Premium High Load Thermal Insulation Boards are designed for basement waterproofing systems and below-ground applications where thermal performance, moisture resistance and compressive strength are essential.
With a 50mm thickness and a design thermal conductivity of 0.034 W/mK, these boards provide effective thermal insulation for suitable basement and below-ground construction projects. Their high compressive strength makes them suitable for applications where insulation must withstand significant loads, subject to the project specification.
The boards feature a 15mm shiplap edge to help achieve a closer fit between adjoining boards and are designed for use within compatible waterproofing and insulation systems.
50mm thick thermal insulation boards
High compressive stress resistance of 500 kN/m² at 10% deformation
Design thermal conductivity of 0.034 W/mK
Long-term water absorption of less than 1% by volume
15mm shiplap edge for improved board-to-board fitting
Suitable for specified basement waterproofing and below-ground insulation applications
Supplied in packs of 8 boards
Pack coverage: 5.76sqm
| Property | Standard | Value |
|---|---|---|
| Board thickness | — | 50mm |
| Nominal dimensions | — | 1200 × 600mm |
| Effective dimensions | — | 1185 × 585mm |
| Edge treatment | — | 15mm shiplap edge |
| Compressive stress at 10% deformation | EN 826 | 500 kN/m² |
| Compressive creep (50 years at 2% deformation) | EN 12087* | 225 kN/m² |
| Design thermal conductivity | EN 10456 | 0.034 W/mK |
| Long-term water absorption by total immersion | EN 12091 | Less than 1% by volume |
| Coefficient of thermal expansion | — | 0.07 mm/mK |
| Maximum working temperature | — | 75°C |
| Pack quantity | — | 8 boards |
| Pack coverage | — | 5.76sqm |
Wykamol High Load Thermal Insulation Boards can be incorporated into suitable basement waterproofing and below-ground insulation systems where the specified thermal and compressive performance requirements are met.
Always follow the manufacturer's installation instructions and confirm compatibility with the selected waterproofing system and the expected loading conditions before installation.
Below is the standard tariff for guidance purposes.
Actual costs will be confirmed at point of sale and any variances you will be notified within 24 working hours of receipt of order
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We offer free next-day delivery for all orders over £150 (ex VAT) (UK Mainland Only).
Next day delivery is available for orders placed before 2pm Monday - Friday (working days). Delivery will be made on the next working day.
For orders placed before 2pm on a Friday, delivery will be made on the following Monday. For orders placed after 2pm on a Friday and over the weekend, delivery will be made on the following Tuesday. For orders placed on a Bank Holiday, goods will be dispatched on the next working day (e.g goods will be dispatched on the Tuesday for delivery on Wednesday).
These delivery options are available at an extra charge. Delivery prices are shown at checkout stage. Orders need to be placed before 2pm Monday - Friday (working days) for delivery on the following working day.
By placing an order on our website, you acknowledge and accept that delivery times are estimates and may be subject to delays due to various factors beyond our control, including, but not limited to, weather conditions, transportation issues, or other unforeseen circumstances. While we make every effort to ensure timely delivery, we cannot guarantee specific delivery dates.
If there are significant delays, we will do our best to keep you informed.
Thank you for your understanding and patience.
You have 14 days from the date of purchase to notify us you wish to return your items and receive a full refund (ex. delivery and card fees) in line with our terms and conditions. Please email us to request a return at sales@twistfix.co.uk