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InSkew

High performance timber fixing for pitched warm roof construction

Designed specifically for use in warm roof construction, high performance InSkews are hammer or power driven through battens, counterbattens and insulation, without affecting its thermal properties, and into the rafters. Their self-tapping design produces excellent holding power in both tension and compression and they are structurally more reliable, due to their helical profile, and more economical than traditional nails as far fewer are required.



Part 'L' Compliance

Since the publication of Building Regulations Part L, 2006, the new ‘u’ values for pitched warm roofs, where the insulation is above the rafter, is 0.18 – 0.20 W/m2K. Warm roofs, used to maximise living space and constructed using InSkews, have been shown to comply with these latest Part L Building Regulations.


Warm Roof Benefits

Compliance with Building Regulations - Part L
Reduces heat loss and retained heat gain
Lagging of pipes and tanks eliminated
Reduces running costs
No cold bridging
Protection against damp and corrosion
Roof tile ventilation no longer required
Produces a Room-in-a-Roof space


  • Free in-house design service available with a rapid response
  • Written specifications covered by Helifix Professional Indemnity insurance
  • Designed to withstand the structural loads – both the roof weight and wind suction. 
  • High performance – fewer fixings required. 
  • Excellent holding power in both tension and compression. 
  • Prevents compression of insulation and does not impair its thermal performance. 
  • Hammer or power driven normally without pre-drilling. 
  • Recommended by leading insulation manufacturers. 
  • Self-tapping action avoids batten bouncing and splitting of timbers. 
  • Headless, flush fixing for minimal cold bridging and heat transfer.
  • Full technical data available: Independently tested by TRADA.

InSkew recommendations

The following insulation manufacturers recommend InSkew and specify it in their BBA certification. 

  • Celotex – GA 3000 
  • Dow – Styrofoam, RL & PR 
  • Ecotherm – Pitched roof board 
  • Kingspan – TP10 
  • Knauf – Polyfoam 
  • Rockwool – Rockfall 
  • Springvale – Platinum Warmsqueez 
  • Vencel Resil – Jablite 
  • Xtratherm – Pitched roof board

Visit our downloads section for further detailed information