Large angle grinder (and owner) to borrow

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Permalink Reply by Dominic Hinshelwood on August 19, 2020 at 19:27

What are you trying to cut through? Have you got the correct cutting disc for that material?

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Permalink Reply by Ben on August 19, 2020 at 21:58

Or why are you using an angle grinder? maybe you should be using a good masonry chisel and mallet to loosen the mortar around the brickwork, then just remove the bricks.

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Permalink Reply by Leanne on August 19, 2020 at 23:33

Thanks Dominic and Ben.

It's a skim (5mm) of plaster on about 15 mm of grey cement mortar type stuff then about 70 mm of brick. 

The cutting disc goes through it all like butter giving a good straight cut but just not to the depth that I need.

The plan was to cut as much as I could with the grinder then use that line to chisel through the rest of the brick, but I didn't expect the grey mortar stuff to be so thick. It's also pretty solid stuff if I was to try and chisel it all out. 

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Permalink Reply by Ben on August 20, 2020 at 9:54

Ok thats fine. But if its easy to come out...... i would do it slowly by hand, that way you have more control you and dont have to source a great big scary grindery thing you will only use once or have to us it. Worse pay someone to use it!

This is how we did it when we did ours:

1) Mark the parameter as deep as you can with the grinder you have

2) Then starting from the inside out, as to not damage the parameter plaster/mortar you want to keep, remove all the plaster and mortar with a chisel and mallet (about a tenner form anywhere, and you'll use it for a whole multitude of diy jobs), leaving the exposed brick. 

3) starting from the middle again loosen the mortar between the one or two of the bricks in the middle and knock through the bricks into the fire place behind. 

4) From then on you will be able to carefully remove all the bricks you need out to the parameter to require. Any snagged bricks that are left around the parameter just break away with the chisel.

Im NOT A BUILDER and dont know exactly your situation but i hope that helps.

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Permalink Reply by Leanne on August 20, 2020 at 11:58

Thanks Ben for how you did it. Much appreciated!

I did similar but used the grinder a lot more which sped things along. With the perimeter cut I did a chess board of cuts across the front with the grinder and the surface plaster and mortar pretty much fell off the wall. I then used the grinder to cut into the mortar between the bricks and with a couple of bashes with a chisel and hammer, it made surprising light work of the job. 

And no need to borrow or rent a big scary grinder!

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