ICF Extension-Attaching to the existing walls

[Wilbur1969]

Hi

We are looking at building a side and rear two storey extension and I would like to use ICF for the wall construction, it looks a good self-build option, uses minimal skilled labour and is relatively quick to construct, my first question is how would I tie in the ICF blocks to the original brick and block walls? I was thinking of using rebar secured into holes drilled into the brickwork, interested to know  what others have done.

Edited September 29, 2022 by Wilbur1969

[Vijay]

standard wall ties? https://www.screwfix.com/p/sabrefix-wall-starter-kit-stainless-steel/56037?kpid=56037&ds_kid=92700065972061616&ds_rl=1249407&ds_rl=1241687&ds_rl=1245250&ds_rl=1245250&gclid=CjwKCAjwhNWZBhB_EiwAPzlhNiBRZStejfxw3WdXtkAPcl9bSVZT_S--brU4-QZaYIJ96ElOvZiBPBoCfNEQAvD_BwE&gclsrc=aw.ds

 

That's how I'm attaching my internal walls to my ICF

Edited September 30, 2022 by Vijay

[markc]

Main thing here is tying foundations together. Brickwork can and does move slightly without any problems, a concrete wall has very little give or flex so any differential foundation movement can/will open cracks in the brickwork. Ensuring no heave or settlement is the key in the new foundations