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Pitched Roof - Under Rafter

SF19+

Pitched Roof Under

Rafter Solutions

SF19+-table1

SF19+ Combined With...

(Pitched Roof - Under Rafters @ 400mm Centres)

SF19+-table2

SF19+ Combined With...

(Pitched Roof - Under Rafters @ 600mm Centres)

SF19+-table3

SF 40

Pitched Roof Under

Rafter Solutions

SF40-table1

SF40 Combined With...

(Pitched Roof - Under Rafters @ 400mm Centres)

SF40-table2

SF40 Combined With...

(Pitched Roof - Under Rafters @ 600mm Centres)

SF40-table3

SF 60

Pitched Roof Under

Rafter Solutions

SF40-table1

SF60 Combined With...

(Pitched Roof - Under Rafters @ 400mm Centres)

SF40-table2

SF60 Combined With...

(Pitched Roof - Under Rafters @ 600mm Centres)

SF40-table3
  • CERTIFIED HIGH PERFORMANCE

  • SUITS ALL BUILD TYPES

  • QUICK AND EASY TO INSTALL

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Fixing Instructions

Pitched Roof - Under Rafter

SuperFOIL is installed tight under the pitched roof timber rafters, from the ridge to the eaves, using the correct size galvanized or stainless-steel staples at 300mm intervals. See table for correct sizes.

Care should be taken to ensure overlaps are at least 50 mm and taped over with 100 mm Superior Foil Tape.

The sealing of the joints around openings such as windows, pipes and ventilation ducts should be completed with 100 mm Superior Foil Tape to maximise the vapour tightness. Particular attention should be paid to the fastening of any penetrations through the products.

At eaves, the products should be trimmed, stapled and then then sealed with 100 mm Superior Foil Tape to the timber wall plate.

The products are then further held in place by the correct size timber battens installed horizontally at no greater than 600 mm centres. Additional timber battens are installed around windows or sky lights.

Where necessary, 100 mm Superior Foil Tape should be applied to any tears, cuts or joints.

SuperFOIL Under Rafter Install

Plasterboard is then fixed to the timber battens in accordance with the manufacture’s guidance.

Where required, install additional insulation at the desired thickness between rafters in accordance with the manufacture’s guidance, ensuring cavities are left both above and below the SuperFOIL to the recommend depths for the product. See table for correct depths.

Additional layers of SuperFOIL or insulated plasterboard can be used to remove the need for insulation between rafters, for bespoke u-value calculation contact technical@superfoil.co.uk.

Installation Details

Roof to Wall Detail

When connecting SuperFOIL to plaster finished, brick or block walls, dress SuperFOIL approx. 50mm onto the wall. Fold back the SuperFOIL and apply sealant as a continuous 8mm bead under the edge of the folded back SuperFOIL. Apply the SuperFOIL to the sealant and tape over with 100mm Superior Foil Tape

Diagram-2

Ridge Detail

At the ridge install the SuperFOIL along or down the rafters starting at the ridge ensuring the SuperFOIL overlaps the ridge beam. Fix SuperFOIL to the ridge beam with staples. Complete the first section of roof. When installing the opposing side of roof, start at the ridge ensuring the SuperFoil overlaps the ridge beam and previously installed SuperFOIL by a minimum of 50mm, secure in place with staples and seal the joint with 100mm Superior Foil Tape.

Diagram-3

Eaves Detail

At eaves, the SuperFOIL should be trimmed with sufficient material to overlap the timber wall plate. The SuperFoil should be stapled and then sealed with 100 mm Superior Foil Tape to form an airtight seal to the wall plate. If sealing to plaster finish, brick or block fold back the SuperFOIL and apply sealant as a continuous 8mm bead under the edge of the folded back SuperFOIL. Apply the SuperFOIL to the sealant and tape over the joint
with 100mm Superior Foil Tape.

Diagram-4

Dwarf Wall Detail

At the dwarf wall continue the SuperFOIL down the studs to the floor joists sealing to base of dwarf wall to ensure air tightness. The products are then further held in place by the correct size timber battens installed horizontally at no greater than 600 mm centres.

Diagram-5

Fixed Between Purlins Detail

Fix SuperFOIL to the rafters ensuring at the Purlins the SuperFOIL is dressed up the purlins and stapled in place, To create an airtight seal use 100mm Superior Foil Tape. The products are then further held in place by the correct size timber batten installed horizontally creating a tight seal between the SuperFOIL and purlins.

Diagram-1

Fixed Behind Purlins Detail

Fix SuperFOIL to the rafters, at the Purlins the SuperFOIL should be cut and dressed behind the purlins. Use 100mm Superior Foil Tape to seal the SuperFOIL to the rafters and purlins to ensure an airtight seal. The products are then further held in place by the correct size timber batten installed horizontally in the usual manner.

Diagram-White-Background

Roof Windows Details

To finish SuperFOIL around Skylights or Dormer Windows trim the SuperFOIL up to the frame. where possible staple the SuperFOIL to the surrounding framework and seal to the skylight or window using 100mm Superior Foil Tape.

Penetration Details

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.