Measuring Tall Windows: What Goes Wrong and How to Avoid It

Fishers Window Treatments · 2026-09-18

Getting an accurate measurement on a tall or oversized window takes more than a longer tape measure, and the mistakes that show up later usually trace back to something missed during that first visit.

Why Size Pushes Hardware Past Its Limit

Standard shade hardware is engineered around standard window sizes, and once you're past roughly eight feet of drop or a width pushing toward ten or twelve feet, the parts built for an average window start working harder than they were designed to. A roller tube that's fine at six feet can start to sag or deflect in the middle at twelve feet wide, showing up as a visible bow across the top of the shade.

Weight is the other half of the problem. A tall drop means more fabric, and more fabric means more weight hanging off the same clutch or spring mechanism that a smaller window uses. Standard residential hardware has a real weight ceiling, and a lot of Fishers homes with two-story windows or a wide wall of glass in a great room bump right up against it without anyone realizing until the shade starts struggling to hold its position.

One Shade or More Than One

Motorized shades handle a multi-shade setup especially well, since a single hub or app can group several shades together and raise or lower them in sync with one command, which matters more on a wide window wall than it does on a single window where manual operation was always going to be a one-at-a-time task anyway.

Grouping shades this way also means a Fishers household doesn't need a separate remote for every shade on the same wall. One control point operates all of them together while still allowing individual adjustment when only part of the wall needs to change, like closing just the shade nearest the afternoon sun.

The grouping software on most current systems is straightforward enough that a homeowner can set it up after install without help, creating custom groups for different times of day or different rooms without needing an installer to come back and reprogram anything.

Where All That Fabric Goes When It Stacks

Splitting a window into multiple shades actually helps the stack problem, since each individual shade is narrower and often shorter than a single shade would have needed to be, meaning less fabric bunching at the top of any one section. A single oversized shade concentrates all that stacked fabric into one wide bundle.

For a Fishers great room where sightlines matter, several narrower shades with tighter individual stacks frequently look better raised than one enormous shade with a thick fabric bundle running the full width of the window, even though the fully lowered look is nearly identical either way.

This is one of the more overlooked reasons a split configuration ages better too, since a narrower shade's mechanism carries less weight over its lifetime, which generally means fewer adjustments and less wear on the clutch or motor over the years compared with one very large unit doing the same job.

Reaching the Control on a Window That Tall

Motorization adds cost, typically another $100 to $300 a window as a national range over a manual unit, but on a window this size it's solving a real functional problem, not just adding convenience. Manual control on an eight-foot drop is awkward at best and genuinely difficult at worst, so this is one of the few places where the added cost is close to mandatory rather than optional.

The upside is that motorizing a whole wall of shades at once, rather than one window at a time, often qualifies for a lower per-unit cost on the control hub or hardwiring work, since a Fishers installer is already running power and setting up the system for the first shade and the rest ride along the same setup.

Measuring and Installing on a Window That Big

Squareness is the other big one. A window that's even slightly out of square, which is common on an older or custom-built opening, needs measurements taken at more than one height along the frame, not a single number applied top to bottom, and on a very wide window it needs checking side to side as well.

Skipping that step is how a shade ends up binding on one side or leaving a gap on the other once it's installed. A Fishers installer measuring a tall or oversized window in person, checking multiple points and confirming access for both measuring and installing, catches these problems before they become an expensive reorder.

It's also worth checking the window's depth at the same time, not just its height and width, since some tall or custom windows have deeper trim or a wider sill that changes how much room an inside-mount bracket actually has to work with once everything else is factored in.

Getting an accurate cost picture for a window wall starts with an actual measurement, not a national average. A free in-home measure from Fishers Window Treatments breaks the pricing down section by section so you know where the budget is actually going. Call (317) 863-9966 to schedule one.

Frequently Asked Questions

Why does measuring a tall window take longer than a standard one?

A standard window usually needs one width and one height measurement. A tall or oversized window needs measurements at more than one point along the frame, since it's more likely to be slightly out of square, plus a check on access for both the measure and the eventual install, plus a look at stack height and hardware requirements for that specific size. Each of those adds time but also prevents an expensive mistake later.

What happens if a shade is ordered without accounting for the window being out of square?

The shade gets built to the dimensions it was given, so if those dimensions didn't account for the window being slightly wider at the bottom than the top, or vice versa, the finished shade can bind against the frame on one side or leave a visible gap on the other. It's a common enough issue on older or custom-built openings that a careful measure checks for it specifically rather than assuming a single measurement is enough.

Do two-story or stairwell windows really need special equipment to measure and install?

Often, yes. A window that's not reachable from the floor or a standard ladder often needs a taller ladder or scaffolding to measure accurately and install safely, and that access requirement doesn't go away between the two visits. It's worth asking upfront whether a quote includes that access cost, since it can be a meaningful part of the total on a genuinely hard-to-reach window.