If you need more space in your home, loft conversion steel beams or extensions steel beams are often an ideal solution, providing additional space in your property without having to upsize. You can simply extend upwards into the loft area to add more accommodation.

At Cannon Steels our steel beams for loft conversions are the ideal choice for a conversion or loft extension. We fabricate all steelwork in our workshops and we are able to manufacture steel for all loft conversion builds, from standard slice and box frame steel to cranked frame and double beam connections.

Cannon Steels are therefore able to produce and deliver the complete steel frame for your new loft rooms, on time and millimetre-perfect.

All steel is fabricated to your exact requirements. Our in-house draftsmen use Autocad and Tekla computer based drawing systems which include 3D modelling to design and produce your exact steel specification. We can also work closely with your architect and builder to ensure the delivery and installation is as smooth as possible.

We deliver your steel to your site using our own fleet of specialist lorries, each of which is equipped with on-board crane facilities. We also have the added option of extended crane vehicles in our fleet, with the capacity of lifting steelwork up to 15 metres high.


In most loft conversions, steel beams are used to take the extra load of the build. Beams are typically installed to run from side to side of a property to the other, such as from one party wall to another.

The positioning of the beams in the loft conversion is vital and your architect or structural engineer will ensure that the plans for the build provide the maximum load bearing support from the steel beams.

Sizes and the quantity of the steel  beams you will need for a loft conversion will depend on the design of the conversion, the type of beam you use and how many beams you require.

In most builds, a certain range of steels will be recommended in the architectural design. We hold many standard steel beams as stock items.


Pricing of your loft conversion steel beams will depend on the size and the design of your proposed loft conversion.

Contact our expert team for a bespoke estimate for your build if you have your finished design, or a calculated estimate if you are at an early stage.


Based in Enfield, North London, Cannon Steels has been established in the building and construction trade across London and the surrounding areas for over 50 years.

We are ideally situated to supply premium quality steel beams and frames for loft conversions in North London and the surrounding areas including Hertfordshire, Bedfordshire, Kent and Essex.

Our company hold large stocks of structural and reinforcing steels, we manufacture our steel in our own workshops and deliver on our own vehicles.  We are therefore able to offer a complete service for the supply and fabrication of steel beams for any loft conversation, alongside similar build projects.

All steel we manufacture has original manufacturer’s test certification and meets with all building control regulations. All our welding, drilling and steelwork fabrication is compliant with CE Marking standards.


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