Measuring Like a Pro: The 7 Checks Homeowners Forget Before Ordering a Frameless Door

Frameless glass doors can make a bathroom or shower look clean, modern, and open. But getting the right fit isn’t just about taking a quick measurement and hitting “order.” A few small oversights can lead to expensive mistakes like leaks, gaps, or a door that simply won’t fit.

Before you finalize your measurements, here are seven often-missed checks to make sure your frameless shower door fits perfectly the first time.

1. Check That Walls Are Truly Plumb

Even the best homes have walls that aren’t perfectly vertical. Use a spirit level to see if the walls tilt in or out, even a few millimeters can make a difference in how the door seals or swings. Frameless doors have very little room for adjustment, so it’s best to note any unevenness and share that with your supplier.

2. Measure Tile Overhangs and Corners

Tiles and trims can create small ridges or lips that affect the actual opening width. Measure from tile to tile, not from wall to wall. If you’re still in the tiling stage, make sure to measure again after tiling, the extra thickness can change your final dimensions more than you might expect.

3. Confirm Your Floor Slope

Bathroom floors often have a slight slope for drainage. If your shower area slopes, measure from the highest and lowest points of the floor to the ceiling (or curb) to understand the true height difference. This helps prevent doors that scrape the floor or leave gaps where water can escape.

4. Account for Hardware Clearance

Hinges, handles, and brackets all take up space. Forgetting to factor them in can lead to interference with walls, mirrors, or other fixtures. Always leave room for the hardware’s swing and mounting space, your installer or supplier can provide exact clearance requirements.

5. Verify Opening Direction and Swing Space

Think through how you want the door to open. Does it swing inward, outward, or both? Make sure there’s enough clearance from nearby toilets, vanities, or towel racks. It sounds obvious, but it’s one of the most common installation regrets homeowners report.

6. Inspect for Out-of-Square Openings

A shower or doorway that’s slightly wider at the top than the bottom can cause fitting issues. Measure the width at the top, middle, and bottom of the opening. If the difference is more than about 3 mm, note it, your glass will need to be cut to match that angle precisely.

7. Check Ceiling and Header Strength

If you’re planning a hinged frameless door, the top support or wall where hinges attach must be sturdy enough to bear the weight of the glass. Double-check that your header or tile backing has the proper reinforcement especially if it’s drywall or hollow material behind the tile.

Final Thought

Ordering a frameless shower door is a precision task. Spending a few extra minutes checking these details can save you a lot of stress (and cost) down the line. If you’re unsure about any of your measurements, it’s worth having a professional measure and verify before you order,  most suppliers offer this service.

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