DIY - Need to cut 4" hole through stucco wall

[Murpheeee]

I am installing a bathroom fan and bought a 4" hole saw to cut a hole through the wall and siding.
Turns out there is stucco underneath the siding and I blunted 2 drill bits just trying to drill a pilot hole before I realized thats what it was.
My hole saw it not going to cut through that stuff, its about 1" thick and hard as concrete.

So how do I get a 4" round hole through it?

 

[iamwiz82]

Get a good masonry drill bit and a hammer drill and make holes every 1/4"-1/2" along the perimeter, then knock it out.

At least that's what I would do.

 

[Murpheeee]

thats kinda what I was leaning toward....just wondered if there were any other options?

 

[rivan]

They don't make (as far as I know) masonry hole saws - iamwiz's method's the only reasonable one I can think of.

 

[dullard]

Originally posted by: iamwiz82
Get a good masonry drill bit and a hammer drill and make holes every 1/4"-1/2" along the perimeter, then knock it out.

At least that's what I would do.

Ditto. But you may be lucky enough to use a regular drill. It depends on how thick the wall is. I only mention this because renting a hammer drill can be expensive, but most people already have a regular drill. True, the hammer drill will work much better though.

 

[j00fek]

your fist

 

[bctbct]

Actually low pressure and slow speed you can probably penetrate 1 inch of stucco, if you only make it part through you should be able to knock out the rest of the hole in the same fashion as mentioned above.

Consider the bit one time use though.

 

[jmdeathsquad]

chainsaw?

 

[essasin]

You can either chip away at it like described above or get a sledge hammer and be accurate.

 

[AbsolutDealage]

Originally posted by: iamwiz82
Get a good masonry drill bit and a hammer drill and make holes every 1/4"-1/2" along the perimeter, then knock it out.

At least that's what I would do.

I would strongly suggest a non-cordless drill for this... (it's amazing how many peoply only own cordless tools these days...)

Of course, if you don't have one... you probably could rent the hammer drill for less than buying a new (corded) drill. Then again, you have to return the hammer drill

 

[oynaz]

Or loan the hammer drill from your brother-in-law. For some reason, brothers-in-law always onw the power tools you need. Strange but true.

 

[AbsolutDealage]

Originally posted by: oynaz
Or loan the hammer drill from your brother-in-law. For some reason, brothers-in-law always onw the power tools you need. Strange but true.

Hm... that's wierd. I must be that brother-in-law because I'd be surprised to find a hammer between the 2 that I have.

 

[Quasmo]

http://www.pegasusassociates.com/RoundHoleCutter.jsp

 

[AbsolutDealage]

Originally posted by: Quasmo
http://www.pegasusassociates.com/RoundHoleCutter.jsp

can cut through plywood, plaster and acrylic sheeting up to 7/8in thick or 1.75in thick if the opposite side can be drilled; can also cut through aluminum, brass, and metal sheets up to 1/16in thick

If that thing is only cutting plaster/acrylic up to 7/8ths... it has no chance against 1" concrete.

 

[MikeyIs4Dcats]

you COULD do it with a core bit, but you'd have to buy one or hire someone. Just get a sharp-nosed cold chisel and a hammer and bust through it.