Dad has finally agreed that one grab bar might be useful. Not necessary, naturally. Useful. There is a difference, and he would like the record to show it.
Now you have a real decision: install it yourself or hire someone. This is not mainly a question of whether you own a drill. It is a question of whether you can identify what is behind the wall, fasten the bar correctly, and test the finished work without guessing.
Start with Dad, not the hardware aisle. Ask him where he reaches when he steps into the tub, turns toward the toilet, or stands from the shower seat. Let him move through the bathroom at his usual pace. A bar placed where nobody naturally reaches is just a shiny towel rack with ambitions.
Choose the job before choosing who does it
Stand with Dad and mark the places where support would help. Do not decide the height from a photograph or from where your own hand lands. Dad may be shorter, taller, stiffer, or simply more particular than you. His hand is the one that has to find the bar.
Check whether he needs a vertical bar for stepping across an edge, a horizontal bar for steadying himself, or an angled bar that follows the motion he already makes. Look at the whole path, including the bathroom door, bath mat, toilet, towel rack, shower controls, and anything he must step around.
Then inspect the wall. Tile can hide studs, pipes, wiring, empty space, or an older repair. A hollow sound is not a building plan. Look for access from the other side of the wall, note where faucets and plumbing lines run, and find out what the wall is made of.
When doing it yourself makes sense
The job may belong to you if you can confidently locate solid framing or install the exact wall support required for the bar and wall type. You should also be comfortable drilling without striking plumbing or wiring, sealing holes in a wet area, following the fastener instructions, and repairing any tile you damage.
Before you begin, read the installation instructions all the way through. Confirm that every fastener and mounting part is present. Check that your drill bit is meant for the wall surface. Decide how you will control dust and keep Dad out of the work area until the floor is clean.
Do not improvise with leftover screws. Do not attach a grab bar to a towel bar fitting. Do not assume a wall anchor is suitable because it feels tight when you turn the screwdriver. The bar has to hold when Dad grabs it suddenly, from an awkward angle, with more force than he planned.
If you reach the point where you cannot prove what the fasteners are gripping, stop. A few small holes are easier to explain than a loose bar and a broken wall.
When hiring it out makes sense
Hire the job out if the wall is tiled, the framing is uncertain, plumbing may be nearby, the mounting instructions call for work you have not done before, or Dad needs several bars placed as one useful system. Hire it out, too, if you are already tired and trying to finish before driving home. Fatigue is not a power tool accessory.
When you call, describe the wall surface, the proposed locations, and whether you already have the bars. Ask who will inspect for framing, pipes, and wiring. Ask what mounting method will be used if a stud is not in the right place. Ask who repairs cracked tile or other wall damage.
Compare people by the work they describe, not by how quickly they say yes. A useful answer should include how they will confirm the wall support, seal penetrations in wet areas, position the bar with Dad present, and test the finished installation. Ask whether the person doing the work has installed grab bars in this kind of wall before.
Write down the agreed locations before drilling begins. Have Dad stand in the bathroom with the installer if he is willing. He may insist that everyone is making too much fuss, then move the tape mark two inches because that is where his hand actually goes. Those two inches are the point.
Check the finished work
Look at every mounting plate. It should sit flat against the wall, with no rocking, open gaps, sharp edges, or exposed holes. In a shower or tub area, confirm that the openings have been sealed as required for that surface.
Grip the bar with both hands and pull in several directions. Do not merely pat it and declare victory. Watch the wall and mounting plates for movement. If anything shifts, creaks, separates, or flexes, Dad should not rely on it until the installer corrects it.
Remove nearby towel bars or shelves that Dad might mistake for support. Put towels where he can reach them without leaning. Make sure the bath mat lies flat and the new bar does not force him into a twist to reach the faucet or shower controls.
Ask Dad to try the route while you stay close without steering him. Notice whether he finds the bar naturally. If he ignores it, ask why. The placement may be wrong, the grip may feel uncomfortable, or he may need time to make it part of his routine.
What to do tonight
Do not start drilling tonight. Put painter's tape where Dad thinks the bar should go. Ask him to walk through getting in, washing, turning, and getting out while fully dressed and while the floor is dry. Move the tape until his hand reaches it without stretching or twisting.
Take photographs of the marked wall and the opposite side of it. Write down the wall surface, the bar length, and what may run behind that area. If you cannot identify solid support with confidence, make the hiring call instead of making a hopeful hole.
Until the bar is installed and tested, keep the path clear, move loose items away, and remind Dad that the towel rack is still a towel rack, despite its years of unauthorized service.
When to ask the doctor
Tell Dad's doctor if his balance, strength, walking, or ability to step into the tub has changed, especially if the change was sudden. Also mention any fall, near fall, dizziness, faintness, new confusion, unusual weakness, or trouble standing that you have noticed.
Ask what movements Dad should avoid and whether someone should watch how he gets in and out of the shower. The answer may change the number, position, or kind of supports that will actually help. A grab bar can support a routine, but it cannot explain why the routine suddenly became harder.
Add this line to the good-week card
Dad can reach the bathroom support without stretching, and the bar does not move when firmly pulled.