Keystone Lintels

Tamar Trading Building Supplies offer an extensive range of steel lintels from Keystone Lintels, the largest steel lintel manufacturer in the UK and Ireland.

Standard Steel Lintels

The range of standard steel lintels are designed to meet a wide range of structural requirements accommodating a variety of wall types, cavity sizes and load requirements. The range includes 100mm inner leaf, wide inner leaf, wide outer leaf, eaves, timber frame, single leaf, box and stainless steel lintels.

Hi-therm+ Lintels

The Keystone Hi-therm+ Lintel offers a low cost solution for reduced carbon emissions. Up to 5 times more thermally efficient than a standard steel cavity wall lintel, the Hi-therm+ Lintel is the only BBA approved one piece lintel solution which achieves the appendix R value for steel lintels in Part 2013. The Hi-therm+ range offers even greater practicality to builders as the simplicity of the one piece structurally superior design makes installation quicker and easier unlike a two part lintel solution.


Special Steel Lintels

Keystone Special Steel Lintels help designers and builders to achieve complex architectural features. These special steel lintels can be custom made to meet bespoke specifications. The special steel lintel range includes full arch, segmental arch, parabolic arch, apex, Venetian arch, gothic arch, bow, square bay, splayed bay and corner lintels.

Sun Lounge Lintels

A sun lounge is a cost effective way to add space when building or extending a home, creating a room that can be enjoyed all year round. Keystone’s range of sun lounge lintels can be custom designed to meet your specific requirements with a wide range of designs available including apex, Venetian, Bow and square bay sun lounge lintels.

Brick Slip Feature Lintels

The Keyslip Brick Details range includes Brick Slip Feature Lintels and lightweight brick headers and sills which are manufactured in controlled factory conditions. These one piece solutions are delivered to site complete with brick slips bonded to the load bearing lintel ready for final pointing. This results in faster build speeds and reduces the need for specialist labour onsite.


Keystone Windposts span vertically between floors to provide additional lateral support for large panels of brickwork or large panels with openings. The windpost range includes DU windposts, U windposts and LP windposts and well as parapet and spandrel windposts.

Cavity Trays

We also stock a range of Keystone Cavity Trays which offer a cost effective method of damp proofing. Keystone Cavity Trays are designed for a fast and easy installation and provide builders with the flexibility to cover a wide range of roof pitches and cavity widths. Contact our team for expert advice on the Keystone Lintels product range.

As well as the Keystone Lintels product range, we also supply concrete lintels. Visit our builders merchants stores in Holsworthy, Torrington or Bodmin for expert advice and to explore our range. Whether you need a door lintel for a cavity wall, a window lintel for the eaves or a metal lintel beam for a decorative opening, we can help!