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Technical Information

Off-Site MMC

In the industry jargon this phrase conveys that the use of a Timber Frame System of building is a Modern Method of Construciton (MMC) where significant major elements of the structure are built Off-Site in a factory and then transported to the site where they are assembled to form the whole building.

UK Timber Frame

Timber frame construction in the UK is based on factory-made structural elements. The timber framed wall panels carry the loads on the building to the foundations whilst the outer cladding provides decoration and weather protection. Cladding is a matter of choice; it can be brick, stone or lightweight claddings, such as timber boarding, tile hanging, or render.

Timberframe house and kit homes

Timber Frame for All

Factory production of the timber frame panels ensures that they are accurately manufactured to precise tolerances in a controlled environment away from the vagaries of British weather.

The timber frame panels are rapidly erected on site and, with trussed rafters forming the roof, a weathertight 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 frame is not just for houses; it is being used extensively for flats, schools, hotels, offices and sports facilities. Buildings up to eight storeys high can be constructed and, like all methods of construction, conform to the requirements of the Building Regulations.

Timberframe Engineering

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. A vapour control layer in the form of polythene sheet or plasterboard with an integral vapour control layer is normally required on the 'warm' side of the insulation, behind the plasterboard lining to limit the amount of water vapour entering the wall panel.

What is Timber Frame?

Timber Frame Technical 1 by TRADA

Why use timber frame?

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.

Next steps

Most timber frame buildings in the UK are built using prefabricated panels produced by specialist companies like Benfield ATT.

An overall view of the construction method is given in Benfield ATT's guide 'Introduction to Timber Frame Construction', available on request.

If you have a particular question or problem we’ll be happy to answer it for you.
Just e-mail our Build Centre using our contact form

 

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