Steel lintel vs concrete lintel

Steel vs. Concrete Lintels: 7 reasons to consider concrete

Andrew ALL, Concrete Lintels, Steel Lintels 12 Comments

prestressed concrete lintel

Concrete lintels are generally cost less than steel, but are there other reasons to specify them?

For those people who use and install structural building products, particularly load bearing steel lintels and prestressed concrete lintels, you probably already know the main differences between the two types. You will also be aware of the advantages of steel over concrete lintels.

But is there more to concrete, and are there circumstances in which it may be preferred?

In a word, yes.

As a manufacturer of both, we make no bones about the strengths of one over the other; in fact, we are arguably best placed to objectively look at each type.

However, there are some cases where a concrete lintel is the preferred option and good reasons in certain situations to specify a concrete lintel instead of a steel lintel.

Cost

The biggest and most obvious reason to specify or select a concrete lintel is a financial one. Concrete is effectively a commodity and as such a concrete lintel usually costs the builder or installer a lot less than a steel lintel version. We always encourage those buying and using lintels to understand the load values, but if it simply comes down to price, concrete is usually more favourable.

Strength

It is not a myth that steel lintels are stronger than concrete; this is generally the case, but it is a little more complicated.

A high strength prestressed concrete lintel can often offer better supporting properties than a similar steel version at certain lengths and can be considerably cheaper. It is always best practice to look at the load span tables of the lintels or to ask the manufacturers technical team before choosing a lintel.

Thermal properties

Steel lintels are used with a polystyrene inner to reduce cold bridging in walls. Concrete lintels however, can offer superior thermal properties, and in certain circumstances can almost totally eliminate cold bridging. This can be achieved through the use of a combined steel and concrete lintel, which can be at a much-reduced cost than a thermally broken steel lintel.

Fair faced

steel lintel

Steel lintels are generally designed not to be seen, and are usually covered up.

Steel lintels are designed not to be seen. They are generally installed between brick and blockwork, and covered from underneath. A fair faced concrete lintel is a high performance prestressed concrete lintel with a type C finish. This means it can be installed in ‘visible’ areas and can be painted by the user or installer for even more flexibility.

Flexibility

Talking of flexibility – concrete lintels can be cut on site to allow the installer to manipulate the lintel for their purpose.

Degradation

In coastal areas, sometimes classed as MX4 areas, steel lintels can erode due to the salt levels in the atmosphere. To prevent this, the specification of a stainless steel lintel is often required, again often at great expense. A potential alternative can be a fair faced concrete lintel or a combination or hybrid lintel which is less susceptible to the effects of the salt in the air.

Underground

In some cases when building under ground level, a concrete lintel is the preferred option to a steel lintel. Galvanised steel will be vulnerable to moisture and potentially rust, whereas the steel in a prestressed concrete lintel is protected by the concrete.

As with any structural building component, it is always advisable to consult technical teams and engineers on the most appropriate product to use in the specific situation. Lintels are no different, and our technical and specification teams can advise on the best, most cost-effective solution; be it prestressed concrete or a steel lintel.

Comments 12

  1. Please can you clarify what you mean by a combined steel and concrete lintel? Is this a single product you produce, or are you simply advocating the use of a separate concrete lintel for the inner leaf and single-leaf steel lintel for the outer leaf? Thanks in advance!

    1. Post
      Author

      Hi David,
      Thanks so much for taking the time to ask a question. In short, no it is not a single product, although I believe there has been one in the past. It is essentially a combination of a steel lintel and a concrete lintel. If you have any other queries or questions, please don’t hesitate to contact us.
      Thanks, Andrew.

  2. Good article guys but in your Flexibility paragraph you suggest that concrete lintels can be cut on site. That is generally okay if using prestressed lintels but not always okay for precast lintels. I know you only manufacture prestressed concrete lintels but for clarity……….

    1. Post
      Author

      Hello!
      Thanks for your comment. Yes generally, we only refer to prestressed concrete as opposed to precast, so I will ensure that is clear next time. Thanks for the comment.

  3. Hi Andrew,
    I am in the process of using Concrete or steel Lintels . Cost consideration makes me choose concrete ones. However, I am rendering the whole wall and hence, the concrete lintels will also be rendered along with bricks. The concern is because of different expansion rates, will the render over the concrete lintel and the gap between lintel and brick be prone to cracks.
    Or, steel is a better material in this regard?
    Thanks,
    Raj

    1. Post
      Author

      Hi Raj
      Thanks for your email. I understand that concrete is ideal for render, however, I will get our technical team to give you a comprehensive answer.
      Thanks, Andrew

  4. Hi Andrew
    I am looking to turn my detached garage into a garden room and I want to take out the side wall and install bifold doors. The span will be 425 cm with brick piers at either end. As it is only supporting the garage apex roof will a concrete lintel be suitable for such a span?
    Many thanks
    Jim

    1. Post
      Author

      Hello,
      Thanks for getting in contact – I have sent this onto the technical team, and they will be in touch. Thank you.

  5. Hi there I am in process of taking down a load bearing wall. Was going to use concrete lintel. The gap is 2500mm long. Would a concrete lintel do. 150mm x 150 mm by 3000mm.

    1. Post
      Author
  6. I’ve been told that I have to use metal lintels above internal doors. Is this correct, or can I use prestressed concrete on load bearing walls.

    1. Post
      Author

      Hi Clive, yes you can use prestressed concrete lintels above internal doors, providing you do the pre-requisite calculations of the load and ensure the lintel is sufficient. We manufacture and sell both prestressed concrete lintels and steel box lintels, both of which can be used for internal doors. More information can be found in our brochure which you can download for free. You can also send technical questions to technical(at)stressline(dot)net.
      Thanks, Andrew

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