RENOVATE
Beams and timber trusses may be part of a country home’s appeal but they need proper care to prevent damage from pests and decay
FEATURE ROGER HUNT, AUTHOR OF OLD HOUSE HANDBOOK
The weathered beams of aperiod country home have character etched into every groove and grain. They are also remarkably resilient to the ravages of time and the British climate –reasons why timber-framed properties are still apopular choice for rural self-builds.
‘Our company is based in Herefordshire, a county renowned for its oak-frame buildings, many of which are hundreds of years old,’ says aspokesperson from timber-frame specialists, Oakwrights. ‘The main difference is that our oak frames are not exposed to the elements as they are sealed inside an encapsulation system. Ancient or modern, the heartwood from the middle of the oak tree is difficult for insects to chew through and full of tannins that repel them. As the oak seasons, it becomes even less palatable and harder to digest. So, while it’s almost impossible to give an exact lifespan to a timber house, the compelling evidence is that green oak frames will last for many centuries.’
But atimber frame needs to be maintained and treated with care to ensure its longevity. Unfortunately, repairs and renovations using inappropriate products, such as mastics, cement-rich renders and modern paints applied over ancient timbers, can actually damage the structural integrity of the building. This is because they trap moisture within the wood, allowing beetle infestation or rot to take hold and cause decay. Problems can also result from leaking rainwater and high ground levels.
CHECKING FOR TIMBER DECAY
When assessing the condition of atimber-frame building, it’s important to note poor past repairs and lack of maintenance. ‘Look for dampness in the structure, big cracks within infill panels and leaking gutters or downpipes,’ advises Joel Hopkinson of Dolmen Conservation &Joinery.
Timber decay is the main problem. ‘If you can stick your finger into the wood or asharp object sinks into the timber, you know it’s rotten,’ says Rob Wight of Oakwrights. ‘It’s more difficult where the timbers are covered over and you may not even know there are timbers there.’
Many surveyors will comment only on the visible parts, so it’s important to employ asurveyor who will look at the complete structure. ‘With agood survey, you will understand the level of intervention that may be required,’ explains Joel. ‘You’ll need to think about the urgency of any work
