Tying into stone wall cottage

[connick159]

Looking for some info about how best to tie in a new blockwork extension into existing stone cottage. Is it just a matter of using the regular wall starter kits (furfix) or is there specialist products for use in stone walled buildings?

 

Thanks

[scottishjohn]

drilling the stone work to attach what ever type you use will be the bad part of the job

will depend how rough and uneven the stone work is  and if really lumpy may be simpler just to drill for  each tie fixing as you go ?

just another buggering about job  as you get with old buildings all the time 

 

 

[connick159]

Thanks John.

 

[stevemac]

Hi there, I do not know if you are sorted yet, but this is the way we would do this for EH, national Trust.

 

Just google Helifix. Its a twisted Stainless Steel band about 5-8mm wide and about 1mm thick in lengths of about 3-4 metres. Just cut to length. You drill holes in seperate stones, or same stones to form loops, say 300mm in length. each end is fastened with Polyester paste pushed into the holes.Also, Helifix can be left as just tails to be set into your mortar. Clean the holes out first by pushing some Helifix into the holes and then twisting and withdrawing to pull the dust out. Blowing down a thin tube can work to, or using a thin brush on wire used for pipe cleaning.

 

When you put each end of the Helifix into the glued up holes, plunging it in and out a few times ensures everything will be bonding together. Helifix is available in various sections.

 

You can buy the Polyester from Harbro supplies, county Durham, you need tins of Clear Vertical and you will be supplied with a catalyst with it. The glue actually looks like axle grease! ?

 

Anyway, if your still stuck, let me know- Steve.

[stevemac]

Using Helifix allows for flexing down the joint, but I would tooth the new stone into the original fabric to avoid an unsightly joint running down.

 

Best wishes- Steve.