Apr 16, 2016 10:29 am
We are using a exposure grade brick and it is stipulated within our quotation from our builder that we cannot have raked mortar between the bricks, we can only have mortar flush with the brickwork.
The problem we have is we have just noticed the brickies have ironed our mortar and are almost up the the first floor of our two story build.
We found the problem ourselves and rang our builder and they have said no problem we will just fill in the gap with mortar and make it flush. Now my question? if they add more mortar to end up with a flushed finish over the top of the the ironed finish is there a chance the mortar over time will fall or break away and start to look ugly.
Report this post
Re: Exposure Grade Bricks ?2
May 21, 2016 3:21 pm
Your information is incorrect.
I'm assuming your brickies are laying an AS3700 M4 mortar mix. An ironed or rolled joint is a finished joint with the mortar fines brought to the surface from the tooling and its therefore suitable for high exposure areas.
See 3.1.1 http://thinkbrick.blob.core.windows.net/media/1398/industry-reference-guide.pdf
Properly filled and tooled/ironed joints improve the durability, weather-proofness and sound performance of brickwork. For durability in a salt atmosphere (for example, near the coast) and good fire resistance (for example, in bushfire-prone areas or in fireplaces) a tooled, flush or near-flush joint is best.
Personally I think a flush joint is weaker regarding penetration of salt as it doesn't have the protection of a smooth surface. Look closely at a flush joint wall and you'll see what I mean.
Repointing a cured rolled joint is pointless [LOL] as its going to break away from the original rolled joint mortar either when its pressure washed or as the mortar shrinks [which it always does].
It will look ugly.
IMO go with a rolled joint as it's always a better finish overall.
Being a builder is more than just having once held a hammer. It's about the trades you hire and ensuring that they give a result that meets the industry standard and the home owners expectations.
Sign in or Join to reply to this Topic
Den45Anticon blanket or high grade sarking under metal roofAnticon blanket or high grade sarking under metal roof
Thanks for advise