Insulation Fixings
Specialist stainless steel helical fixings for plasterboard laminates, flat roof insulation, pitched warm roof, and external wall insulation (EWI) systems.
Thor Helical specialist stainless steel helical fixings for plasterboard laminates, flat roof insulation, pitched warm roof, and external wall insulation (EWI) systems. All fixings are manufactured from Grade 304 or 316 stainless steel for corrosion resistance and long-term performance.
Fixing Insulated Plasterboard Laminates
Fire-resistant mechanical fixing for securing insulated plasterboard to brickwork and blockwork
Test Results
| Bar Diameter (mm) | Substrate | Minimum Embedment Depth (mm) | Mode of Test | Ultimate Load Capacity (N) |
|---|---|---|---|---|
| 7 | Masonry | 50 | Tension | 622* |
Fixings tested in brickwork as performance guidance.
*In-house testing only – on-site pull-out tests are required to evaluate substrate specific performance.
Fixing Flat Roof Insulation Sheets
Hammer-driven fixing that cannot be over-driven — restraining insulation sheets to timber substrate
Test Results
| Bar Diameter (mm) | Substrate | Minimum Embedment Depth (mm) | Mode of Test | Ultimate Load Capacity (N) |
|---|---|---|---|---|
| 7 | SC3 Timber | 35 | Tension | 1386* |
Fixings tested in SC3 timber as performance guidance.
*In-house testing only – on-site pull-out tests are required to evaluate substrate specific performance.
Fixing Pitched Warm Roof Insulation
Headless fixings secure counter battens to softwood rafters for sandwiched insulation
Fixing External Wall Insulation (EWI)
Fix EWI systems to brickwork or blockwork with circular head that clamps insulation boards
Test Results
| Bar Diameter (mm) | Substrate | Minimum Embedment Depth (mm) | Mode of Test | Ultimate Load Capacity (N) |
|---|---|---|---|---|
| 7 | Brickwork | 50 | Tension | 622* |
| 7 | Concrete | 40 | Tension | 581* |
*In-house testing only – on-site pull-out tests are required to evaluate substrate specific performance.
HeliCalc Software
For Super-7 Warm Roof Fixings, Thor Helical's HeliCalc software selects the appropriate fixing length and density using a BRE approved design method, calculating wind & snow loads to BS6399 Parts 2 & 3.
Thor Helical Additional Accessories
Fixing Insulated Plasterboard Laminates
Fixing Flat Roof Insulation Sheets
Fixing Pitched Warm Roof Insulation
Fixing External Wall Insulation (EWI)
Downloads
Full technical data, test results and installation guidance
ISF18 – Fixing Flat Roof Insulation Sheets
Ø7mm Helical Fixing with Ø18mm domed head for flat roof insulation sheets
ISF18A – Insulated Plasterboard Laminates
Ø7mm helical tie with Ø18mm concave head used to fasten plasterboard laminates to brickwork / blockwork
ISF35 / ISF60 – Fixing External Wall Insulation
Ø7mm helical bar used to secure external wall insulation systems to the outside of buildings
TH Super-7 – Fixing Pitched Warm Roof Insulation
Ø7mm helical nail for use in Warm Roof Construction