Kingspan Kooltherm Cavity Closer

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Pay in 3 prices shown are an example only. Total calculated at checkout.

Delivery within 5 - 7 working days

Free Delivery On Orders
Over £599.95 Ex-Vat

Need something quicker?

Contact us on 0300 303 4578
or email here!

Available in packs of 10

Kooltherm Cavity Closer stands as a cutting-edge solution tailored for the specific building regulations and climate conditions of England and Wales.

This product features a uPVC extrusion with a premium performance, fibre-free rigid thermoset phenolic core, making it an ideal choice for effectively closing cavities around openings in masonry cavity walls. Its superior thermal conductivity of 0.022 W/mK ensures improved insulation, minimising heat transfer, condensation risk, and mould growth around window and door openings.

Features and Benefits

  • Region-Specific Design: Exclusively for use in England and Wales, Kooltherm Cavity Closer meets the unique regulatory and environmental demands of these regions, providing a tailored insulation solution.

  • Enhanced Thermal Efficiency: With its inhibited heat transfer capabilities, it significantly reduces thermal bridging, thereby lowering the risk of condensation and mould growth, and improving the overall energy efficiency of buildings.

  • Weather Resistant: Acting as an integral damp proof course (DPC), it offers exceptional resistance to weather, ensuring durability and longevity of window and door installations.

  • Versatile Installation: Can be seamlessly fitted with door or window frames as a combined unit, streamlining the installation process and ensuring a perfect fit to prevent energy loss.

Application Areas

Kooltherm Cavity Closer is specifically designed for insulated cavity closures in masonry wall openings, providing an efficient method for addressing thermal and moisture-related issues around windows and doors in new builds and renovations.

Technical Specifications

  • Length: Available in 2,400 mm sections.
  • Available Widths: A wide range of widths from 50 mm up to 150 mm, with the ability to join sections for cavity widths up to 300 mm.
  • Material: Features a uPVC extrusion with a fibre-free rigid thermoset phenolic insulation core, combining durability with high-performance insulation.

Kooltherm Cavity Closer is your go-to choice for optimising the thermal performance of masonry cavity walls around openings. By reducing thermal bridging and enhancing moisture resistance, it contributes to the overall energy efficiency and longevity of buildings in England and Wales.


Kingspan Kooltherm Cavity Closer Brochure


Order Value Delivery Charge
Up to £200.00 ex-vat £100.00 ex-vat
£200.00 - £599.95 ex-vat £59.95 ex-vat
Above £599.95 ex-vat Free Delivery


Weekend Delivery
Available upon request


Parcel Rates
Delivery charge may vary depending on quantity and volume of your order.
Pricing will be calculated during checkout.


Local Delivery Charge
Within 35 miles of Postcode S63 9BL - Up to £500.00 ex-vat
Delivery Charge £35.00 ex-vat
Please contact us to arrange collections
Tel: 0300 303 4578 | Email:


Delivery charges will automatically be calculated within the checkout process.
Orders are only processed for delivery between 8.00am - 5.00pm Monday to Friday excluding bank holidays.
Moffett offload will be used for large bulky deliveries and only when agreed with you.
Please advise of any access issues on ordering.
Delivery is Kerbside only.
In the unlikely event that your delivery is not correct or damaged please notify us immediately and mark any issues on the delivery slip.


    Where We Deliver

    Delivery Areas

    We have a fleet of FORS delivery vehicles all with Moffett mechanical off loads that deliver nationwide. Sometimes we may use 3rd party carriers for smaller orders.


      Product Delivery Times

      The vast majority of our orders are dispatched within 3 working days, this can however be up to 5 working days, please contact us if you require something urgent.
      Speciality items may take up to 5-7 working days.
      We will contact you with in 24/48hrs of your order been placed to confirm delivery times and dates.

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