chimney removal

5 replies

user135 · 31/12/2017 10:58

hi,

I asked my builder to remove my chimney and gave them the keys to carry out the work. However after they did the work I became aware that there is supposed to be some sort of steal beam ?. I wasn't aware of this and the builder is no longer in contact. When I look in the attic there doesn't appear to be a steal beam, what should I do about this, do I need a structural engineer ?

I also found out that you should notify the council, however I didn't know and don't think my builder did this.

I'm a bit worried, thanks

OP posts:

namechangedtoday15 · 31/12/2017 11:09

You don't necessarily need a steel - we had a chimney removed all the way through the house (so nothing needed supporting by a steel). But you do generally need building regs approval.

BuzzKillington · 31/12/2017 11:13

You definitely need building regs.

What have they supported the chimney with if they haven't used a steel? They may have used gallows brackets? Many BCBs will not accept them because of issues with the fixings.

Either way, you definitely need a structural engineer to provide calculations.

BuzzKillington · 31/12/2017 11:14

... if they have removed the stack as well, it's not an issue.

PigletJohn · 31/12/2017 12:37

some builders rely on corbelled brickwork, or just take away the lower part and hope the top doesn't fall down. Often it doesn't. Especially bad in a semi or terrace when your neighbour does the same thing.

You need a better builder, and Building Control inspection.

You will have to send a drawing of the proposed support to BC before starting work (though they will have a process for emergency repairs). Chimney removal is so common that the builder can copy an earlier job (or you can look up recent plans on the council website for a similar house and copy it. A ruler, pen, large piece of paper and a setsquare are all you need). For this kind of job builders often don't do calculations, they just specify a steel that is sure to be plenty.

It is neater to take down the entire stack into the loft and rebuild the roof over it. This also reduces future leaks and maintenance.

Sorry this will cost more than doing it properly in the first place.

BuzzKillington · 31/12/2017 12:55

I am a BCO and we wouldn't accept without calculations.

Flip