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Thermal Windpost TWP2

Thermal Windpost TWP2

Thermal efficiency: the new revolution in windposts

The revolutionary Ancon Thermal Windpost (TWP2) is designed to span vertically between floors, to provide additional lateral support for panels of masonry. It has been specially designed and engineered after extensive research and testing, with a variety of features to improve the thermal performance and repeatability of the junction. 

With robust integral non-combustible mineral fibre insulation in combination with a thermal slot array, using the Thermal Windpost in place of a traditional windpost results in up to 70% reduction in thermal transmission through the span of the section, as well as  improving the consistency and repeatability of fitting insulation in and around the post, ensuring that the intended thermal design is met.

Although it holds the same strong performance, the patented Thermal Windpost is engineered to be up to 35% lighter than traditional windposts, making it much easier to handle on site. The teardrop hem increases the strength of the post and eliminates sharp edges, meaning that safety on site is also improved.

Ancon Thermal Windposts are designed to add thermally efficient lateral support to cavity walls where either wind loads are high, or the span between primary structural members is large. The hemmed leg of the windpost is built into the blockwork, and the blockwork tied through the leg of the windpost to minimise any possible movement or cracking of internal finishes. If a vertical movement joint is required in place of a tied joint, ties with a debonding sleeve on one side can be supplied.

For further information or advice on specific applications, please contact our Technical Services Team.

Connections and Ties

Connections to the frame can be made in a variety of ways and will depend on the type of structure & fixing used. Typical examples of connections are shown here.


Details for Specification and Ordering

The Ancon Thermal Windpost is UKCA and CE marked, designed to BS EN 1993 (EC3) and manufactured to BS EN 1090-1.

Ancon Windposts are designed and manufactured to suit each individual project. Sufficient time should be allowed for the design, approval and manufacturing process when placing orders for windposts.

Download and complete the windpost design sheet from this page and email to

Fixing Services

Please click here for details of companies that can provide 'supply-and-fix' and 'fix-only' services for Ancon windposts.


Building Information Modelling

A BIM Object of this product is coming soon to NBS Source.

Latest News

Leviat Launches New 300mm Type 4 Wall Tie for Wider Cavities

Leading construction accessories manufacturer, Leviat, announces the release of its new Ancon Staifix HRT4 300mm Wall Tie designed for use in wider walls with cavities ranging from 151-175mm. The addition of this product to the existing range will help specifiers and builders to meet the latest Part L regulations and achieve the more stringent U-values and building fabric requirements in the upcoming Future Homes Standard.