Log Burner Flue Worry

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I live in a 2000 house, so plasterboard, batten, block, empty cavity, brick.

I'm thinking of getting a log burner in the front room, which will exit through the wall to the side of the house, so far so good...

Directly above the front room is my bedroom, which has an emperor size waterbed. I'm not sure on weight but it's going to be around 900KG in total.

Now here comes my worry, when the bricks get removed to fit the double flue is that going to weaken the area? Last thing I want is the log burner to be installed then the house falls apart
 
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Have you checked that the joists can handle 900KG?
 
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Have you checked that the joists can handle 900KG?
Nope but been fine for years, having waterbeds is fine as the load is spread.

I just don’t know if removing block and some brickwork will weaken anything
 
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Directly above the front room is my bedroom, which has an emperor size waterbed.
Seriously?

when the bricks get removed to fit the double flue is that going to weaken the area?
If the hole is large enough and directly beneath a point load, (joist end, beam etc), then yes, what ever is being supported becomes vulnerable. Most smaller flue holes can pass through walls no problem. But even small holes passing beneath lintel or beam bearings for example are potentially troublesome.

If the double flue is large enough and close to the ceiling, it may need a lintel/support over.
 
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Seriously?
Just looked emperor is what I want next, mine now is 6x7 foot but almost close enough :)

If the hole is large enough and directly beneath a point load, (joist end, beam etc), then yes, what ever is being supported becomes vulnerable. Most smaller flue holes can pass through walls no problem. But even small holes passing beneath lintel or beam bearings for example are potentially troublesome.

If the double flue is large enough and close to the ceiling, it may need a lintel/support over.
From floor to ceiling in the front room is about 2.3m high, the flue would exit about 1.5m.

Is that a risky height?
 
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