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"From start to finish we were made to feel like the only customer Tailor made had to deal with. Sent drawings… within a day if not sooner Phillip had sent back specs costs and solutions. Delivery time was booked bill was paid delivery was delivered exactly on point!!! In short if this company was to run for government this country would be a better place 😊😊 Thank you Phillip and crew it’s been a pleasure dealing with you with more projects to come."

— Chris, Trustpilot

  • No need for cranes 🪽

    Posi-Joists and Posi-Rafters are lightweight and easy to handle, often negating the need for a crane or other expensive hire equipment—ideal around tight London streets.

  • Easy to transport 🚚

    Posi-Joists and Posi-Rafters are easier to deliver to London than other methods and will fit on smaller vehicles; even in the back of a van if the span isn't too huge.

  • Versatile 💪

    Whether you need a floor, flat roof or sloped roof, Posi-Joists and Posi-Rafters can be designed and made for virtually all floor and roof applications.

  • Ideal for renovations 🏡

    If you're taking on a renovation of a property, these metal web joists work perfectly as a replacement floor thanks to their long spanning capabilities and easy routing of services.

  • Quick to install 💨

    Posi-Joists and Posi-Rafters are quick to install and even quicker to route services through—ideal both for those in the trade and for those paying someone who is!

  • More site space 🔨

    Rather than having to store vast amounts of timber on site, Posi-Joists/rafters can be delivered just in time for installation.

How far will Posi-Joists span?

Select your joist type, type a span and our calculator will tell you how far you can clear span.



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Model of a trussed roof with a Tailor Made Designs quote to the side.

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Cost of Posi-Joists in London

Each job is bespoke, so the price varies quite a bit. For en easy way to price your job, you can build a quote online (and order!) or request a quote here.

Benefits of Posi-Joists over traditional joists

Posi-Joists (or metal web joists, engineered joists, etc) are lighter, can span further, and crucially, can have services routed through them without need for modification, greatly speeding up installation times.

What are Posi-Joists suitable for?

These engineered joists can be used for floors, flat roofs, pitched roofs and more.