Wall chase depth

[Mgrant]

What is the maximum depth you can go when chasing a pipe in to a wall? What does it mean by leaf when talking about cavity walls?

Vertical chases should not be deeper than one-third of the wall thickness or in cavity walls one third of the thickness of the leaf

 

[ShaunCorbs]

one thickness / brick and not the total depth including the cavity

 

[SimonG]

Cavity walls are generally made of 2 leafs. Inner wall and outer wall.

 

[Mgrant]

Thanks so on a 100mm block the maximum you could chase is 33mm?

 

[SimonG]

Plus the depth of the wall coating.

 

[ShaunCorbs]

Vertical chases should be no deeper than one third of the wall thickness – with standard 100mm bricks and blocks, that going to be 33mm, which is quite deep anyway – that’s not allowing for any plaster coating which could be 10mm so the maximum depth then works out at 36mm from the front face of the plaster.
Horizontal chases should be no deeper than one sixth of the wall thickness - with standard 100mm blocks, that going to be 16mm which is usually quite sufficient – that’s not allowing for any plaster coating.

 

[jaydebruyne]

I'm possibly going to be amending some heating pipe work that at the moment is run externally vertically down a wall from upstairs and boxed in. I've never chased a wall before but I'm assuming you just grind the two lines and chisel or sds the middle out? I'm aware of the depths of chases but is there a max width of a chase?

 

[ShaunCorbs]

Yes and depending on width might need a central one and might be best to hire a chaser and vac if property is lived in

You will be fine for two 15mm pipes

Don't forget to allow for expansion eg insulate pipes etc

 

[jaydebruyne]

Yes and depending on width might need a central one and might be best to hire a chaser and vac if property is lived in

You will be fine for two 15mm pipes

Don't forget to allow for expansion eg insulate pipes etc

They're 22mm pipes so including sleeving or insulating I'd need around 48-56mm..

I've just been looking at the Makita chaser.. *grin*

 

[ShaunCorbs]

They're 22mm pipes so including sleeving or insulating I'd need around 48-56mm..

I've just been looking at the Makita chaser.. *grin*

How thick is the wall and supporting / non supporting ??