Timber frame construction is based on factory-made structural components illustrated in the diagram opposite.
The timber framed wall panels carry the loads on the building to the foundations whilst the outer cladding provides decoration and weather protection. The outer skin or cladding can be brick, stone or lightweight claddings, such as timber boarding, tile hanging or render.
Factory production of the timber frame panels ensures that they are accurately manufactured to precise tolerances in a controlled environment.
The timber frame panels are rapidly erected on site and, with trussed rafters forming the roof, a weather tight building can be created in a matter of days. This enables work to continue in protected conditions within the building whilst the outer cladding and roof finishes are applied.
Timber is recognised as the only renewable construction material and the softwoods used in timber frame are sourced from environmentally sustainable British and European forests.
The timber frame method of building gives designers flexibility in both layout and external appearance. High levels of thermal insulation are incorporated within the construction, reducing heating costs and conserving energy.
Dry construction not only saves time on site but means that decorations can be carried out soon after completion of the building without risk of cracking and deterioration of finishes.
Timber frame wall panels are made up of softwood vertical studs and horizontal rails with a wood-based panel sheathing and a plasterboard lining. The studs carry vertical loads through the structure and transfer them to the foundations. The sheathing provides resistance to lateral wind loads (known as racking resistance). Thermal insulation is usually incorporated in the spaces between the studs of external walls and protective membrane materials may also be required, depending on the design of the wall. For most external walls a breather membrane on the external face of the panels protects the panels during construction and provides a second line of defence against any wind-driven rain that may penetrate the completed external cladding.