Wall ties in door way

[mikeey84]

Hi, I'm blocking an external doorway, double skin of block with cavity, and I'm wondering what the best combo of wall starters and ties is.

If I use wall starters for both skins, will I need to tie the skins together?

Or would it be easier to do it another way?

If I use wall starters, will I need to do them for the full height, or could I get away with just using them part of the way (so I don't need 4 kits)

 

[23vc]

I’d say full height starters for both skins and the usual spacing of cavity wall ties throughout. Virtually no effort involved in either of those either so hardly worth considering skimping

 

[mikeey84]

I’d say full height starters for both skins and the usual spacing of cavity wall ties throughout. Virtually no effort involved in either of those either so hardly worth considering skimping

Part of my reasoning was that I have never used wall ties before. What's the "usual" spacing? And are the fish tail ones suitable? And do I just cut insulation to fit between them?

 

[23vc]

Assuming you’re doing full fill rockwool type cavity insulation, it’s these: https://www.screwfix.com/p/sabrefix...Ce-JeCoAyMDfk0iAu9BoCJLoQAvD_BwE&gclsrc=aw.ds

Vertical spacing 450mm, horizontal 900, so the cavity batts are the right size such that no cutting’s needed around ties.
In your case just do a couple of ties every other course of blocks.

 

[mikeey84]

Can I use celotex? Got a load left over from the ceiling. Do I just cut to suit? Do I need to tape the joints?

 

[^woody^]

8 fish tail ties for the outside. Same for the inside or 8 x 4" nails.

No wall ties required.

Celotex will need to be fixed to the inner leaf to give a minimum 25mm air cavity.

 

[mikeey84]

Do you mean the fish tail ties that I screw into the existing wall? And not between the 2 leafs?

 

[^woody^]

The ones like a L

 

[mikeey84]

Thanks!