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The Natural Philosopher The Natural Philosopher is offline
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Default mounting a boiler onto a Breeze block wall

wrote:
On Nov 30, 4:53 pm, Andy Hall wrote:
On 2007-11-30 16:25:58 +0000, said:

How safe is it to fix a boiler of about 45Kg to a breeze block wall?
The manual states simply to fix it on a strong wall.
Breeze blocks are widely used for external wall (on the inner leave at
least), so I'm assuming it is safe.
Perhaps it is better to use suitable plugs...
Any suggestions?

Yes you can.

Keep in mind that the weight is predominantly in a downward direction.

You can use heavy duty long fixings suitable for the material.

I used polyester resin fixings for mine. This technique involves the
use of threaded studs of a diameter suitable for the holes in the
boiler mounting bracket, and of a length of (say) 100mm. Holes are
drilled into the wall 2mm oversize for the studs and cleaned out.
A special two part resin with one part containing mortar is injected
into the holes and the studs inserted. After a suitable time
(minutes to hours depending on resin and temperature, the bracket can
be fixed to the wall.

This method is ideal for heavy weights on breeze blocks because there
is not the risk of crumbling around the fixing.

Screwfix among others sell the materials


Thanks, I'll check it.
Meanwhile, I've forgotten a very important detail.
The wall at the moment is bare...no rendering, but I've planned to use
celotex insulation and plasterboard...I guess I'll have to use a
proper studding frame behind the boiler and then look for longer
screws (or these polyester fixings) to account for the thickness of
the studs.


I would be tempted to use a bit of 19mm MDF on some reduced depth studs
and plaster over that AND the board..use scrim tape between the
plasterbaord and tehe MDF to avoid cracking.

Ive done this a few times, and it makes for a very stable and easy to
use surface for screws and the like. Anytime I try to fix to
plasterboard and rip out the screws, I cut a bit out, notch the studs,
let in the MDF and plaster over...




On the other hand, it may seem a bit wacky but what about fixing the
boiler straight to the bare wall and then later on fixing the
insulation and plasterboard all around the boiler? The cold bridge
shouldn't be an issue as the boiler is on when it's cold outside.


So you will lose even MORE heat that way...

At the moment I haven't really made my final decision...I just prefer
to mount the boiler now and get the heating system going. The drywall
can wait.


No. Dop teh drywall first and boiler up later.

Its a piece iof **** to knock up stud work with a bit pf MDF or ply on
it and the rest plasterboard..if money is available use ply throughout
instead of plasterboard actually. Skimming is the nastiest bit and thats
a LOT easier if there is no boiler in the way.