Some repairs look great on top, but just mask the problem. Until you cut into the timber, you can’t always see what’s happening.
Rot is a fungal infection of timber. In rare cases, the infection can spread into the surrounding wall framing. This shows a wall frame under a sill that was removed.
This customer wanted to reduce the uncertainty in her quote, so she scraped out all the rot before we arrived to quote. This is a good way to see exactly what the problems are.
Are your old windows in need of repair?
Some rot is immediately obvious to the touch. In other cases, you need to cut a cross section of timber or drill a large pilot hole to figure out how far it goes.