What drill

[billozz]

If I'm using the straight into brick screws for installing a upvc window do I use the same size drill? I. E. 7mm drill for 7mm screws? Or do they grip the brickwork my being 1mm or so smaller.
Thanks
Bill

 

[motorbiking]

Are you using Frame fixers? If so use the size recommended for the plastic plug. It grips when you screw it in.

 

[billozz]

Thanks for the reply, I was going to use concrete or brick screws, no rawlplug needed just straight into brick but not sure if the dia of screw should be same as drill. With those framers do they just push straight through the pvc into the wall? Always wondered about these, as you can probably tell I haven't done this before lol.

 

[motorbiking]

I would use frame fixers. They aren't expensive and yes you just drill, tap them in with a hammer until the plug is flush with the frame and then screw in ideally with an impact driver, if you have one. If you haven't fitted a window before make sure you have plastic or ply packing blocks to get everything level and expanding foam to seal everything.

 

[billozz]

OK thanks appreciate the help

 

[Munroast]

I would experiment a little with the same materials, my first go would be a hole a little bigger than the root /minor diameter

would also be very careful screwing longways into a brick that it would split the brick

 

[Wayners]

Thunder bolts is same size bit

 

[^woody^]

Whoever makes the screws will specify what size bit to use.

 

[^woody^]

Are you using Frame fixers? If so use the size recommended for the plastic plug. It grips when you screw it in.

Those are hammer fix and the wrong fixings for plastic windows. They will pull the frame in and distort it. The correct type are sleeved anchors that pull a wedge forward and tighten without pulling the screw inwards

 

[motorbiking]

was used to provide the diagram.
https://www.toolstation.com/fischer-pvcu-window-fixing/p36482

Either way, the frame needs to be properly packed.

 

[ronniecabers]

If using 7mm Diamter concrete screws ( we use a m7.5 concrete screw in varying lengths as do a lot of the UPVC trade) , then a 6mm masonary bit should be sufficient , just beware if its red brick , red brick dust clogs up the screws and jams your drill as screwing in , just make sure hole is plenty deep enough for excess brick dust, or fully cleaned out. Not a fan of hammer ins at all due to potential for missing and hitting the frame ( accidents happen! ). Never had a concrete screw fail yet , providing the material you are screwing into is solid, and not breaking up. As motorbiking and Woody say though , make sure the frame is packed level so it can't distort or move as you screw them in