#11  
Old 07-20-2010, 03:58 PM
Serf
 
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Location: New Zealand
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Default Re: Shinagawa refractory Mortar Cracking problem

But getting back to my question. Do I continue on and just put the poormans mortar or cement on top of the cracked mortar already used. I have plenty of area to work with as the angles on the outside are big enough. What a bloody mess!
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  #12  
Old 07-20-2010, 04:12 PM
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Default Re: Shinagawa refractory Mortar Cracking problem

I doubt you can easily take it off, can you?
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  #13  
Old 07-20-2010, 04:21 PM
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Default Re: Shinagawa refractory Mortar Cracking problem

I would cover what you've already done with poorman's mortar.

I used poorman's mortar throughout during my build and noticed drying cracks the next day. The only way to avoid them is to not put large globs of mortar at one time, but sometimes you can't help that as you need to fill those large wedge gaps. Best thing to do is to keep those areas moist by covering them with a wet towel or plastic sheeting for at least a full day.

George
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  #14  
Old 07-20-2010, 05:11 PM
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Default Re: Shinagawa refractory Mortar Cracking problem

It's cracked so it can flake off in places.
It cracked immediately as soon as I put it on and it started drying. I only did it on Sunday which was 3 days ago.My bricks are about 80 years old. It seems to break parts of the brick off when peeled back. The brick is soft.
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  #15  
Old 07-21-2010, 04:01 AM
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Thumbs up Re: Shinagawa refractory Mortar Cracking problem

Kiwigirl,
sorry if I didn't respond sooner but am very busy and only get time on the computer at night.
If your 'bloody mess' was mine, I would scrape off the adhesive that will easily come away from the bricks without spending a heap of time on, thoroughly wet the bricks (as this will allow the mortar to stick without immediately loosing the water in it and weakening the bond) on the outside , mix up the poor mans mortar to a porridge consistency and using a small trowel, literally throw the mortar onto and into the voids with a scraping and smoothing over the bricks in readiness for the insulation.

Cheers.

Neill
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  #16  
Old 07-21-2010, 12:03 PM
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Location: New Zealand
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Thumbs up Re: Shinagawa refractory Mortar Cracking problem

Thanks Neil. I will do this over the weekend. Sounds like a sensible thing to do.
Will send another message about the progress.
Regards
Chrissy
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  #17  
Old 07-30-2010, 11:45 PM
Peasant
 
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Default Re: Shinagawa refractory Mortar Cracking problem

If your struggling to use a trowel effectively just put a heavy duty rubber glove on and squeeze the mortar into the joints that way. Its gonna be covered anyway
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  #18  
Old 08-02-2010, 02:35 AM
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Default Re: Shinagawa refractory Mortar Cracking problem

Hi Chrissy,
I'm also from NZ where you get your bricks ???
Regards
Bart
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