How do you cut and return blockwork?

[zappastix]

Hi

About 1/2 hour ago I posted about having to cut a strip of brick & blockwork
to fit a new window - and what was the best tool.

Just Googling around to see what else I need to do, and to my horror
I have seen the price of Cavity Closers.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
MY QUESTION

What blockwork pattern do I need to achieve to do what is referred to as;

"cut and return the inside skin of block work"


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I will be removing a regular size door (aluminium/glass) bricking up 15 courses
(brick/block cavity) then cutting a 150mm strip (1 metre down) to accommodate
a new UVPA bathroom window.

There is a lintel that runs more than I need, which shows there was
a window in place before this door was installed.

Any help, tips, links to images etc, would be most welcome.

Thanks in advance.


Stephen

 

[noseall]

Retrospectively installing a tied-in blockwork return successfully would involve a lot of work and would not compete with cav' clodgers.

You could mortar-in some aerated block slips along with a strip of dpc but this again is fiddly.

Agreed, the cost of cav' clodgers is prohibitive but sometimes it is wiser to bite the bullet.

 

[^woody^]

1 tin of expanding foam

 

[simonjay]

Hi

About 1/2 hour ago I posted about having to cut a strip of brick & blockwork
to fit a new window - and what was the best tool.

Just Googling around to see what else I need to do, and to my horror
I have seen the price of Cavity Closers.

Stephen

The cavity closers I got from screwfix were cheapish. Just a strip of celotex / polystyrene with a DPM strip glued on (for wood windows). For uPVC dont even need the DPM. Just cut some celotex / polystyrene and push it in tight. How cheap do you want ?
Simon.

 

[zappastix]

Thanks SimonJay - that's the sort of cheap I want - I've got some of that celotex already.

Just shows you, wait long enough here, and you normally get a good and constructive answer.

 

[noseall]

I have to agree with anyone 'improvising' their own form of cav closer.

They are shockingly expensive for what they are.

As Woodstock has pointed out, ex-foam with strips of celotex is a good solution.