Rot in window frames:

There are very few instances where a window frame has become damaged by rot any significant distance above the cill.  Such rare instances have four main causes: when water gets into the drip bar or the transom; when a closed opener sits tight on the transom leading to capillary action; when the opener loses the throating, usually the result of swelling, so someone shaves off the bottom rail so that the opener fits again and doesn’t put in a new throat; or finally when the throat has become filled with layers of paint over the years. There is a reason why the throating should be present all around the opener: it is to stop capillary action taking place.

image for new window site image shows just how bad a double glazed unit can leak note the level of the water this particular unit was 20yrs old

The most common area where you will see rot is in the corners of the cill and in the first 6” on the frame jamb.  It can be caused by the above mentioned faults, or by the pooling of water in the corners coupled with a poor paint surface.  If the paint cracks at this crucial joint and water seeps in, the water has no where to go and no means of drying out, perfect conditions to allow wet rot to take hold.

Other causes of wet rot can be: poor quality paints allowing moisture penetration; painting timber with a high moisture content; timber of inferior quality (usually not applicable to pre 1970s frames); shrubs growing too close or against the timber; and gutters that leak.

Published by southamptoncarpenter

Traditional standards. Traditional tradesman. Traditional service. I have been a carpenter for over 45years, 5 year apprenticeship as a boat builder, 2 years as a wood machinist, then a spell repairing furniture and manufacturing reproduction antique clocks. I spent a further 15 years working in a therapeutic environment passing on my skills, before setting myself up as a self-employed carpenter/joiner. As you will appreciate, I undertake a wide range of projects, so scrolling through the site map may well direct you to past work that may be similar to your requirements. The preferred way to contact me is by using the contact page on this site. However you can always ring me during normal working hours. Lead times vary depending on the time of year; small jobs I can often do promptly. I cover Southampton and I am also happy to visit Winchester and Salisbury areas, but a small fee will be charged.

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