Extension joining the new house
- Thread starter mravant
- Start date
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It sounds like an expansion joint, which usually have a piece of foam/ soft fibre like board in them but it doesn't neccessarily need to have anything in it but at the very least should be sealed to make it weathertight. Fill it with polysulphide sealant.
they've used a wall starter which is like a rail which is drilled, plugged and screwed into the existing masonry and has ties supplied which slide into the rail. This technically isn't a movement joint, but becuase it is a new addition to the building with a new foundation etc. it is the most likely point of initial settlement. Therefore i would use a matching colour external use silicone to allow for settlement of the new addition. Mortar will crack and need replacing should settlement occur.
do you mean the starter system or the idividual ties? i use the system(rails), not necessarily staifix, for extensions and the individual ties for blocking up old windows and things where you struggle to fit a full rail in.
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