75mm Xtratherm Hyfloor XT/HYF Under Floor Insulation is an excellent tongue and grooved floor insulation board with a certified thermal conductivity (lambda value) of 0.021 W/mK which is suitable for use with underfloor heating.

Xtratherm Thin-R PLUS HYFLOOR XT/HYF has high compressive strength of 140kPa and very good thermal properties required to reach the high-performance floor insulation U-Values asked for in the Building Regulations.

The XT/HYF (T&G) tongue and groove jointing system offers a practical on-site solution that results in a more robust continuous layer of insulation, minimising the threat of thermal bridging.

Xtratherm Thin-R Plus XT/HYF (T&G) comprising a Polyisocyanurate (PIR) rigid foam core sandwiched between low emissivity gas tight reflective foil facings.

The product should be laid staggered in a break bonded pattern and fitted tightly at edges and around any service penetrations.

Xtratherm Hyfloor XT/HYF is a lightweight floor insulation board and suitable for use with underfloor heating.

The floor is an area with high risk of considerable downward heat loss when not properly insulated.

XT/HYF floor insulation board has been specifically designed to achieve lower U-Values under Building Regulations to be achieved with minimum thickness.

The XT/HYF PIR floorboard achieves an A + rating under the BRE Green Guide.

Specification:

Thickness: 75mm

Width: 1200mm

Length: 2400mm

Pack Quantity: 4

Pack Coverage: 11.52m2

Board Coverage: 2.88m2

Profile: T&G all four edges

R-Value: 3.55m2K/W

Thermal Conductivity: 0.021W/mK

Compressive Strength: >140 (kPa)

Reaction to Fire: E

Suitable for Underfloor Heating: Yes

Xtratherm Thin-R PLUS HYFLOOR XT/HYF Features:

 · Reduced Insulation Thickness.

 · Practical T&G jointing system.

 · Reduced thermal bridging.

 · Robust Tongue and Groove Jointing.

 · High Compressive Strength of 140kPa.

 · Suitable for Underfloor Heating systems.

 · Perimeter Strips for Robust Detailing.

 · Achieves an A + rating under the BRE Green Guide.

 · Designed to achieve lower U-Values under Building Regulations.

 · Thermal conductivity (lambda value) of 0.021 W/mK.

 · Provides a robust continuous layer of insulation.

 · Low emissivity gas tight reflective foil facings.

 · Suitable for solid and suspended floors.

HYFLOOR XT/HYF Xtratherm Floor Board Installation Guidelines Below Concrete Slab:

 · Lay and level the hardcore in layers 150mm min and 250mm max and compact well.

 · Sand blind base to create a level surface and to protect DPM.

 · The damp proof membrane (DPM), normally 1200g polythene or radon barrier, should be laid over the blinding, tape lapped joints to prevent passage of ground moisture.

 · Carry DPM up to the wall to meet and seal with the DPC course.

 · Lay the XT/HYF (T&G) across the DPM.

 · If two layers are required, lay the boards in a staggered jointed pattern.

 · Closely butt all edges.

 · Place Xtratherm Perimeter Strips (XT/STR) around the floor perimeter to provide robust detailing in order to reduce thermal bridging.

 · Ensure the top of the perimeter strip is level with top of floor finish.

 · Seal around any service penetrations.

 · Lay a thin gauge polythene sheet, to act as a separating layer, over the insulation with 150mm lap joints.

 · VCL should be taped at the joints to ensure a continuous separating layer, as per BRE GBG 45 “Insulating Ground Floors''.

 · If underfloor heating is required, lay pipes and clip to XT/HYF through the separating layer.

 · Follow Underfloor Heating manufacturer’s guidelines.

 · Pour and compact concrete slab to required finish floor level.

Xtratherm Thin-R PLUS Hyfloor XT/HYF Installation Guidelines Below Floor Screed:

 · Lay and level the concrete slab, allowing sufficient time to dry out, as per BS 8203.

 · Beam and block floors may need a levelling screed or grouting to ensure base level.

 · Refer to manufacturer’s guidelines.

 · The damp proof membrane (DPM), normally 1200g polythene or radon barrier, should be laid over the blinding, tape lapped joints to prevent passage of ground moisture.

 · Carry DPM up to the wall to meet and seal with the DPC course.

 · Lay the XT/HYF (T&G) boards across the DPM.

 · If two layers are required, lay the boards in a staggered jointed pattern.

 · Closely butt all edges.

 · Place Xtratherm Perimeter Strips (XT/STR) around the floor perimeter to provide robust detailing in order to prevent thermal bridging.

 · Ensure the top of the perimeter strip is level with top of floor finish.

 · Seal around any service penetrations.

 · Lay a thin gauge polythene sheet, to act as a separating layer, over the insulation with 150mm lap joints.

 · VCL should be taped at the joints to ensure a continuous separating layer, as per BRE GBG 45 “Insulating Ground Floors”.

 · If underfloor heating is required, lay pipes and clip to XT/HYF (T&G) through the separating layer.

 · Follow manufacturer’s guidelines.

 · Pour screed according to screed manufacturer’s guidelines.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 

*Special Product - Non returnable cancelable.