Mack1420 Posted December 2 Share Posted December 2 Hi everyone I am new here and looking for abit of advice really. We live in an end terrace and just recently I have noticed when it rains there is always rain running down the side from beneath the chimney. However it seems to be getting worse. I know one piece of the flashing needs fixing but i don't think this is what is causing the problem. I have attached 2 pictures to make it clear how it looks. Amy advice would be most appreciated thanks Link to comment Share on other sites More sharing options...
joe90 Posted December 2 Share Posted December 2 Bricks are not waterproof, it’s just their evaporation rate is higher than their absorption rate. I don’t think flashing is an issue, top of a gable wall will always get the worst of the weather hitting it. It only becomes a problem if freezing causes spalling (frost blows the surface of the brick off). Or damp penetrates the wall. You could treat the gable wall with a waterproofing agent but only when it’s completely dry. 1 Link to comment Share on other sites More sharing options...
Mack1420 Posted December 2 Author Share Posted December 2 Thanks it just seems strange that it just started happening , never seen it before 5 minutes ago, joe90 said: Bricks are not waterproof, it’s just their evaporation rate is higher than their absorption rate. I don’t think flashing is an issue, top of a gable wall will always get the worst of the weather hitting it. It only becomes a problem if freezing causes spalling (frost blows the surface of the brick off). Or damp penetrates the wall. You could treat the gable wall with a waterproofing agent but only when it’s completely dry. Link to comment Share on other sites More sharing options...
Sam B Posted December 2 Share Posted December 2 2 hours ago, Mack1420 said: Hi everyone I am new here and looking for abit of advice really. We live in an end terrace and just recently I have noticed when it rains there is always rain running down the side from beneath the chimney. However it seems to be getting worse. I know one piece of the flashing needs fixing but i don't think this is what is causing the problem. I have attached 2 pictures to make it clear how it looks. Amy advice would be most appreciated thanks What's on the other side of the wall? A loft (so bare brick that you can check to see if it has any moisture on so you know if you have a problem) or a bedroom (with wallpaper that is bubbled and is coming away from the wall so again you know if you have a problem). I'm sure you will have done so already but do check to see what the inside wall of your house looks like and if there is moisture you know there is an issue. I was told by a roofer that the area around the chimney is a known weak spot however it looks like you have had a new chimney (different colour of brick) so not sure of the quality of the work when you had your chimney replaced. 1 Link to comment Share on other sites More sharing options...
Mack1420 Posted December 5 Author Share Posted December 5 Thanks Sam i will take a look in the loft at weekend and see what is happening up there Link to comment Share on other sites More sharing options...
Mr Punter Posted December 5 Share Posted December 5 When the wall is dry you could apply a coat of StormDry. It should last 25 years and keep the wall dry while still allowing evaporation. 1 Link to comment Share on other sites More sharing options...
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