Super 8 Thor HEADED Helical Nail for Flat Roofs

The Super 8 Thor Headed Helical Nail is a specialist fixing for flat and warm roof construction, engineered specifically to fasten counterbattens to rafters across an insulation layer without crushing or compressing it. That last bit matters more than it sounds. Compress the insulation and you lose the thermal performance you just paid to install. These nails are designed to bridge that gap cleanly, landing flush with the timber on both sides.

Manufactured from stainless steel and formed with the patented Thor-Helical helix profile, the Super 8 Thor headed helical nail delivers genuine holding power rather than just relying on friction alone. The helical shank bites into timber as it drives, which means it resists withdrawal far better than a smooth or even ring-shanked equivalent. On a flat roof, where differential movement and wind uplift are constant long-term concerns, that kind of pull-out resistance is worth having.

Where Super 8 Thor Headed Helical Nails Fit Into Roof Construction

These nails are used across new build and refurbishment roofing projects wherever counterbattens are being fixed over insulation to rafters. The headed design ensures the batten cannot pull over the fixing under load, and the stainless steel construction means there is no corrosion risk in a roof environment where trapped moisture is always a possibility. They are manufactured in line with NHBC standards, which keeps things straightforward on warranty-backed new build sites.

Available in three lengths: 145mm, 170mm, and 195mm. The right size depends on your combined batten and insulation depth, so it is worth working this out before ordering rather than after. As a rough guide, you want the nail to achieve solid penetration into the rafter beyond the insulation layer, so measure carefully and size up if you are in any doubt.

Stainless steel throughout, NHBC-compliant, and built around a proven helical profile. If you are fixing counterbattens over insulation on a flat roof, this is the correct tool for the job.