Why is my grab bar loose?

A loose grab bar is almost always telling you one of four things: the small set screws holding the bar to its flanges have backed out, the screws that hold the flanges to the wall never reached solid wood, water has softened the wall behind a flange, or the tile around it has cracked. The first is a two-minute fix. The rest mean taking the bar down and putting it back into studs. Until you know which it is, nobody should lean on it.

The point of a grab bar is to be there in a slip. The Consumer Product Safety Commission's checklist for older adults asks for at least one secure and easily graspable grab bar^[5] in every tub and shower, and a bar that moves is not secure.

First, find out what is moving

Hold one round flange flat against the wall with your hand and move the bar with the other. Then do the same at the other end.

• The bar moves but the flange does not. The connection between bar and flange is loose. This is the easy one.
• The flange moves on the wall. The fasteners behind the cover are not holding. This needs remounting.
• The wall moves, crunches or feels soft. The problem is the wall itself, usually water.

Cause 1: loose set screws

Many grab bars are two parts: flanges screwed to the wall, and a bar that slips onto them. On Moen's design, the bar is held onto each mounting flange by set screws,^[1] which are M5 set screws turned with a 2.5 mm hex wrench, and the box includes two spare set screws.^[1] Other brands use similar small screws, often on the underside of the flange.

If these are loose, the bar can rock or spin. The federal ADA standards, written for public buildings, state plainly: "Grab bars shall not rotate within their fittings."^[2] Find the set screws, tighten them firmly with the right hex wrench, and test again. If a set screw is missing or stripped, replace it with the maker's part.

Cause 2: the screws missed the stud or went into anchors

If the flange itself moves, look under its decorative cover. Grab bar makers are clear about what those screws go into. Moen says the screws must go into a wood stud for a secure installation,^[1] and that both ends of the bar must be over a wood stud unless the maker's own SecureMount anchors are used.^[1] Moen also notes that conventional mounts often allow only one or two screws into the stud, which makes installation less secure,^[1] so an older bar may have been marginal from the start.

Ordinary drywall anchors are a common culprit. TOGGLER, which makes heavy-duty drywall anchors, says industry safety standards recommend a quarter of an anchor's tested ultimate load as a reasonably safe working load,^[3] and that pulling a load away from the wall greatly reduces what an anchor can hold.^[3] A person catching themselves on a bar pulls outward and down, again and again, until the anchor loosens or tears the drywall.

A flange screw that spins without tightening is a sign of this. Do not just drive a bigger screw into the same hole. Find the stud, move the bar so both flanges land on stud centers, and drill fresh pilot holes. If the studs are not where the bar needs to be, use the anchor system the bar's maker sells for that bar, or have someone add wood blocking behind the wall.

Cause 3: water behind the flange

In a shower, water runs down the wall and can work into screw holes. Moen suggests silicone caulk on the back of the mounting plate to guard against water penetration,^[1] and a bar installed without it may have let water into the wall for years.

Signs: drywall that is soft or crumbles around the flange, paint that bubbles, grout that is dark or missing, or a musty smell. Mold can hide on the back side of drywall,^[4] and the EPA advises that water-damaged materials should be dried within 24 to 48 hours to prevent mold growth.^[4] A bar in a wet wall cannot be fixed by tightening; the wall has to be repaired first.

Cause 4: cracked tile

Tile is hard but brittle. A bar mounted over tile can loosen when the tile under a flange cracks, often from a screw driven too tight. Look for hairline cracks radiating from the flange. Replacing a cracked tile is its own job; see how to replace a cracked tile.

Was it really a grab bar?

Sometimes the loose bar is a towel bar someone has been using for support. Towel bars are usually held by small anchors and are not built for that load. See why a towel bar keeps pulling out of the wall, and put a real grab bar next to it.

Keep it from happening again

Moen's warning asks owners to check the bar periodically after installation to be sure all screws are secure.^[1] A quick pull and a look at the flanges now and then catches loose set screws before they become a fall. See how to check grab bars and railings for a full routine, and how to install a grab bar in a shower if you are remounting it.

Stop and call a pro if

• The wall behind the flange is soft, wet, stained or smells musty.
• The bar is on tile and the tile is cracked, or you do not know what is behind the tile.
• There is no stud where the bar needs to go, and the wall would need opening to add blocking.
• You find pipes or wiring behind the flange.
• The bar keeps loosening after you have remounted it into studs.

Getting it fixed

A loose grab bar is a small, common handyman job. Browse grab bars and accessibility, find handyman businesses around Blacksburg, or read more handyman answers. When you are ready, describe the job on Loclis and local businesses quote it.