The Timber Frame Consultancy

Specialists in the design and supply of timber frame construction

Floors and Roofs

There are many different materials which can be used for floors and roofs, each having their own advantages and disadvantages. Please find below the 3 most commonly used components, excluding traditional roof trusses. These components can also be used for Walls to give better U-Values and higher structural performance.

Solid Timber

One of the cheapest components for the construction of floors and roofsroof joists

  • It ranges in size, normally from 89mm up to 240mm
  • Solid timber cannot accommodate large dia services and are sometimes prone to shrinking and twisting.


I Joists

The  most commonly used components for floors wood joists

  • They are priced slightly higher than solid timber
  • I Joists normally range in size from 145mm up to 450mm
  • Can accommodate large services
  • Some I Joists come with pop out holes for small services
  • They offer a number of benefits over traditional sawn solid timbers, including low weight, no moisture movement and greatly reduced risk of squeaks.


Metal Web Joists

One of the more bespoke options.metal joists

  • Allow for easy installation of services, in particular heat recovery systems.
  • As they are manufactured to size, site waste is reduced however, this does reduce flexibility on site.
  • Lightweight which gives floors more rigidity
  • Greatly reduced risk of squeaks.