I want to make some modifications to a downspout, so I'll need to
drill into the downspout (= sheet metal) and masonry (to attach strap
to mortar layer between brick).
I figure I need a masonry bit for the masonry, but do I need a
"special" bit for the sheet metal, or will my plain jane bits (which I
usually think of as for wood) do fine?
A bit for wood will work ok for aluminum.
It migt have tendency to grab as it breaks through.
Best bet is to slip a piece of wood between the downspout and the masonry.
This will let you have a more solid backer for the aluminum and will keep
you from hitting the masonry and dulling the bit.
Any decent sharp bit will do fine, but use a center punch first to
keep it from walking around and messing up the finish on the
Keep in mind that some experts do not like to drill into brick mortar
because freeze-thaw cycles will cause problems with the brickwork.
They prefer drilling into the brick and using plastic screw plugs. It
may be slower, but you won't be doing dozens of holes, so any decent
carbide masonry bit will work just fine.
Tapcon bit and screws to match the bit for the masonry portion.
I don't use bits for the sheet metal part. I use #6 Stainless 1/4" hex head
screws 1/2" long.
Some people use 1/8" bit and 1/8"x 1/4" pop rivets. Yes the standard high
speed drill bit.
Please come visit http://www.househomerepair.com
I just use self-tapping hex-head screws, commonly called pole-barn
screws around here, for the metal-to-metal joints. Use the smallest that
will work- the pointy ends inside the pipe are what the leaves catch on.
Fast and painless, compared to trying to line up loose parts from the
top of the stepladder. Just stick the screw in the driver bit on the
cordless, poke, and pull the trigger.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.