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Timber Frame Details

The details within this section are valid for a range of timer frame wall thicknesses from 89mm up to 150mm stud size.

For this form of construction, details are given for the junctions with a range of roof, ground floor and internal floor types, in addition to details around window openings etc.

The nature of timber framed construction is that a variety of structural forms can be adopted, with variables such as stud centres, double or single head plates. The form of structure selected has an influence on the thermal performance of any given wall and so must be taken into account by those using these details.

Further variables are:

  • Type of insulation chosen
  • Type of sheathing
  • Type and thickness of plasterboard (or other sheet material)
  • Internal linings used and the outer cladding of the building


Products specified should be suitable for their intended purpose.

Insulation thicknesses for main building elements have not been provided as these depend on the thermal properties of the materials chosen together with the proposed U-value.

All details are shown with a brick outer lead for simplification. However, other types of claddings may be used without any loss of thermal performance or increased technical risk subject to suitable detailing. These include render on metal lath (on vertical battens fixed direct to frame), tile hanging on battens on frame, sheet panel systems on vertical counter battens fixed to frame, out leaf of other masonry.