Browse
Buildbase | Building & Timber Supplies. Designed for the trade - Open to the public
Please Set Branch for Collection or Delivery

HOW TO: CHOOSE THE CORRECT LINTELS

Choose the right lintel

HOW TO CHOOSE THE CORRECT LINTELS: STEP 1, STEP 2 and STEP 3 

Choosing the correct lintel can seem like a daunting task, with hundreds of difference styles and sizes, it can make even a seasoned tradesman double take.

Here at Buildbase and Lintels.co.uk we want to help streamline this process to save you time, money and the associated headache that comes with wasting both of the above. We have a 3 step guide which if followed will allow the correct lintel to be determined for the majority of cases.

STEP 1: KNOW YOUR WALL CONSTRUCTION

Below are the 6 Main Types of Lintels

CAVITY WALL

Cavity Wall box image

INTERNAL SOLID WALL

Internal solid box image

TIMBER FRAME

Timber Frame Box Image

INTERNAL PARTITION

internal partition box image

SINGLE SKIN

Single Skin Box Image

EXTERNAL SOLID WALL

external solid wall box Image

In addition to this you will need to know the dimensions of the Wall. For example a Cavity wall you will need to know:

A: Outer Leaf. 
B: Cavity. 
C: Inner Leaf.

OCI Box Image

in this example.
A 100mm Cavity Wall Lintel would be required.

STEP 2: KNOW YOUR LENGTH

How wide is the structural opening?

  • Measure the size of the structural opening i.e. the clear span between the Masonry supports.
  • Add 150mm minimum bearing to each end.

See example below:

steptwo box image

With this example:
150mm + 1800mm + 150mm = 2100mm.
Bearing + Clear Span + Bearing = Overall Length.

STEP 3: KNOW YOUR LOAD

You need to know the load in which the Lintel will support.

This can be determined by:

  • Masonry
  • Roof Load: Truss / Attic.
  • Floor Load: Joists / Slabs.
  • Live Loads: Residential / Commercial / Industrial Use.

Finally, the Ratio between the Outer and Inner Leaf will need to be established.

By Following these 3 steps you will be well on your way to choosing the correct lintel for the job in hand.

If you are not sure about any of the above, contact your local expert team with our Branch locator, they will put you in touch with a lintel Technical team who can assist.

EXPLORE OUR LINTELS PRODUCT RANGE

CONCRETE LINTELS

Prestressed concrete lintels play a pivotal role in any building’s structural integrity typically used for window and door openings. They can accept a wide range of surface finishes without special preparation and come in a variety sizes and loadings. This makes concrete lintels reliable and durable with a lower construction cost, fewer joints and a high strength to section ratio.

Prestressed concrete lintels are one of the most reliable, durable and widely used in the construction industry, boasting a number of benefits including lower construction cost, fewer joints and a high strength to section ratio.

Supreme prestressed concrete lintels have been awarded a BSI Kitemark, are manufactured with a texture finished and feature Supreme’s superior concrete technology to match the lintel to a multitude of frames.

Prestressed lintels have high-tension steel wires running through the middle. The lintels have excellent thermal properties and are less susceptible to moisture and chemical corrosion.

The lintel should be installed with a minimum end bearing of 150mm and unlike steel lintels, a concrete lintel is often used in visible areas and painted if required.

Supreme Prestressed Concrete Lintels stocked in sizes from 600mm to 3000mm:

SUPREME R15

SUPREME R22

SUPREME R21

SUPREME P100

SUPREME P220

Shop Concrete Lintels

CAVITY LINTELS

Cavity wall lintels are designed for use when two layers of bricks and blocks or ‘skins’ are used to construct a space or cavity between the structure. The in-built foam or polystyrene insulation helps to retain warmth through insulation and reduces condensation.

Our key suppliers are Birtley Steel Lintels and Keystone Lintels. All of our steel lintels are galvanized to protect against premature rust and corrosion and meet the Thermal Performance requirements of all UK Building Regulations.
The NHBC (National House Building Council) recommend a damp-proof course (DPC) or cavity tray should be installed over all openings in external cavity walls.
Buildbase has a large range of standard cavity lintels available in a variety of widths from 70mm to 165mm, with lengths from 900mm to 3900mm.
For thicker steel and when a lintel with a longer span is required, Buildbase has a range of medium and heavy duty lintels for 90-105mm cavity widths stocked in lengths from 1200mm to 4800mm.

