Timber joist and deck floors - avoiding movement

TRADA image

This Wood Information Sheet (WIS) gives guidance specifically intended to minimize problems of movement and noise in timber floors in masonry or timber frame buildings. The guidance relates mainly to dwellings although much is applicable to floors in other building types, such as timber compartment floors in flats.

This WIS can be used as a checklist for designers and site supervisors to ensure that timber floors give continuing satisfactory performance.

This sheet does not cover the design information readily available in documents, for example thermal insulation and ventilation.



  • Background
  • Timber joists
  • Strutting and noggings
  • Floor decking
  • Support of non-loadbearing walls
  • Ceilings for immediate floors
  • Squeaks, creaks and cracking noises



Suggested Reading

Strutting in timber floorsnavigation-arrow

Strutting plays a useful role in promoting composite structural behaviour of the components that form a timber floor.

The effects of strutting are to:

  • reduce local deflections by transferring load to adjacent joists (load sharing)
  • improve joist stability by providing lateral support to joist edges
  • reduce the...

04/05/2018 |  Wood Information Sheet  

Wood flooringnavigation-arrow

Timber flooring is an effective way to add character to your home. Successful installation of a wood floor depends on the right selection of the type of flooring, the species from which it is made and its construction and appearance.

This Choose and Use sheet contains some best practice...

01/01/2012 |  Choose and Use  

Nearshoring: the industry market trend in hardwood flooringnavigation-arrow

Why are firms starting to source products from Europe rather than China – and what are the market implications? Alex Davidson investigates.


Article from Timber 2017 Industry Yearbook



01/03/2017 |  Magazine Article