Flat roof insulation fixings for insulated plywood laminates

Price excl. VAT
Price incl. VAT
(25 items in stock)

Insofast flat roof nails for fixing Celotex or Kingspan 6mm plywood faced warm roof insulation boards. Fix insulation panels to rafters at spacings of 600 x 400mm centre. Thats just 6.9 / m2 / board.

Insofast roofing fixings have a spherical cap to enhance performance and a precise twist helical shank with a CSA 33% smaller than SureTwist products for reduced cold bridging and edge distance compliance. The zinc plated helical roofing fasteners are available in 6 sizes to suit a range of roof insulation panels including Kingspan or Celotex warm roof ply insulation boards. Use:

  •   95mm for   40 -  60mm insulation panels
  • 120mm for   65 -  85mm insulation panels
  • 145mm for   90 - 110mm insulation panels
  • 170mm for 115 - 135mm roofing boards
  • 195mm for 140 - 160mm insulations layers
  • 220mm for 165 - 185mm deep insulation

Zinc galvanised Flat Roof Nails are available in packs of 20 and boxes of 400

For fixing Celotex, Kingspan or Eco-therm insulation boards with Insofast galvanised warm roof fixings simply drive with a hammer. An SDS adapter is available for repetitive use.

Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alternatively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the responsibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.