In a couple of months I will hopefully have another stove – this one is going to be installed in my office (which used to be a double garage).
As I have no chimney I’ll be coming up out of the stove in single wall pipe and then changing to twinwall just before it turns 45 degs and goes though the wall.
Given that the wall is 9″ brick with no cavity what’s the quickest/neatest way to put a 7″ diameter hole through it at 45 degrees?

Diamond core drill

Do they do core drills that big?

Neat will be tough, you may need to do some making good

I dunno really, cut a ‘letterbox’ and rebuild around it?

Diamond drilling rig will be the neatest/quickest, but far from cheapest.

Cheapest option will be to chain drill the perimeter of the hole with a standard (long) masonry bit, then chisel out whats left and make good afterwards.

DIY?
Speak to your local toll hire company – HSS, Speedy, Banson etc about core cutters.
I’ve hired one before now to put a 4″ dia hole on a wall.
Presume they go larger but just how one might hold a 7″ one in place, and put pressure on it….. 😯

Edit – LOL – seems we all typed the same thing…. 😛

Do they do core drills that big?

HSS will hire you a mounted drill. Good for up to 200mm. Not sure if it’ll do angles

http://www.hss.com/imagshop/guides/og_520.pdf

but just how one might hold a 7″ one in place, and put pressure on it…..

Starting it at 45 degrees would be the bit I’d like to see

Hilti certainly make rigs that work at angles. You need the whole rig (which would bolt to the wall and hold the drill itself) to keep the tip under control as you start off.

The more I think about it, the more I’d be inclined to use a Stihl saw and open up a 16″x7″ rectangular hole.

16″ is a guess BTW, I’m crap at trig

You could cut it with a Sabre blade saw for brick eg http://www.toolstop.co.uk/index.php?option=shop&page=shop.product_details&product_id=9109&l=uk&utm_source=google&utm_medium=base

Get it up through the roof. Save yourself mega ball ache and a bit of cash. Stoner had a pic recently of his flue,the one you’d need.

You need a Shaw shanked drill bit.

Get it up through the roof. Save yourself mega ball ache and a bit of cash.

Hmmm. I’d rather not put a hole in the roof really. Wasn’t it the roof to Stoners mancave which was fairly bare? My roof has already been finished with kingspan and has been plasterboared/skimmed and I don’t fancy messing with it.
Cost is not nec. an issue as I’ve been given the stove and twinwall by my sister who doesn’t need it any more – so I’m not too bothered by having to buy a few extra bits.

Just take a big chisel & wrecking bar & hammer your way through. It’ll be just as easy as trying to drill, faster, and just backfill the voided area with rubble & concrete. There’s be much less to hire, too.

shaped charge 😀

Aldi were doing SDS Drills cw drills/chisels, £40.

core drills come with a pilot drill bit, so as long as you drill the pilot hole all the way through you should still be able to use the core attachment- Just need to take it easy and don’t rush it.

caveat – how you get it at 45 degrees though will be pot luck.

caveat – how you get it at 45 degrees though will be pot luck.

Lasers.

i would just get chuck norris to punch through 😆

Might be easyer with a good old club hammer and a sharp cold chisel, once the pipe is in place patch in around it with sand/camant mix to tidy it up a little.
Wher are you located?

i wouldn’t even think of core drilling it, you won’t be able to start it at an angle, you’ll struggle to get a bit at 7″, and the torque on the drill will be huge, if it doesn’t break your wrists. the easy way is mark your hole, us a small bit to start (7 mm) stitch your way around the mark, move up to a bigger bits until the holes start to join, big chisel and hammer the rest

This plus THIS
Single pinch bolt into wall, set your angle and cut the hole.
You don’t need to hold the drill as it’s mounted rigidly to the frame and the angle will be cut at whatever you set it at – I use these daily so ignore the usual “naysayers” and you’ll save a whole load of repair work making good.

Drill through both skins of bricks with a 7 or 10mm long masonary bit, this gives you a point of reference, then knock a couple of bricks out on the inner skin, above and below the drilled hole, then go outside and remove a couple of bricks above the drilled hole.
That’s the difficult bit done,all you have to do is then trim it out with a lump hammmer and cold chisel till the pipe fits.
For gods sake dont waste your money on core bits and diamond drill rigs, not really practical to hold something that big at head height.
Sometimes the best solutions are the simplest and cheapest.

The point is that he WON’T HAVE TOLD HOLD IT at head height FFS!
One 12mm hole and it holds itself on the wall.
No time lost in having to knock bricks out.
No time lost in having to repair a fookin great hole.
No money wasted in cement, plaster, etc to repair the unnecessary damage done by an numpty with a hammer, chisel and drill bit.
The IT experts are in with advice for the specialists again…….

in a solid brick wall i would go with hammy’s advice here mate. find a local hire shop that isnt a rip-off national brand and save yourself a day of making good.
obviously ignore what i said above, it was just a joke, chuck norris would knock the whole bloody building down

we do it virtually every day. you cant do it hand held you need a jig.. go to your nearest hss and hire the drill the bit an extension and the jig you ll also need a 10 mil bit for the pilot BUT as the 45 degree angle will mean that the pilot wont touch the surface before the first edge of the core..

ps core drills SHOULD NOT be used on hammer..

That’s a big glory hole…are you showing off? 😆

I’d core it but I usually pay a bloke to do it for us!

It’s probably quicker and cheaper to go through the roof and fit a flue flashing kit. The flue will be cheaper as angle sections are expensive plus you need to suport the flue outside if you go through the wall. I was asking the same questions for my workshop and the local installer said roof every time.