Lintels at Sydenhams

We stock two main types of lintels in most of our branches, Concrete & Metal. 

Concrete Lintels:

Concrete lintels are pre-stressed lintels supplied by Stressline. They come in various sizes and lengths, starting at 600mm in length and increasing in 300mm increments.


Metal Lintels:


Metal lintels are supplied by Keystone and come in many different profiles. Most of our branches stock cavity lintels to suit cavity sizes 50mm, 70mm, and 90mm. These are available in various lengths starting at 600mm and increasing in 150mm increments.


Box Lintels

Box lintels available in 100mm and 150mm in various lengths. 

Keystone are the market leader in special shape lintels offering a fast and professional 
Delivery service.

We are unable to recommend what type of lintel you require as load bearings from plans have to be calculated in order to obtain the correct duty required. This service is offered at no cost from Keystone’s technical department. A copy of your plans will be required. This will Guarantee that the correct lintel is specified so that failure will not occur.

Hi-Therm Lintels

Keystone leads the way with the development of a completely unique range of lintels to address the thermal requirements of new building regulations which require that lintels should be assessed for their effect on the thermal performance of a building.

Key Benefits:
  • Up to 5 times more thermally efficient than cavity wall lintels.
  • The significant reductions in thermal bridging due to the GRP component will assist in the building design process to achieve compliance with Part L and The Code for Sustainable Homes.
  • The use of Hi-Therm will make a significant contribution to a buildings performance in respect of the Fabric Energy Efficiency Standards (FEES).
  • Outperforms Stainless Steel on price and corrosion resistance.
  • Hi-Therm has achieved the 1 hour fire resistance test as carried out by Exova Warrington fire utilising the heating conditions of BS EN 1363-1 1999
Being an independent builders merchant, Sydenhams have the ability to source and supply the full range of both Metal and Concrete Lintels on the market at competitive prices. Please contact us if you have any specific requirements.