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50mm Claylite Clay Heave Protection EPS Kay-Metzeler

50mm Claylite Protection Against Soil Movement - Foundation Insulation EPS Kay-Metzeler - 2.4 x 1.2
50mm Claylite Protection Against Soil Movement - Foundation Insulation EPS Kay-Metzeler - 2.4 x 1.2
50mm Claylite Protection Against Soil Movement - Foundation Insulation EPS Kay-Metzeler - 2.4 x 1.2
50mm Claylite Protection Against Soil Movement - Foundation Insulation EPS Kay-Metzeler - 2.4 x 1.2
50mm Claylite Clay Heave Protection EPS Kay-Metzeler
  • Foundation Protection EPS
  • Board coverage: 2.88m2
  • Claylite can be used on both faces of the beam.
  • Compressible fill low density expanded polystyrene boards.
  • Protection for foundations against soil movement
Estimated delivery:
In Stock
£ 33.17
Ex VAT: £ 27.64
  • Brand: Kay-Metzeler™
  • Model: 50mm Claylite
  • Dimensions: 2,400mm x 1,200mm x 50mm
  • SKU: 50mm
  • Product code: P1-300
  • MPN: 50mm-KM-Clay-lite

Options available

50mm Claylite Kay-Metzeler Clay Heave Protection Against Soil Movement is a low-density, compressible-fill expanded polystyrene material designed to absorb movement between ground and concrete foundations to alleviate pressure on structures caused by clay heave or shrinkage.

Kay-Metzeler Claylite 2400mm x 1200mm is a green coloured EPS void-fill product suitable for standard applications in ground beams, even sided trenches, construction and fill foundations.

Swelling can cause the soil to uplift, sometimes to a greater volume than when the property was built, leading to displacement of the foundation. 

The BRE estimates that in situations where there are trees on shrinkable clay soils the surface movement can be up to 100mm.

Clay heave can impose both lateral and vertical pressures on foundations, resulting in cracking and serious structural damages. 

In ground beam and pile beam applications ClayLite can be used on both faces of the beam.

Calylite is available in 50mm, 75mm and 100mm thickness to suit most commonly encountered combinations on site.




Thickness: 50mm

Width: 1200mm 

Length: 2400mm

Board coverage: 2.88m2

Material: Low density compressible expanded polystyrene (EPS)

Soil heave potential: Medium


Clay Heave and Shrinkage:

Clay shrinks during periods of drought and expands again after heavy rainfall. 

Foundations built on shrinkable clays can normally be affected to a depth of 1m but where there are trees and hedges the depth affected increases.

Clay heave can impose both lateral and vertical pressureson foundations, often resulting in cracking and expensive structural damage.

While piled foundations offer more protection than conventional trench fill, both types still remain highly vulnerable to clay heave, shrinkage or soil movement.

In latter years it has become standard practice to protect building toundotlons-wlth compressible fill such as

Claylite which is purposely designed to absorb natural contractions and expansions within clay and other types of soil.


Site Practice:

Excavations for ground beams or foundations must be carried out in accordance with BS.6032:1981

Code of Practice for ''earthworks", paying particular attention to safety procedures and good site practice.

All fixings should be undertaken from outside the trench.

Precautions should be taken to ensure the face of the excavation does not collapse during installation of the Claylite, e.s. by bridging the trench.



 · BBA Agrement Certificate 

 · Declaration of Performance

 · ISO 9001 Certification

 · ISO 14001 Certification


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 


*returns are subjected to restocking and collection/delivery charges.

Board covarage 2.88 m2
Length 2400mm
Material Expanded Polystyrene (EPS)
Profile Compressible-fill expanded polystyrene
Thickness 50mm
Width 1200mm
Shipping method Rigid Vehicle ǀ Courier
Applications Piled Ground Beams ǀ Foundations
BBA Certified Yes
Soil heave potential Medium
ETA Notification Yes
Features Protection against clay heave or shrinkage
Safe load 20 kN/m2
Manufacturer Kay-Metzeler ClayLite®

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
50mm Claylite Protection Against Soil Movement - Foundation Insulation EPS Kay-Metzeler - 2.4 x 1.2
50mm Claylite Clay Heave Protection EPS Kay-Metzeler
£ 33.17