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Inskew Product Specification Calculator

TITLE*
FIRST NAME*
SURNAME*
COMPANY*
POSTCODE*
JOB TITLE*
TELEPHONE*
EMAIL*
FULL PROJECT ADDRESS*
PROJECT STATUS
COUNTER-BATTEN THICKNESS The counter-batten must be a minimum of 25mm; if this is not possible contact the Helifix Sales Office.
COUNTER-BATTEN CENTRES This is the counter-batten spacing and is usually the same as the rafter centres
RAFTER TYPE Softwood, Redwood, Oak etc
INSULATION THICKNESS The thickness of the insulation above the rafters that is to be fixed through - some insulation is rebated or between the rafters
ADDITIONAL MATERIAL THICKNESS Sometimes, other materials such as ply or plasterboard are placed between the insulation and the rafters
ROOF PITCH This is needed in order to calculate the sliding load. You can round this figure up or down to the nearest 10˚
LAID WEIGHT OF TILES - KILOS PER M² This is needed in order to calculate the sliding load. At best we need to know the laid weight in kg/m², at worst the name of the slate/tile to be used
ALTERNATIVE MAKE / MODEL OF TILE
WIND EXPOSURE What county is the site in?
WOULD YOU CONSIDER ITS EXPOSURE TO THE WIND Take into account if the site is in town, on top of a hill, near the coast etc.
IS THE BUILDING HEIGHT OVER 15 METRES?
WHAT IS THE AREA OF THE ROOF? This is needed to calculate the total number of fixings required. Please specify in m².

*Mandatory

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