440mm x 215mm x 300mm Thermalite T&G Trench Block 3.5N
Close cookie info
Don’t show this message again

This website uses cookies to store information on your computer. To give you the best possible user experience we use cookies on our website. Read more about the cookies we use in our privacy policy.

440mm x 215mm x 300mm Thermalite T&G Trench Block 3.5N

Product Code: B020493

(per TN ex VAT)
(inc VAT)

Thermalite Trenchblock is a tried and tested, economical alternative to the construction of cavity walls with concrete infill, engineering bricks or heavy aggregate blocks for foundations.

Key Features
- For use in soils of up to Design Sulfate Class DS 4
- Available with tongue and groove joints and handholds
- Improves thermal performance
- Eliminates the need to mortar perpends

- Foundations

Face Dimension
440 x 215mm

Block Thickness

Block Weight


Thermal Conductivity
0.15W/m.K (Above DPC), 0.24W/m.K (Below Ground)


+ more

You must be logged in to leave a review.

View more... Foundation Blocks

Item(s) Price: £3.54

Add For Collection

Add For Delivery

View more... Foundation Blocks
complete the job with


Glass Wool