whats the diffence between core drill & a percussion dri

[whitehaven]

Hi I have had a new flat roof, as part of building regs I have had to fit 70mm diameter core vents between the joists..i.e. drill through the facia board & fit the plastic vents.
Heres my dilema, having done about 10 vents so far, I have nearly broke my wrists because my drill spun round. On speaking to someone they say make sure you buy a drill with a safety clutch & this won't happen.
So great advice, checking online at B & Q & others I see differnt types of drills, What type do I need? core or percussion & wots the difference, would go for a cordless but doubt the battery would last it's charge for another 29 - 70mm dia holes so will go with an electric .
Any advice greatly appreciated

Thanks in Advance

 

[ColJack]

define "core" in this context..
what material are the facias?

core drills are for drilling big holes in brick, block or concrete walls, not wood or plastic facias..

you don't want percussion.. that's for masonary drill bits, not core drill bits..

 

[noseall]

One would normally use a hole cutter for timber.

 

[^woody^]

That extension is going to look like the Titanic with all those round holes in the fascia

Why didn't you fit a strip vent in a narrow soffit?

You just need a normal drill and a hole saw. A good cordless with a couple of batteries will do. Corded drills and ladders and heights don't tend to mix well

 

[joe-90]

That extension is going to look like the Titanic with all those round holes in the fascia

/quote]

 

[mattylad]

One likes apples, the other plays the drums

 

[r896neo]

you don't need a core drill, any decent sds drill will have a clutch in it, buy the shank adaptor and insert your current holesaw.