Can anybody advise on the position of wall ties in a foundation wall that is 3 courses high and consists of a 100mm concrete block, 50mm cavity and a 140mm concrete block. Its for a foundation for an extension.
Whilst I'm here conflicting reports what mortar mix to use some say 3:1 for foundations and 4:1 for above the ground, others say 4:1 is good for all work!
Thank you
Whilst I'm here conflicting reports what mortar mix to use some say 3:1 for foundations and 4:1 for above the ground, others say 4:1 is good for all work!
Thank you