How to chisel 30mm into concrete floor ?

nelly_2

hire a chaser that has dust extraction it wont stop all the dust but whatever

Luckless_2

SDS drill would be best but depending on the concrete it may require channeling with a grinder first, the dust from a grinder will cause visability and breathing problems, a dust mask and goggles a must for a grinder. I would suggest renting a decent SDS drill and buying a grinder as they are cheap. I think all feeds to boilers have to be 22mm now to reduce the risk of flame out, could be wrong.

Bungarm2001 wrote: »

My OH uses an SDS drill for doing jobs like this.

BTW, did your plumber tell you to go down 30MM? I'm sure ours told us 45mm minimum...mind you, we were laying 22mm in plastic sleeving then into the concrete

Biggie

Bungarm2001 wrote: »

My OH uses an SDS drill for doing jobs like this.

Bit of info here > http://www.diyfaq.org.uk/powertools/sds.htm He loves the bluddy thing :rotfl:says they are far superior to your average hammer drill. You can get them from Screwfix.

BTW, did your plumber tell you to go down 30MM? I'm sure ours told us 45mm minimum...mind you, we were laying 22mm in plastic sleeving then into the concrete

The plumber told us the pipe will be 22mm but it needs at least 7-8mm clearance on top, I was therefore gonna go about 35mm deep.

markleedsuk

You will need about 50mm minimum depth on your chase. Yoru corgi needs to check the regualtions as you need 25mm minimum cover over the gas pipe not 7-8mm. (22mm pipe + 25mm minimum = 47mm min) not including sleeve.

amandalocks

A good site about sds drills:

Cknocker

1st thing - Corgi no longer exist, they have been superceded by the gas safe register, make sure your plumber is certified and has the correct certification, I'm not sure how Gas Safe works, but I dare say its the same as Corgi, for instance someoen could have a corgi registration to work on lpg but not mains gas.

If you don't want to make a mess hire a chaser with dust extactor, decent ones cost a fortune to buy and I doubt you will ever use one again!

You then need to chisel out the floor, you're best off buying a cheap SDS, make sure it has a rotary stop function, if its not a lot and you feel like a bit of hard work it should come out fairly easily with a hammer and chisel, the cover being asked for sounds way to shallow to me.

An SDS drill is not a hammer drill, it works in a different manner, a hammer drill uses fast rotation with a lot of minute low power blows, an SDS rotates slowly with a percussion action, similar to the action you see on a breaker fitted on the end of a digger, as has been said it is not the tool for hanging a picture!

27col

I once made a 25mm grove 4mtrs long in a factory floor using a Hilti SDS drill. I drilled 144 holes to a depth of 30mm across the doorway of the factory in order to install a drainage channel. I was surprised how easy it was. It was the first time that I had used an SDS drill. Brilliant bit of kit. Of course you tend to use what you have to hand. Hence drilling the holes rather than using a diamond blade or anything else. Whatever you use you will not avoid making dust.

Atelier

A SDS drill is the way to go. You will be able to extract bigger chunks of concrete than an underpowered hammer drill.

However, you will need to check the specification of the SDS drill to ensure that it has the ability to hammer without spinning the chisel bit (think it is called rotor stop)

t_r wrote: »

B&Q do a SDS drill for less than £40 and for DIY use its great

TR

ormus

SDS drill from screwfix, goes thro concrete like a knife thro butter. cheaper than hiring one.
and a cheap angle grinder. thats all you will need.

as been said, there will be a lot of dust!