I'm attempting to mount a bookshelf that weighs around 25lbs into a brick wall that's covered with plaster. I've got a masonry bit ready, but I'm only working with a regular drill and an impact driver (Dewalt 20V Max). I've tried to drill a pilot hole but haven't had much success. Before I risk damaging my drill or bits, I want to check if a plastic anchor can handle this weight, or if I should switch to a Tapcon screw instead. Also, do I really need a hammer drill for this task? I've read mixed opinions on whether a hammer drill is necessary, especially for older brick, but I'm feeling a bit uncertain about pushing it too hard as it is.
3 Answers
Yeah, there's a good chance drilling into that brick will cause some cracks. So be careful, and definitely consider switching to Tapcon screws; they’re designed for heavier loads and will give you better support than plastic anchors if you're looking for longevity.
Brick is typically soft enough for a regular drill with a masonry bit, but hitting that plaster might complicate things. Just make sure to drill directly into the brick rather than the mortar, and keep your pre-drilled hole smaller than your fastener. If you're using a 3/8" fastener, aim for a hole between 1/8" and 1/4" in diameter. Too small can crack the brick, while too large won't hold properly. With a regular drill, take it slow, let the bit cool often, and don't push too hard. Also, Tapcon screws might be a safer choice for that weight, especially if you're concerned about durability!
I highly recommend picking up a hammer drill if you can. I've had great luck with a Bauer hammer drill from Harbor Freight, which is pretty affordable and really effective at drilling through brick. You can definitely get away with a regular drill, but it might take longer and give you uneven holes. Given the weight of your bookshelf, don’t rely on plastic anchors—Tapcons are a much safer option for heavy loads.
Right, just make sure to keep your drill bit cool. Those things can overheat and lose their effectiveness quickly!