When you’re picking lintels, start with the opening, the wall build-up and the load above it. That narrows the choice faster than brand or finish. Steel lintels are often used where you want a slimmer section and a lighter lift. Concrete lintels suit straightforward masonry work and are often the economical call on ordinary openings. Cavity lintels, solid wall lintels and replacement lintels each cover a different job, so getting the format right saves delays and returns.
Keystone Lintels SB/K - 1500mm
1500mm lintel for cavity wall outer leaf support
IG L10 Single Leaf External Lintel - 100 x 1500mm
Galvanised steel L-shaped lintel for single leaf walls, 100mm x 1500mm
Keystone Lintels HD/K-90 - 1500mm
Keystone HD/K-90 lintel, 1500mm, for cavity widths 90-105mm
IG L9 Solid Wall External Lintel - 215 x 900mm
900mm galvanised steel external solid wall lintel for 215mm walls
IG L1/S75 Standard Cavity Lintel - 1800mm
1800mm IG L1/S75 galvanised steel cavity lintel for cavity wall support
Keystone Lintels S/K-150 - 1200mm
1200mm lintel for cavity walls 150-165mm, requires propping during installation
Keystone Lintels S/K-90 - 1050mm
1050mm lintel for cavity widths 90-105mm, blockwork tight to inner face
Keystone Lintels SW/K - 2700mm
2700mm standard load lintel for 215mm solid walls
IG Steel Lintel L1/S110 - 110-125mm cavity 1200mm
Steel lintel for 110-125 millimetre cavity walls, length 1200 millimetres
Keystone Lintels SW/K-100 - 1200mm
1200mm lintel for 100-150mm solid walls, requires tracked blockwork
The first question is what the opening is carrying and how much room you’ve got to work with. That usually decides the lintel before anything else. For a straightforward job, concrete lintels are often the economical call. Steel lintels come into play where span, load, or build-up needs a slimmer section. Cavity lintels and solid wall lintels are not interchangeable. Replacement lintels matter on remedial work, where you’re matching what’s already there. The jobs that go wrong are usually the ones where the opening was measured right, but the wall type was guessed.
If you’re sorting lintels for a job, the main split is between cavity lintels, solid wall lintels and heavier load bearing options.
Cavity lintels suit the usual two-leaf build because they keep the support where it needs to be. Solid wall lintels are the better fit for a single leaf or an older wall build-up.
Load bearing lintels come in when the opening is carrying more above it. You give up some simplicity, and you’ll usually check the spec more closely.
Building Supplies is the parent range if you’re matching the lintel to the rest of the job.
Material choice usually settles the argument faster than anything else. Steel lintels are the one to reach for when you want a firmer face and more confidence on tougher daily use. The trade-off is handling. They’re heavier to move than acrylic on many sites.
Concrete lintels are the quieter pick when weight and cost matter more than a harder finish. They work well where the opening does not need the same level of impact resistance, but they are not the answer for every job.
If you’re picking up matching materials at the same time, Aggregates & Chemicals and Brickworking are usually the next counters to check, especially when the opening detail or surrounding work is changing the spec.
Once the lintels are chosen, the next call is usually what’s going around them. If the opening is being rebuilt, you’ll often need brickworking to match the surrounding course work, and aggregates & chemicals for the mortar and any bedding or repair work that follows.
Where the job is a replacement, check the adjacent finish before you leave. A clean lintel change still gets judged on the reveal and the patching around it. That’s the bit that usually decides whether the job looks finished or just covered up.





