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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Pointing with Lead Mate: what to use to pack joint?
I need to re-point some lead flashing with Lead Mate as there's movement
which has cracked the mortar. Its a wide joint (old, cheap Victorian house) - 25mm plus. The makers recommend the depth of Lead Mate should be only half the width. But raking out the old pointing leaves a depth of 25mm or more. What can I pack this with to make the joint shallower before using the Lead mate pl? -- Robin PM may be sent to rbw0{at}hotmail{dot}com |
#2
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Pointing with Lead Mate: what to use to pack joint?
On Nov 10, 1:11*pm, "Robin" wrote:
I need to re-point some lead flashing with Lead Mate as there's movement which has cracked the mortar. *Its a wide joint (old, cheap Victorian house) - 25mm plus. The makers recommend *the depth of Lead Mate should be only half the width. *But raking out the old pointing leaves a depth of 25mm or more. *What can I pack this with to make the joint shallower before using the Lead mate please? Personally, I wouldn't bother with the Lead Mate, and just use lime mortar for all the re-pointing. If you have some to hand, you could use that. How long is the flashing? I'd be a *bit* concerned about the structural integrity of the wall with a long deep slice raked out of it. Filling the rake with flexible sealant doesn't strike me as providing much strength, so I would want some sort of mortar. (and I'm a great believer in not using cement mortar on lime-mortared walls). |
#3
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Pointing with Lead Mate: what to use to pack joint?
Martin Bonner wrote:
On Nov 10, 1:11 pm, "Robin" wrote: I need to re-point some lead flashing with Lead Mate as there's movement which has cracked the mortar. Its a wide joint (old, cheap Victorian house) - 25mm plus. The makers recommend the depth of Lead Mate should be only half the width. But raking out the old pointing leaves a depth of 25mm or more. What can I pack this with to make the joint shallower before using the Lead mate please? Personally, I wouldn't bother with the Lead Mate, and just use lime mortar for all the re-pointing. If you have some to hand, you could use that. How long is the flashing? I'd be a *bit* concerned about the structural integrity of the wall with a long deep slice raked out of it. Filling the rake with flexible sealant doesn't strike me as providing much strength, so I would want some sort of mortar. (and I'm a great believer in not using cement mortar on lime-mortared walls). It's the parapet wall above the join between the two sides of the rear extension: 7m long* by 3 courses plus capping stone high (except around the chimney stack which has been reduced to 7 courses plus flaunching). I take the point about lime mortar but I doubt that'd have enough flexibility to cope with the seasonal movement we are getting - quite possibly adding to the inevitable differential thermal movement. (There's also longer term movement - ie subsidence - but that's another and of course bigger problem.) *not 7m of continuous lead of course: that was done in sections of less than 1500mm -- Robin PM may be sent to rbw0{at}hotmail{dot}com |
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