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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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Non-setting mastic for roof ridge tile pointing
'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an
alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks |
#2
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Non-setting mastic for roof ridge tile pointing
Steve wrote:
'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks Butyl glazing compound? UV resistance might be an issue though. |
#3
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Non-setting mastic for roof ridge tile pointing
"Stuart Noble" wrote in message
om... Steve wrote: 'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks Butyl glazing compound? UV resistance might be an issue though. Thanks. Might be OK, but seems designed for glass/metal/wood. Surfaces need priming - http://www.everbuild.co.uk/images/pd...20compound.DOC. Ideally need something that bonds well to tiles/mortar. |
#4
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Non-setting mastic for roof ridge tile pointing
Steve wrote:
'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks Steve, Firstly, as mastic is a sealant and not an adhesive, I wouldn't advise using it instead of cement for ridge tiles, especially in high-wind areas - would you use the stuff by itself to fix a door or window frame (wood or plastic)? Secondly, whilst "low modulus building mastic" actually sets, if the thickness of the applied mastic is correct, then there will be sufficient 'flexibility in the bead to maintain the weatherproof seal under all conditions - and you will only get problems if you use very thin beads of mastic. As for your original question, if the ridge tiles are properly packed and fixed with the correct sand/cement/water ratio, then the tiles will still be there even after very high winds. Cash |
#5
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Non-setting mastic for roof ridge tile pointing
"Cash" wrote in message ... Steve wrote: 'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks Steve, Firstly, as mastic is a sealant and not an adhesive, I wouldn't advise using it instead of cement for ridge tiles, especially in high-wind areas - would you use the stuff by itself to fix a door or window frame (wood or plastic)? Secondly, whilst "low modulus building mastic" actually sets, if the thickness of the applied mastic is correct, then there will be sufficient 'flexibility in the bead to maintain the weatherproof seal under all conditions - and you will only get problems if you use very thin beads of mastic. As for your original question, if the ridge tiles are properly packed and fixed with the correct sand/cement/water ratio, then the tiles will still be there even after very high winds. Cash Thanks Cash. The tiles are held securely by cement and the mastic is only intended for the edges. I'll probably go with a low modulus mastic. Steve |
#6
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Non-setting mastic for roof ridge tile pointing
On Friday, September 18, 2009 4:43:55 PM UTC-4, Cash wrote:
Steve wrote: 'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable! There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic? Thanks Steve, Firstly, as mastic is a sealant and not an adhesive, I wouldn't advise using it instead of cement for ridge tiles, especially in high-wind areas - would you use the stuff by itself to fix a door or window frame (wood or plastic)? Secondly, whilst "low modulus building mastic" actually sets, if the thickness of the applied mastic is correct, then there will be sufficient 'flexibility in the bead to maintain the weatherproof seal under all conditions - and you will only get problems if you use very thin beads of mastic. As for your original question, if the ridge tiles are properly packed and fixed with the correct sand/cement/water ratio, then the tiles will still be there even after very high winds. Cash Just cams across this. You have to watch out for the acidity of the product. I think that in the old days they would use a coal-tar based product so it may not be an issue nowadays but take a look at non-setting mastic damage and especially how it eats copper roof flashings (about halfway down the page: view-source:http://www.fourseasonsroofingandsidi...eplacement.htm |
#7
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Non-setting mastic for roof ridge tile pointing
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#8
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Non-setting mastic for roof ridge tile pointing
In article ting.com,
Artic writes scribbled... On Friday, September 18, 2009 4:43:55 PM UTC-4, Cash wrote: The Usenet WayBack Machine strikes again And if it's not a spamming **** (again) I'll eat my shorts! checks, yes edibles in use . . . -- fred it's a ba-na-na . . . . |
#9
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Non-setting mastic for roof ridge tile pointing
On Friday, September 18, 2009 4:13:47 PM UTC+1, Steve wrote:
'Non-setting mastic' is sometimes recommended for pointing ridge tiles as an alternative to sand/cement, to allow for slight movement.. However, I don't know where to find it - the only non-setting mastic I can find is Plumbers' Mate - obviously unsuitable!There are plenty of low modulus building mastics but they are not 'non-setting'. Can anyone suggest where I can get a suitable non-setting mastic?Thanks It comes in a plastic bag and it looks like a mass of small white polystyrene balls the size of pin heads mixed with some form of pink adhesive, texture is like putty density or similar to plasterseen. It never took on to expensive and not very practical. Never seen it use and when asked at the merchants if they had sold any they just laughed. |
#10
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Non-setting mastic for roof ridge tile pointing
Artic wrote:
scribbled... On Friday, September 18, 2009 4:43:55 PM UTC-4, Cash wrote: The Usenet WayBack Machine strikes again Just thinking the same myself - bloody hell I was working for a living then, as opposed to a life of luxury in retirement now. How time flies. LOL Cash |
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