SUSPENDED TIMBER FLOOR

How To Install

Suspended Timber Floor

Fitting floor directly onto the joists -

Start at the edge of the wall, leaving an overlap of the product folded up the wall. Roll the SuperFOIL out over the joists.

To create an air cavity, SuperFOIL should be secured to the side of the joist, approx. 50mm from the top of the joist. Secure using the correct size staples (see chart) and batten if appropriate. Continue rolling the SuperFOIL out, when at the next joist, fix into place using the above method. Once fixed into place, roll the SuperFOIL up and over the joist, and then continue in this manner, creating air cavities between joists across the entire floor.

Lengths should be butt jointed on top of the joist and stapled securely into place. If using more than one length

Seal all joints using SuperFOIL 100mm tape. At the perimeter, trim SuperFOIL around the joists and seal to either the wall plate or the Cavity wall insulation if present.

Finish the insulation by taping any tears and/or cuts.

Continue to install your chosen flooring to manufacturers recommendation.

 

If you are battening out before fitting finished floor –

 

Start at the edge of the wall, leaving an overlap of the product folded up the wall. Roll the SuperFOIL out over the joists.  Whilst rolling out the product, ensure that the product is being held taut whilst stapling into place at 50mm-100mm intervals.

Lengths should be butt jointed on top of the joist and stapled securely into place.

Ensure all joints, tears and holes are sealed with SuperFOIL 100mm tape to ensure an airtight finish.

To finish the installation, batten the product using the correct size battens ( see chart), before placing your internal flooring finish.

Dachausbau, Wärmeschutz, Dachkammer
ProductMinimum Batten SizeStaple Size Required
SF19+38mm20mm
SF4050mm30mm
SF6063mm40mm

Ideal Products For Internal Applications

SF19+-3

SuperFOIL SF19+

  • 2.53 R VALUE

    R Value of 2.53 When used in a roof

  • 45mm THICK

    1.5m Wide by 10m Long

SF40-3

SuperFOIL SF40

  • 3.7 R VALUE

    R Value of 3.7 When used in a roof

  • 65mm THICK

    1.5m Wide by 10m Long

SF60-3

SuperFOIL SF60

  • 4.48 R VALUE

    R Value of 4.48 When used in a roof

  • 100mm THICK

    1.5m Wide by 8m Long

Choose Your Solution

Use the charts below to find the ideal combination of insulations for your project

