To not breach the flue

[amfisted]

We live in a bungalow which was built in the early 1970s. How thick are the internal walls likely to be? I read somewhere that non-load bearing, solid internal walls in a modernish house would be 100mm; not sure about load-bearing, but presumably considerably more.

I'm asking because I intend to drill some fixing holes through a wall on the other side of a chimney breast, and I don't want to breach the flue. Which I know is very unlikely, but best be prepared.

Ta.

 

[tony1851]

Usually, the walls are 100 brick or block around a flue, so no worries re fixings.

However, if the flue is a gas-fire flue, there is a small chance you might have flue blocks, which are thin-walled.

But if the fireplace is for a conventional fire, you should be OK.

 

[amfisted]

There are some redundant copper pipes in an enclosure to the side of the fireplace, so I think it might originally have had a back boiler which has since been replaced with a living flame gas fire.
Looking up the chimney I can see a tubular concrete flue, in sections, which is enclosed within a chimney of greyish bricks.

The fixings I'll be using will only be 50mm long, so I guess I'll be safe.