KORE_Lock_copy.jpg

KORE LOCK INSTALLATION GUIDELINES

Installation Guidelines: Warm Pitched Roof - Insulation Between and Above the Rafters

KORELock_Warm_Roof_Application_02.jpg
  • Before Fitting the KORE Warmsark sheet a preservative treated stop rail must be fitted to the rafters at the eaves
  • KORE Warmsark sheets are fitted across the line of the rafters, with the tongue and groove tightly fitted together. All sheet joints running from the eaves to the ridge must occur over the rafters
  • Ensure the insulation is continued at the ridge of the roof
  • The tongue and groove on the sheet ensures boards are tightly fitted and therefore taping the joists is not required
  • The KORE Lock sheet can be fitted from the outside (before the Warmsark board is fitted)
  • When fitting from the outside, commence by fitting the KORE Lock sheets between the rafters. When in position the sheet will expand to fill the rafter space completely. The sheet will not require fittings to stay in place
  • The KORE Lock sheets must be flush with the outside of the rafter to ensure there is no air movement between the KORE Lock and the KORE Warmsark sheet
  • Where KORE Lock sheets need to be cut to fit between the rafters, sarking clips should be used to secure the insulation in place. Sarking clips must be to the correct size to ensure the KORE Lock sheet is flush with the outside of the timbers
  • Sheets should be closely butted together. Where rafters are cut in such a design that it makes fitting a ridge insulation difficult, causing small gaps in the insulation, it is necessary to fill the space with a flexible insulation material
  • When fitting KORE Lock from the inside the same fitting instructions apply, except, if necessary, sheets are secured in place with timber stop battens

Installation Guidelines: Cold Pitched Roof - Insulation Between and Under the Rafters

  • When fitting KORE Lock sheets it is important to ensure a 50mm air space is maintained between the insulation sheet and the roof finish. This gap can be reduced where a breathable membrane is installed. Please follow the instructions of the membrane manufacturer on the appropriate air space to leave
  • Commence by fitting the KORE Lock sheets between each rafter, following the completion of the roof cladding. The KORE Lock sheet will compress slightly to allow the sheet to be fitted between the rafters. When in position the sheet will expand to fill the rafter space completely. The sheet will not require fittings to stay in place
  • Keep sheets flush with the underside face of the rafter and closely butted at ends. This is to ensure that the necessary clear air space between the insulation and the membrane/sarking felt is maintained
  • Fix the first row of KORE Lock sheets to roof line at junction with vertical stud walls, beginning with the first slot. Repeat the procedure until the entire area is insulated
  • Where rafter width vary and sheets need to be cut to fit, the sheets may need to be secured into position with timber stop battens
  • Continue installation of KORE Lock panels to vertical studding and ceiling collars until completed
  • Sheets should be closely butted together. Where rafters are cut in such a design that it makes fitting ridge insulation difficult, causing small gaps in the insulation, it is necessary to fill the space with a flexible insulating material
  • Apply KORE Thermal Board to the underside of the rafters with suitable fixings, ensuring all joints are tightly sealed. Face with minimum 500 gauge polyethylene vapour barrier 
Airlock-Cold-Roof-Application.jpg

Installation Guidelines: Dwarf Wall

  • KORE Lock sheets should be friction fitted between the timber studding flush with the inside surface of the studs. This will prevent the risk of air movement between the sheets and the thermal plasterboard
  • To achieve greather thermal performance KORE EPS sheets can be fitted to the back of the studs using suitable fixings. The EPS sheets should be fixed directly to the timber studs
  • Apply KORE Thermal Board to the inside surface of the studs with suitable fixings, ensuring all joints are tightly sealed. Face with minimum 500 gauge polyethylene vapour barrier

Cutting and Packaging

On-site trimming of boards where necessary to maintain continuity of insulation is easily executed using a fine tooth saw or builder's knife. Care must be taken to maintain the thickness, flatness and squareness of the board to achieve close butting of joints and continuity of insulation.

KORE Lock insulation boards must be protected from prolonged exposure to sunlight, and should be stored under cover in its original wrapping, not in contact with ground moisture and raised above ground level. Care must be taken to avoid contact with solvents and with materials containing volatile organic components such as tar and newly treated timber.

Additional technical information can be found in the KORE Lock Insulation Design Guide or by joining the KORE Resource Centre.

KORE Loft Roof Insulation Quotation Request

You may request a detailed quotation by submitting your plans directly through our website. You do not need to send us your plans or building details if you simply want a m² price. Click on the button below to request a quotation.

 

Request a Quote