Kingspan Kooltherm Cavity Closers - All Sizes All Insulation
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Kingspan Kooltherm Cavity Closers - All Sizes


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Order now and get free delivery on all Kingspan orders over £300 ex vat.

The price shown is the price per length. 

Kingspan Kooltherm Cavity Closer is PVC–U extrusion with a fibre free rigid thermoset insulation core that maintains continuous insulation around window and door openings. It is suitable for use with timber, metal or PVC window frames and can also be supplied to order in curved sections.

For use with masonry wall openings in England & Wales only. For other construction types and regions, please contact Kingspan Insulation for further advice.


Kingspan Kooltherm® Cavity Closer is manufactured to the highest standards under a management system certified to ISO 9001: 2015 (Quality management systems. Requirements), ISO 14001: 2015 (Environmental Management Systems. Requirements), ISO 45001: 2018 (Occupational Health & Safety Management Systems. Requirements with guidance for use) and ISO 50001: 2018 (Energy Management Systems. Requirements with guidance for use).



  1. Thermal Conductivity (W/mK): 0.022 W/m.K
  2. Sheathing: PVC-U extrusion J-section
  3. Length: 2400mm


Length 2400mm
Thermal Conductivity 0.022 W/mK
Brand Kingspan
Material Type Phenolic
Sheathing PVC-U extrusion J-section

Est Delivery between and .

Delivery will always take place on a weekday (Mon - Fri).
For more information on delivery visit our delivery info page.

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