Put the grab bar where your parent already puts a hand for support, even if that spot is the towel bar (towel rail) or the sink edge. Fit it level, with the top of the gripping surface 33 to 36 inches (840 to 915 mm) above the finished floor, the range the US accessibility standards give for grab bars.
Those standards were written for public buildings, but at home they are still the most exact numbers to borrow. This walks through the room in the order your parent meets it: the toilet, then the shower, then the bath.
The height and the angle stay the same in every room
Keep every bar horizontal, measured to the top of the gripping surface rather than the middle of the tube. A horizontal bar gives a hand something to push down on, which is the move that does the work when someone stands up from a seat or steps over a tub rim.
A vertical bar is a different tool. It suits a spot where a hand grabs in passing, such as the way into a shower, and it fits a narrow strip of wall where a long bar will not. Where there is room, fit the horizontal bar first.
Two more sizes matter before you shop. Look for an outside diameter of 1 1/4 to 2 inches (32 to 51 mm), and leave a gap of about 1 1/2 inches (38 mm) between bar and wall so a hand wraps round it without knuckles scraping tile.
At the toilet, a bar beside the seat and one behind
The wall nearest the toilet carries the bar that does most of the work. It should run at least 42 inches (1065 mm) long, start no more than 12 inches (305 mm) from the rear wall, and reach at least 54 inches (1370 mm) out from it. That length carries it past the front edge of the seat, which is where a hand lands when your parent pushes up to stand.
The bar on the wall behind the toilet gives a second hold for sitting down and getting settled. Allow at least 36 inches (915 mm), with a minimum of 12 inches (305 mm) on one side of the toilet's center line and 24 inches (610 mm) on the other. Where the tank (cistern) or a pipe box leaves too little room, a 24 inch (610 mm) bar centered on the toilet is the accepted fallback.
The usual mistake is a bar set too far forward or too high. A parent then has to lean out to reach it, with their weight already moving. Before anyone drills, ask yours to sit on the closed lid and reach for the wall. Mark where the hand falls and measure that mark against the figures above.
Check the toilet paper holder (toilet roll holder) too. If it sits where the bar belongs, move the holder.
In the shower, one bar inside and one at the way in
Fit one bar inside the shower and one at the entry, on the wall your parent faces or reaches for as they step over the threshold. A bar only at the far end is the common mistake: the hand needs somewhere to land before the feet move.
Check the bar against the controls and the door. A bar directly behind the faucet (tap) gets in the way of the hand that turns it, and one that a glass door swings into will end up unused. Open the door fully and turn the shower on before marking anything.
Where the shower has more than one horizontal bar, set them at the same height, so a hand slides from one to the next without hunting. Add a non-slip rubber mat or self-stick strips to the shower floor, as the CDC home safety checklist advises. Then check the light: your parent should reach the switch with dry feet, not stretch across a wet floor for it.
At the bath, two bars on the back wall
A tub takes two bars on its long back wall: one at the 33 to 36 inch (840 to 915 mm) height, and one 8 to 10 inches (205 to 255 mm) above the rim of the tub, each at least 24 inches (610 mm) long. If your parent steps in at the faucet end, add a bar on that end wall too.
This layout suits a parent who still prefers a bath and gets in and out steadily. It does not remove the step over the rim. A bath seat used with the bars is one answer; a walk-in shower is another. Put both to your parent and let them choose.
One habit to name out loud: the tub edge and the soap dish are not handholds, however often they get used as one.
The wall behind the bar does most of the work
A grab bar is only as strong as whatever its screws go into. The same standards ask the bar, its fasteners, the mounting and the supporting structure to take a 250 pound (1112 newton) pull at any point, in any direction. That figure covers the wall, not just the bar.
In a timber-frame wall, that means fixing into the studs or into blocking added between them. Tile carries nothing on its own. Neither does drywall (plasterboard), whatever the packet of wall plugs suggests. On brick or block, the fixings have to be the right ones for masonry, set deep enough to hold.
A towel bar (towel rail) is not a grab bar, and neither is a heated rail or a shower curtain rod. If your parent already pulls on the towel bar to get up, that is the spot for a real bar.
Planning a remodel? The residential rules allow reinforcement in the walls instead of bars, sized so a bar can be fitted later. Ask for that backing behind the toilet, the tub and the shower before the tiles go on.
For tiled or masonry walls, book a professional fitter and ask what each screw will go into. Good questions are whether blocking needs adding and how they will reach it, which fixings they use for tile, brick or block, how they will find and avoid pipes and cables, and whether the finished bar will take a full pull at any point along it.
What to check before you buy
Ask your parent if you can stay close while they use the bathroom once, and say nothing while you watch. Notice which hand reaches first and where it lands. That tells you more than any layout diagram.
Then check the bar itself:
- a round profile between 1 1/4 and 2 inches (32 to 51 mm) across, so a hand closes round it
- a lightly textured or milled surface, which gives a wet hand more to hold than polished metal
- stainless steel or coated steel rather than a plastic rail
- flanges that cover the screws, so nothing catches skin or a towel
- a length that fits the wall you have, between corners, a window and the controls
- one bar or two, depending on whether your parent pushes up with one hand or wants support on both sides
Grip is worth a second thought. If a closed hand is painful, a slightly larger diameter is easier to hold than a thin tube, and the morning routine for a parent with arthritis has more ideas for stiff hands.
Start with the spot that is hardest now
Fit the first bar where getting up or stepping in is hardest today, then add the rest as money and time allow. Often that is the toilet. Sometimes it is the shower step.
If your parent is unsteady, or has already fallen, ask their doctor whether a home visit or an occupational therapist could look at the room with them. Bring a photo of the bathroom wall and the measurements above to that conversation; it saves a second appointment.
Light the route as well as the room. Where the path from bed to the bathroom is dark, a night light low on the wall makes the bar findable before a hand is needed, and leaving the bathroom light on does the same job for the last few steps. If seeing the room is the difficulty rather than the walking, a brighter bulb changes more than you would expect.
Common questions
How high should a grab bar be?
Between 33 and 36 inches (840 to 915 mm) above the finished floor, measured to the top of the gripping surface. Keep to that range at the toilet, the bath and the shower, and use the same height for every horizontal bar in one room.
Can a grab bar be fitted to tile?
Yes, provided the screws pass through the tile into a stud, blocking or masonry behind it. The tile holds nothing by itself, and a fitter with the right bit can drill it without cracking it. Ask before the first hole where each screw will end up.
Do I need a bar on both sides of the toilet?
Not always. The standard arrangement is one bar on the side wall and one on the wall behind. A parent who pushes up with both hands may manage better with support on each side, so watch how they stand before deciding.
Is a suction grab bar any good?
Not for taking weight. A bar has to be fixed into the structure of the wall so it holds a hard pull at any point, and a suction cup fixes into nothing. They work for a washcloth (flannel) or a mirror, not for standing up.
This article is general information, not medical advice. Please talk with your parent's doctor about their health.