Air Leakage

Products designed to tackle heat and air leakage enabling house builders to achieve their targets for modern, energy efficient homes.


Builders face constant pressure to make their houses energy efficient, and buildings that fail to meet air leakage standards can cost thousands of pounds in wasted time and repeat labour. Heat loss due to air leakage can also lead to mounting energy bills and a drafty, uncomfortable home for the eventual occupant.

Manthorpe’s range of joist seals and radiator pipe guides & seals are designed to tackle these air leakage problems quickly and effectively making it easier for the builder on site to deliver a quality home.

The joist seal range solves the problem of air leakage around timber joists and 'I' beams at the point where they penetrate through the internal skin of masonry, helping to meet Part L and E requirements of the Building Regulations without resorting to joist hangers.




Inexpensive, quick and easy to fit, the radiator pipe guide & seals provide a highly effective air leakage barrier, conserving energy and reducing householder's fuel costs. 

For builders, it is an ingeniously simple way of complying with the Part L Regulations regarding air tightness.

Cut out of radiator showing face-fix radiator pipe guide installed in the internal blockwork or stud wall behind the dry lining, directly behind where the radiator will sits.

Radiator pipe guides and seals – increased thermal efficiency

  Manthorpe’s radiator pipe guides and seals create an impermeable barrier at the point where radiator pipes meet and pass through walls...

Building site showing a row of joist seals pushed onto joists and laid on blockwork

Joist seals in a wide range of sizes and permutations

Joist seals – another innovative product from Manthorpe designed in response to the evolving building regulations. Our joist seals are designed...


From our first foray into the building industry through to our latest product innovations, Manthorpe Building Products has grown year on year thanks to a philosophy of continuous investment and development. 

Read more


At Manthorpe we pride ourselves on our high quality standards, not just for the products that we produce; but for our design, manufacture, sales and delivery processes as well.

Read more


Innovation has always been at the core of the company.  From new technology investment to in-house research and development, Manthorpe is constantly looking ahead to meet the needs of the industry.

Read more
Request a call back

Request a Call Back

Request a call back