4 inch hole under JOIST

[mrbg07546]

Hi.

I have a house where it is terraced and has a alley way. (Where I have a room above it)

I want to put a kitchen extracter fan vented outside. However I realised if I cut hole it may cause the JOIST to drop. Is there anyway round this?

 

[cdbe]

There are normally ways to do this, for example you could trim the joist:

But it's not really clear what you want to do.

 

[big-all]

extraction will be within the room so below the joists ??

 

[mrbg07546]

Picture attached

 

[23vc]

Have a boxed out section above the hood chimney to allow you to vent it further across.
Or use a non extracting hood and put an extractor fan in somewhere else in the room

 

[cdbe]

Moved it over or trim.

 

[mrbg07546]

Ok so move it over a tad to put it between JOISTS?

 

[23vc]

Put the big hole between the two JOISTS, yeah

 

[mrbg07546]

It might be lower then the yellow mark. If it’s low enough could I put it below the JOIST? For example 1 brick course? Or is that a bit risky?

 

[23vc]

Risky to put it below the JOIST, yeah. A few courses down and it may be ok, but that’s probably too low for your extractor hood

 

[mrbg07546]

I could put a helibar in I was thinking. Or some temp support and a very solid duct! But all a bit overkill so I will just drill to the right hand side a bit