Monday, November 29, 2010
What happens when you use cement on an old building?
If the old building is built with lime (or any other breathable material) and the outside is covered in a non breathable material, water will tend to accumulate in the walls. This can cause structural damage,cracks, damaged stone and brick work and damp problems. If then the inside is treated to keep damp out, more water stays in the walls. Like a straw. Water moving upward through the building will try to escape any way it can, usually between floors into timber and ceilings and even roof spaces. Is the roofing felt breathable? Probably not. We have seen so many houses in a complete state of damp and rot that have breathed a sigh of relief when the cement is removed, and lime is used instead. They dry up and are much easier to heat. It's as simple as that. How much does it cost? Very little. The builders day rates should be the same as with cement renders. The materials are coming down in price all the time. And just imagine the savings in terms of not having to do structural work. Please look after your homes, and save them for generations to come.
Posted by Phoebe at 1:32 PM