Ancon Staifix-Thor Helical Super-7 helical nails fix counterbattens to rafters, without compressing the layer of insulation in-between. 

Super-7 nails fix counterbattens to rafters and install flush to the timber. They are manufactured from stainless steel and are engineered with the precise Thor-Helical patented helix, and so provide maximum corrosion resistance and excellent holding power. The nails can be used in line with NHBC standards.

Note: We recommend a minimum counter batten thickness of 38mm.

Super-7 Alignment Tool 

This innovative tool vertically aligns and centres a nail on the counterbatten to rafter arrangement, improving build quality. 

• Two widths to accomodate 38mm and 50mm counterbattens
• Top, with level to ensure correct angle of entry

Recommended Super-7 Nail Length and Fixing Centres

This information should be calculated using HeliCalc, a free web-based program which calculates the length, density and quantity of Super-7 nails required for a specific project.

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