Cut Hole Through Wall With Aluminum Siding

Position the pattern on the sheet metal where the hole needs to go and draw a line around it using a permanent marker.

Cut hole through wall with aluminum siding.

6 pull the wall cap and duct out of the wall. Apply a thick bead of silicone adhesive. Line the blade up with the drawn line. Drill pilot holes through the screw holes on the wall cap and through the mounting block siding and wall.

I have an ancient dewalt 660 with a circle cutting attachment. Don t lock the trigger on. Tons of companies make similar tools. Like twist bits hole saws chuck right into your drill and will cut through thin gauge sheet metals like aluminum and steel.

When using a hole saw to drill the hole in aluminum siding keep the saw slightly tilted to one side to reduce the chances that the hole saw will bind while cutting the hole. If the drill tilts to one side it may bind and jerk. Hole saws cut bigger holes for large holes a hole saw gets the job done cleanly and quickly. A bimetal hole saw is easiest to use because it ll chew through an occasional nail without dulling and cut cleanly through vinyl or aluminum siding.

It s basically a smallish router and used all the time for cutting holes in drywall shower walls etc. Sometimes called a spiral saw or rotary cutting tool. Here s one that claims to come with a circle cutting attachment for 15. Open the power shears and slide the bottom blade under the metal siding.

Hold your drill firmly with two hands photo 4 and brace it against your leg if possible. Use a scrap of plywood as a backer for the hole saw s pilot bit and to protect your work surface. Assuming you ve got access from below to the joist space you can use tin snips also called aviation snips to cut the siding and a hole saw or reciprocating saw sabre saw or sawzall to cut. Create a paper pattern of the size and shape of hole you wish to cut.