High performance Interlocking basement floor insulation boards

Danopren 500 TL
(Out of stock)

Floor Insulation

Danopren 500 TL is 50mm deep, high performance thermal insulation board typically used in basements and other areas that are susceptible to water accumulation on the floor.  The insulation is made from extruded polystyrene (XPS) having deep drainage channels formed on one side of the board

The tight closed cell structure of XPS foam provides excellent compressive strength and exceptional resistance to the absorption of water.  The shiplap edges allow each board to overlap and fit neatly together to form a watertight layer, making it the ideal floor insulation product to use as part of a basement water­pro­ofing system.

Installing Insulation on Basement Floors

The rigid foam panels form an insulated layer when installed across basement slabs and adjacent to basement drainage channels, providing stable long-term support for cavity drain flooring membranes in Type C tanking appli­cations.

The 0.75 square metre sheets are quick and simple to lay and to trim.  Boards should be laid in the style of laying bricks and all joints should be taped.  When used for insulating basement floors or other bases that may be subject to flooding, it is recommended to secure each board to the concrete slab using mechanical anchor at the rate of 5 fixings to each board with no fixing placed within 50mm of the board edge or 150mm from its corner.

Board dimension: 1250mm x 600mm x 50mm – supplied in packs of 6 square metres (8 boards per pack) and sold in lots of 4 packs (24 m2), 6 packs (36 m2), 8 packs (48 m2) and 10 packs (60 m2).

There are no reviews yet.

Write a review

    Overall satisfaction
    Value for money
    Ease of use

Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alter­natively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alter­natively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the respon­sibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.