Helifix InSkew Product Specification Calculator

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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.

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Helifix’s Approved Installers ensure customers can be confident that repairs are carried out using the latest techniques to obtain an efficient, reliable, cost-effective solution.

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