How to install a tension shower rod: height, fit and final tension in 15 minutes

Result: a straight or curved tension rod that sits level between the two walls of your tub or shower alcove and holds the curtain and liner without drilling. Time: about 15 minutes for a straight rod, longer for a curved one. Tools: a tape measure, a pencil or painter's tape, a level and a cloth. Moen describes its TR1000 tension rod as needing no tools at all.

Before you start: does the rod fit?

Two checks save most failed installations:

• The width. Measure wall to wall at the height where the rod will sit, at the front edge of the tub and a bit further in. Alcove walls are rarely perfectly parallel, so use the smaller figure. It must fall inside the printed range on the box. Keeping it away from either end of the range is common advice for spring rods, not a rule any maker publishes. For the Moen TR1000, Moen's spec sheet gives 44 to 72 inches.
• The height. The height follows from your curtain, its hooks and the gap you want above the floor. Moen calls it personal preference; our shower curtain rod height guide has the sum and examples.

Step by step

1. Measure wall to wall at rod height

   Measure at the height you have chosen, at the front and a little further in, and note the smaller figure. Compare it with the range on the rod.

2. Mark the height on both walls

   Make a small pencil mark or a piece of painter's tape on one wall, then transfer it to the other with a level. Tile rows are not always level, so do not rely on the grout lines.

3. Prepare the contact spots

   Each mark should land on a flat tile face – not across a grout line, on a caulk bead or on a rounded trim tile. Shift the height by an inch or two if needed. Wipe soap film off both spots and let them dry; a dry bathroom is better than one right after a shower.

4. Slide the rings on

   Closed curtain rings cannot be added once both end caps are against the walls, so thread them onto the rod first. Open hooks or snap rings can go on later.

5. Fit the rod and set the tension

   How you do this depends on the rod. Spring rod: set it slightly longer than the opening, compress it, angle one end in at the mark, swing the other end up to its mark and let the spring push out. It should be clearly under pressure, not just touching. Twist rod: Moen's instruction sheet for the TR1000 series is a good example – place one side at the desired height, expand the rod out to the other side until it stops, then hold the larger tube and twist the smaller one clockwise three full turns until it is firmly locked.

6. Level the rod

   Put a level on the middle of the rod and adjust the second end until it reads level. On a twist rod, loosen slightly before you move it and lock it again afterwards.

7. Hang the curtain and liner

   Hang the decorative curtain outside and the liner inside the tub. Nothing else goes on the rod: no towels, no hooks for a caddy.

8. Check after a day

   Look at the rod the next day. If it has slid down, the grip or force is too low; if it has become shorter, a threaded rod may be unscrewing; if it bows, the load is too high for the span. Re-tension and check again.

Spring rod, twist rod or curved rod: what changes

No maker publishes a comparison showing that one type holds better than the other; the force you actually reach and the surface decide. Our page on spring vs twist tension rods goes into the mechanisms.

Installing a curved tension rod

Moen's spec sheet for its DN2170 curved tension rod, which fits 57 to 60 inches, shows the extra steps of a curved rod: position the rod with the row of holes in the middle facing down, extend it button by button until the end brackets are close or flush with the walls, then use a plastic wheel to turn a nut that adjusts out by up to three quarters of an inch to add tension, and snap the covers over the brackets. Bob Vila notes that the double-curved Zenna Home rod in its roundup needs two people to install. Curved rods also need a near-exact width; the curved tension shower rod guide compares them.

A straight rod that installs this way

Other straight rods, most of them with seller data only, are compared on our tension shower curtain rod overview.

Typical mistakes

• Measuring once, at the wrong height. The width at the tub rim can differ from the width at rod height.
• End caps on a grout line or caulk bead. This is where most shower rods start to slide; see tension rods on tile.
• A spring rod that only touches. Without real compression it will drop the first time the curtain is pulled.
• Over-tightening on soft surfaces. If a cap ends up above the tile, on paint or drywall, more force means more risk of marks. Pressure sits on two small pads.
• Using the rod as a shelf. Wet towels and caddies add load the rod was never sold for.

Safety notes

A tension rod has no screws. It holds only as long as friction at the caps is larger than the load, so a rod that drops can land on someone in the tub. Hang only the curtain and liner, check the rod after the first day and from time to time after cleaning, and stay below the load rating if the maker states one – Moen states none for the TR1000. If a tile cracks or loosens where a cap pressed, stop using the rod there and have the tile checked. If the rod keeps coming down despite all of this, why your tension rod keeps falling goes through each cause.