Insulated proprietary cavity closers for window and door reveals

CAVITY CLOSER 100MM pk of 10
Price incl. VAT
(Out of stock)

Easy-Trim Cavity Closers are a simple and effective method for closing cavities around openings in most forms of construction including Masonry , Timber Frame and Steel Frame system.

They are suitable for use in both new build and refurbishment projects. The Cavity Closers are a simple way to achieve Building Regulations compliance when closing cavities where the cavity widths are unkown.

Available in two profiles to suit cavity widths between 50 - 150mm.

  • Easy to install with a simple cut to size indicators.
  • Fully ridged plastic closer.
  • Effective in preventing cold bridging.
  • Can be used in both new build and refurbishment.
  • Reduces the risk of condensation , mould and moisture migrating accross a cavity.
  • Overcomes variation in cavity widths
  • Complies with both building regulations and British Standards.

Sizes available are 2.4m x 100mm and 2.4m x 150mm multi width cavity closer.

Can be installed in a variety of ways , Tack to the widow frame built in , Build in as work progresses and you can install after the reveal has been constructed by fixing the inner leaf using grab adhesive.

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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.