Home Life: Tip of the week - Frost damage to brickwork
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Your support makes all the difference.WINTER frosts have arrived and frost damage to brickwork can be a problem. Brickwork naturally absorbs a certain amount of rainwater. When the weather is dry, the moisture evaporates and no harm is done but too much water soaked into the brickwork can promote frost damage. Frost can affect both bricks and mortar joints. When the absorbed water freezes it expands and can make mortar crumble and split away the surface of bricks. Over time the surface of the wall will flake and crumble away.
1. Next time it rains make sure your rainwater system is working properly. Check that your guttering is aligned to run slightly downhill towards the downpipes, that all brackets and joints are properly attached and that the gutter is not blocked or sagging. Make sure your downpipes are not blocked and over-flowing, that the joints don't leak and that the pipes are not damaged.
2. Sometimes a dripping overflow pipe can wet the masonry. Hunt down your overflow pipes and make sure none are dripping. Generally you will have one for each toilet, one for the central heating header tank and one for the cold water storage tank. Dripping will almost certainly be the result of a fault with the float valve in the relevant unit.
3. Check any other pipework fixed to the outside of your home for damage, blocks or leaking from a joint.
4. Check the brickwork for signs of repeated wetting. If part of the wall seems discoloured or stained, look for the cause. Most houses have a damp-proof course at least 15cm above ground level and faults in this may allow water to soak up from the ground into the wall. It is also possible for the damp-proof course to be "bridged", for example by soil heaped over it. Look around the base of your walls and move away anything that might allow moisture to soak into the wall or anything that might allow rainwater to run onto the walls.
5. Check the condition of the masonry, that the mortar is even and in good condition not crumbling to leave deep gaps into which water can seep.
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