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Fasteners for Kingspan Topdek panel.


  • Unique head design for easy ‘one step fix’ installation. The foam remains in place after penetration so there is no need to fill the hole.
  • Large rigid head in a one piece fastener for maximum bearing force.
  • Precise cutting notches to cut the membrane without damaging thin steel purlins.
  • Rotationally symmetrical for balanced loading and directional stability.
  • 6.3 mm diameter for strength and greater loadings.



- For fastening membrane faced panels to light steel:

  • DF3-TD-6.3 x 30 – Optimized performance and superior pull out resistance for steel 1.2–3 mm thick.
  • DF3-TD-6.3 x 30 – Suitable for a wide range of steel thicknesses from 1.2–6 mm, including purlin sleeves.

- For fastening membrane faced panels to heavy steel 4–12 mm thick:

  • DF12-TD-6.3 x 45.

- For fastening membrane faced panels to timber purlins:

  • DFT-TD-6.5 x 50.

- For fixing Topdek flashing material into the crown of the base sheet:

  • CLS-5.2 x 125.
  • CLS-5.2 x 150.
  • CLS-5.2 x 175.


A wide range of filler blocks, tapes and sealants are available to complement the range of fasteners – consult manufacturer's literature for further details.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-50-15/350 Rivets

Product specification

An important note about specifying



Fixfast Ltd


+44 (0)1732 882387

Product reference

TopDeck Fasteners


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Manufacturer details

Merlin House,
Seven Mile Lane,
Borough Green,
Kent, TN15 8QY
Tel +44 (0)1732 882387
Fax +44 (0)1732 885532
NBS Plus