Internal Wall - Diagram2
SuperFOIL Product Below Rafters SuperFOIL Product Above Rafters
No Additional Insulation SF19BB SF40BB
No Additional Insulation N/A 0.41U 0.26U
SF19+ 0.34U 0.26U 0.20U
SF40 0.26U 0.17U 0.14U
SF60 0.20U 0.14U 0.12U
SuperFOIL Product Mineral Wool / Glass Fibre / Sheeps Wool - 0.044W/mK
No Additional Insulation 25mm 50mm 75mm 100mm 125mm 150mm 175mm 200mm 225mm 250mm 275mm 300mm
SF19+ 0.34U 0.29U 0.25U 0.23U 0.20U 0.19U 0.17U 0.16U 0.15U 0.14U 0.13U 0.12U 0.12U
SF40 0.26U 0.23U 0.20U 0.19U 0.17U 0.16U 0.15U 0.14U 0.13U 0.12U 0.12U 0.11U 0.10U
SF60 0.20U 0.19U 0.17U 0.16U 0.15U 0.14U 0.13U 0.12U 0.11U 0.11U 0.10U 0.10U 0.09U
SuperFOIL Product Mineral Wool / Glass Fibre / Sheeps Wool - 0.037W/mK
No Additional Insulation 25mm 50mm 75mm 100mm 125mm 150mm 175mm 200mm 225mm 250mm 275mm 300mm
SF19+ 0.34U 0.28U 0.24U 0.22U 0.19U 0.17U 0.16U 0.15U 0.14U 0.13U 0.12U 0.11U 0.11U
SF40 0.26U 0.22U 0.20U 0.18U 0.16U 0.15U 0.14U 0.13U 0.12U 0.11U 0.11U 0.10U 0.10U
SF60 0.20U 0.19U 0.17U 0.16U 0.15U 0.14U 0.13U 0.12U 0.11U 0.11U 0.10U 0.10U 0.09U
SuperFOIL Product Mineral Wool / Glass Fibre / Sheeps Wool - 0.032W/mK
No Additional Insulation 25mm 50mm 75mm 100mm 125mm 150mm 175mm 200mm 225mm 250mm 275mm 300mm
SF19+ 0.34U 0.28U 0.24U 0.21U 0.18U 0.16U 0.15U 0.14U 0.13U 0.12U 0.11U 0.10U 0.10U
SF40 0.26U 0.22U 0.19U 0.17U 0.16U 0.14U 0.13U 0.12U 0.11U 0.11U 0.10U 0.09U 0.09U
SF60 0.20U 0.18U 0.16U 0.15U 0.13U 0.12U 0.12U 0.11U 0.10U 0.10U 0.09U 0.09U 0.08U
SuperFOIL Product PIR Foam Board - 0.022W/mK
No Additional Insulation 25mm 50mm 75mm 100mm 125mm 150mm 175mm 200mm 225mm 250mm 275mm 300mm
SF19+ 0.34U 0.26U 0.21U 0.18U 0.16U 0.14U 0.13U 0.12U 0.11U 0.10U 0.09U 0.09U 0.08U
SF40 0.26U 0.21U 0.18U 0.16U 0.14U 0.12U 0.11U 0.10U 0.10U 0.09U 0.08U 0.08U 0.07U
SF60 0.20U 0.17U 0.15U 0.13U 0.12U 0.11U 0.10U 0.09U 0.09U 0.08U 0.08U 0.07U 0.07U
SuperFOIL Product Phenolic Foam Board - 0.019W/mK
No Additional Insulation 25mm 50mm 75mm 100mm 125mm 150mm 175mm 200mm 225mm 250mm 275mm 300mm
SF19+ 0.34U 0.25U 0.21U 0.17U 0.15U 0.13U 0.12U 0.11U 0.10U 0.09U 0.09U 0.08U 0.08U
SF40 0.26U 0.21U 0.17U 0.15U 0.13U 0.12U 0.11U 0.10U 0.09U 0.08U 0.08U 0.07U 0.07U
SF60 0.20U 0.17U 0.15U 0.13U 0.12U 0.10U 0.10U 0.09U 0.08U 0.08U 0.07U 0.07U 0.06U

FIXING DETAILS

Floor Junction

At the floor junction, overlap the SuperFOIL onto the floor substrate and seal with SuperFOIL Foil Tape and mastic where possible to ensure an airtight finish. 
Fix the product with timber battens installed around the perimeter of the floor. 

Ceiling Junction

At the ceiling junction, overlap the SuperFOIL onto the ceiling and seal with SuperFOIL Superior Foil Tape and mastic where possible to ensure an airtight finish.
Fix the product with timber battens around the perimeter of the ceiling. 

Pipes,Vents & Holes

At penetrations such as vent ducting, pipework etc, SuperFOIL should be trimmed to ensure there are no gaps around the penetration.
Using 100mm Superior Foil Tape ensure the SuperFOIL is well sealed around the penetration to create an airtight barrier. This can be achieved by using small sections of tape and working around the penetration.

Window & Door Detail

Install SuperFOIL using the correct method for your application.
To finish installation around windows & doors, simply trim the SuperFOIL up to the frame and staple the insulation to the surrounding framework where possible.
Finish installation by sealing all joints with SuperFOIL 100mm Foil tape. 

Attach SuperFOIL to rafters using correct method for your application.
At the purlin, cut the SuperFOIL to the correct length to be able to be passed underneath the purlin with a small amount of product on the opposite side.
Join the next piece of insulation, ensuring to tape the joint with SuperFOIL 100mm foil tape.
Finish the installation by installing counter battens directly on top of the SuperFOIL to the rafters.

Install SuperFOIL using correct method for your application.
To finish installation around skylights or Dormer windows, simply trim the SuperFOIL up to the frame and staple the insulation to the surrounding framework where possible.
Finish installation by sealing all joints with SuperFOIL 100mm Superior foil tape.

UNSURE WHERE TO START?

Our FREE guide gives you all the information on saving time and money when insulating your home, and how to really make a difference to the comfort of your rooms.

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