, gas and water pipes or other services should, where possible be accommodated by ducting or channels within the concrete slab. The insulation must be protected from direct contact with hot pipes.
  6. Where reinforcing mesh is used in the slab the mesh should be fixed in position using galvanised spreader plates under the spacers, to avoid puncturing the DPM or radon barriers membrane.

  

Insulation Above the Slab

  1. When installing above the ground loor slab the floor slab should be level. The concrete floor over which the KORE Floor boards are to be laid should be left as long as possible to maximise drying out.
  2. The minimum of 50mm vertical KORE Floor strips should be placed at the floor perimeter prior to the installation of the boards to minimise thermal bridging. The strip should be deep enough to reach the top of the screed.
  3. KORE Floor boards are cut to size, if necessary, and laid with closely butted joints, staggered with a break-bonded pattern and fitted ttightly at the edges and around any service penetration.
  4. 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.

  

Suspended Timber Floors

Suspended _Timber_Floor.jpg

  1. When installing insulation between the joists of a suspended timber floor the KORE Floor boards should be cut to fit between the timber joists and supported by carriers. These may be nails part driven into the side of the joists at a selected level, timber battens or proprietary saddle clips.
  2. Where services need to be accommodated below the floor, KORE Floor boards can be lowered to provide an insulated duct.
  3. Install flooring grade chipboard, ply or softwood timber flooring directly into the joists fixing in the normal manner.
  4. Ensure that the void below the insulated suspended floor is well ventilated and that sleeper walls do not restrict the airflow.