Cavity Wall Lintels (110-125mm Cavity) stocked in:

BIRTLEY STEEL LINTELS CB110 / KEYSTONE LINTELS S/K-110

Cavity Wall Lintels (150-165mm Cavity) stocked in:

BIRTLEY STEEL LINTELS CB150 / KEYSTONE LINTELS S/K-150

Heavy Duty Cavity Wall Lintels (90-105mm Cavity) stocked in:

BIRTLEY STEEL LINTELS HD90 / KEYSTONE LINTEL HD/K-90

Standard/Medium Duty Cavity Wall Lintels (90-105mm Cavity) stocked in:

BIRTLEY STEEL LINTELS CB90HD PRODUCT / KEYSTONE LINTELS HD/K-90

Cavity Lintel

SOLID WALL BOX LINTELS

Box lintels are used for solid wall construction, with the 100mm ranges used for single skin internal walls and the 200mm ranges used for double skins, typically external walls, with no cavity.

The lintel is designed to carry the full load of wet masonry as soon as it is installed but must have a minimum end bearing of 150mm each side of the opening and be bedded on mortar with all perpendicular joints filled with mortar.

The box lintel is galvanised to protect the steel from premature rust and corrosion and has perforations along its length acting as a plaster key and can be insulated if required.

Box lintels are available in two options to support 100mm wide walls with lengths from 1200mm to 3600mm, and 200-215mm wide walls with lengths from 1200mm to 4800mm.

BIRTLEY STEEL LINTELS SB100

BIRTLEY STEEL LINTELS SBL200

KEYSTONE LINTELS BOX K/100

KEYSTONE LINTELS BOX K/200

  • 1200mm 2540605
  • 1500mm 2540607
  • 1800mm 2540609
  • 2100mm 2540611
  • 2400mm 2540613
  • 2700mm 2540615
  • 4800mm 2540629
Solid Box Lintels

SINGLE LEAF LINTELS

Constructed from galvanised steel, single leaf lintels are used to support single leaf walls or the external openings (the outer leaf) of a cavity wall, adding strength to the construction.

Single leaf lintels are suitable for faced brick or block walls and can be used for meter reading boxes through to heavier applications. Lintels over 1500mm must be propped until masonry is fully loaded and cured.

BIRTLEY STEEL LINTELS LA

KEYSTONE LINTELS SB/K

Single Leaf

PADSTONES

Supreme padstones are high strength dense concrete blocks designed to support the weight of load-bearing lintels whose ends rest on the padstone. The concrete used in the manufacturing of the padstone conforms to a compressive strength class C40/50.

Concrete padstones are a vital part of construction as they designed not to be crushed like regular blockwork when subjected to the pressure of the steel or concrete lintel and the weight above.

Pitched Roof
Cavity Wall Lintels

Cavity Wall Lintels

Concrete Lintels

Concrete Lintels

Eaves Lintels

Eaves Lintels

Single Leaf Lintels

Single Leaf Lintels

Solid Wall Lintels

Solid Wall Lintels

Padstones

Padstones

Lintels Catalogue
widget2 bk image

VIEW CUSTOM MADE LINTELS

Harvey Steel Lintels

Buildbase and Lintels.co.uk are part of the Grafton Group, giving you access to a huge range of steel and concrete lintels from the UK’s number 1 distributor. If we don’t have it in local stock, you can easily order from our huge depot at Lintels.co.uk where we have 1000s of lintels readily available with fast national delivery. Lintels.co.uk are dedicated to servicing build projects for standard, heavy duty and specialist lintels.

We stock all three major lintel suppliers – Catnic, IG and Birtley. With 1000s of lintels in stock, nationwide delivery serviced from our 16 National Depots with the added benefits of same day collection and Next working day delivery available for 100s of our products. If you need quality, reliability and fast delivery. Lintels.co.uk should be your first stop and only stop.

Our team of experts are always on hand to solve your lintel queries, whether that is choosing the correct lintel or enquiring about a price help is at hand. In addition to we have a handy guide to choosing the correct lintel for you job. This simple and easy to follow guide will equip even lintel novices with the tools they need to start the selection process for your lintel needs. - Explore Our Product Range.

We use cookies to help give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the website. However, you can read our Cookie Policy here.

Accept and Continue