There are lots of reasons to drill a brick wall. Often because you want to screw something to the wall like a batten, molding, hook, bracket or to hang a picture/clock or fix a flat screen TV to the wall for example.
Or you may need to drill a larger hole in a brick wall for a cable, a pipe or a vent to pass through it.
There are dozens of different types of wall plugs and anchors available depending on how heavy the item you are screwing to the wall will be. Most will have a guide on the packaging to help determine what is strong enough, if in doubt go slightly more heavy duty rather than less..
Whatever size of hole you need to drill through brickwork or masonry and whether you have a hammer drill or want to drill through brick without a hammer drill (sometimes that's better anyway) I'll explain all of the do's and don'ts so you get the job done right, easily and safely.
Tools you might need depending on the size of the hole you want to drill and what the hole is for:
Never drill directly above or below a plug socket in case there are cables.
Check there are no pipes as well, if unsure use a pipe & electrical cable detector to be safe.
Masonry (brick-work) drill bits are very different to metal or wood drill bits
You can never use wood or metal drilling bits to drill holes in masonry, you must use specific masonry drill bits designed for masonry.
Masonry bits are excellent for drilling bricks, Thermalite or concrete blocks, mortar (cement), concrete and some tiles as well.
Masonry drill bits are available with a normal round shank like in the picture to the right (I like Carbide tipped Dewalt masonry bits) that can fit in a standard keyed or key-less drill chuck that most people would own.
If you have an SDS masonry hammer drill you will need specially designed masonry drill bits for SDS chucks (Makita SDS drill bits are pretty good).
Generally when using masonry bits you will drill with a hammer action although this isn't always necessary and sometimes better to avoid.
If the brick or block you are drilling is particularly brittle, using a hammer action can actually just shatter & annihilate the material making it impossible to get a strong fixing into.
If you keep drilling holes but your Rawl plugs aren't biting (the plugs spin in the hole) then this may well be the reason. Try again without the hammer action on, a slightly smaller drill bit and go much slower to see if that helps.
I won't go any further here as there is much more information on choosing the best drill bits here so check that page out first and come back if you need to.
There are four main types of drill you could use to drill a brick wall with:
The best drill will depend on the size of hole you need to drill and the density of the material. The bigger the hole, the more powerful a drill you will need.
I find a battery hammer drill is adequate for drilling a few 4-8mm holes and a normal shank drill bit is OK as well.
If I have a lot of holes to drill and they are 6mm+ I will use my 110v power hammer drill with an SDS bit which is a bit heavier but much faster and more efficient to drill multiple holes in brick work with.
I only use a rotary hammer drill for much larger applications and very rarely for carpentry itself.
Unlike timber that is generally soft(ish), pliable and whereby sometimes you don't even need to drill a pilot hole before you screw into it, masonry materials are too hard and dense for that (there are some exceptions we'll get into later) and you'll need to drill a brick hole first.
In most instances in order to screw something to a brickwork wall you will need to use Rawl plugs as well and therefore need to choose the correct drill bit for the rawl plug size you are using:
Colour coded by size, Rawl plugs come in; (Always double check the packaging on your plugs)
For general carpentry work, you will most commonly use red and brown Rawl plugs with 6g - 18g screws that have Pozi-2 screw heads. You can buy assorted boxes of Rawl plugs.
It is really easy to increase the size of a hole in masonry with a larger drill bit. So if in doubt drill a brick hole with a smaller drill bit first then increase if needed.
Once you have marked the position of the hole and have chosen the correct drill and drill bit, you are ready to get drilling into the brick wall.
If the surface of the wall is smooth, to prevent the drill bit from wandering you can either use a hammer and nail punch to whack a point into the plaster or brick work for the drill bit to locate into, or start with a smaller drill bit first that is easier to control.
If your drill has different speed settings, for soft masonry use the slowest setting and don't turn on the hammer action - rotary only.
If the material is very dense and hard, opt for a faster speed and turn on the hammer action as well.
Ideally you want to use the slowest possible speed that will get the job done
When you drill a brick wall with a masonry/hammer drill set the clutch (torque) low so that it will kick in and stop the drill. Adjust this higher as needed, but it is there to stop the drill spinning if the bit gets jammed. Without it, people have broken their wrists because the drill bit gets stuck and the drill keeps spinning..
When the holes get bigger and the fixings need to be stronger as you are fixing something heavy to the wall, more heavy duty wall anchors are needed instead.
When you need a strong fixing in brick work walls or concrete, heavy duty wall anchors work in a similar way but can take much heavier loads.
Examples might include fixing a TV to the wall or even a staircase. Generally for applications like these I will choose a Fischer Fixings of some sort. They are available in various lengths and sizes to suit different applications and are seriously strong.
Drilling a hole in a brick wall for these fixings is the same as above but for larger holes I am almost always using my SDS hammer drill with SDS drill bits which is designed specifically for this type of work. It is a heavy duty hammer action drill that can far better withstand the stresses of large masonry and brickwork holes.
You may need to use a smaller drill bit initially to drill a pilot hole and then move on to a larger one instead of trying to bore the whole amount in one go.
To drill a brick for larger holes still, you may need to consider a core bit. Similar to a hole-saw that you would use for timber, core drills are diamond tipped tubular drill bits that cut round the edge of a hole rather than boring right through it. This means they cut the least amount of material to get the hole drilled.
Core drills are more suitable for drilling hole in masonry for pipes or large cables to pass through and are therefore more often used by plumbers and electricians.
Kits are available with the most common hole saw sizes you'd need to drill a brick wall for pipes or cables.
How do you drill holes in brick walls? Use the comments box below;