NewsDecember 16, 2011
Timber external doors factors affecting performance
 An external door has a demanding role to perform and is expected to maintain its level of performance over many decades. It is mechanically stressed throughout its life due to opening and closing. Its inner face is subjected to the heated dry interior of the building, whilst the outer face is often exposed directly to the elements, unless protected by a porch or protective canopy. It is often installed into a building which has not yet dried out, yet it is expected to remain flat and maintain the designed door-to-frame gaps both during and after the drying out period.
The architect, door designer, manufacturer, supplier, installer, user and maintenance contractor form the chain of responsibility that leads to long-term satisfactory performance of timber external doorsets. TRADA Technology's Wood Information Sheet Timber external doors - updated for ease of downloading online - discusses aspects of design and site practice which affect the performance of external doors and gives signposts to more detailed sources.
Timber external doors is available in PDF format free of charge from the TRADA website - click here. The cost is £12.00 for non-members. To order click here.
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