Hi Guys,

I need a little advice about making a hole 500mm x 500mm for some
extraction ducting to go through.

How would i do it ? Do I need supporting ? and would a hole that small
require a lintern ?

thanks in advance !!

wrote:
Hi Guys,

I need a little advice about making a hole 500mm x 500mm for some
extraction ducting to go through.

How would i do it ? Do I need supporting ? and would a hole that small
require a lintern ?

thanks in advance !!

Some more info would be a start.

Do you mean a Lintel?

--
Sir Benjamin Middlethwaite

I guess the previous poster could have suggested which additional info
is required, so I will try to assist:
what material is the wall made of?
how much wall is at either side of the area earmarked for the hole?
how much wall is above the area?
what material is being used for the ducting?

If the wall is concrete block and you have alot of wall to both sides
of the hole and also a good amount of wall above then the job will be
much easier. It is never a bad idea to put a lintle in, as they are
easy and cheap to do, but so long as you are removing a hole from a
wall as described above (brick is also ok) then it should be able to
support itself while you do the job. I have taken slappings out of
stone built walls to a width of nearly 2 metres without the wall
collapsing in... but got a lintel in place as soon as afterwards as
much as from a safety perspective as to maintain the integrity of the
wall.

If brick or block then I would start at the top of the hole and chase
out some blocks using a drill. Then just use a small hilti (cheap
versions will also be fine) chisel remove the aditional bricks one by
one. If opting for a lintle then you will obviously need to take a
square slapping out, whilst if not doing this you should manage to
remove a hole resembling a circle.

Calum Sabey
NewArk Traditional Kitchens 01556 690544

wrote:
Hi Guys,

I need a little advice about making a hole 500mm x 500mm for some
extraction ducting to go through.

How would i do it ? Do I need supporting ? and would a hole that small
require a lintern ?

thanks in advance !!


If its square, you generally would chip out a space for a concrete
lintel and install that, then knock bricks out underneath..

If its VERY big you might use props and bars through the wall to support
it whilst you do it. But 500mm is only likely to loosen a couple of
bricks, and if they fall out, replace after installing the lintel.


If it's round it may not need the lintel .. you would have more or less
a 'brick arch' there.

In all cases you will have a little making good to do - some carefully
shaped bits of brick and mortar - clean up the ones that come out with
brick acid and reuse - to make it all look nice and tidy.