Window well cover broken, cracked, or missing: what to put back and what it costs

A window well cover is the cheapest part of this trade and the one that prevents the most expensive problems. At $150–$600 installed it keeps rain, snow, leaves, and the occasional rabbit out of the well, which is most of what silts a drainage bed and rots a sill. The two things that matter when you replace one are fit and, on an egress well, the fact that it must open from inside.

Check this first (five minutes, one tape)

1. Measure the well: width along the wall, projection out from the wall, and depth. Covers are sold to the well, not to the window.
2. Check whether the well is square-cornered or a rounded corrugated semicircle. Corrugated wells need a cover that follows the arc; a flat rectangle will not sit down on it and will hold water.
3. Ask whether the room inside is a bedroom. If it is, the well is an egress well and the cover has to be releasable from inside without tools. That rules out bolted grates and anything screwed down from above.
4. Look at what broke. Thin flat acrylic that cracked across the middle failed on snow load. A cover that blew off failed on fastening. A cover that sagged and filled failed on span. Each points at a different replacement.

What to put back

The pricing page carries these ranges alongside the rest of the work.

Why covers matter more here than in milder places

Two Des Moines realities do the damage. Snow is the first: an uncovered well is a collection basin, and every inch that falls in the yard falls into the well, then melts in place against your foundation during the first thaw and refreezes at night. The second is the freeze-thaw cycle itself. Water that sits in an uncovered well in March, freezes, expands, and thaws again works the anchors loose and pushes soil in behind the well. A $200 cover buys you years off the clock on a $1,000 to $3,000 well replacement, which is the single best return in this whole trade.

A cover also keeps the well clean, and clean matters more than people think. Leaves and grass clippings in a well break down into exactly the fine organic silt that plugs a gravel drainage bed from the top.

The code point people get wrong

If the room behind that window is used for sleeping, the well is part of an emergency escape and rescue opening, and the IRC is explicit (R310.4 in the 2018 edition, R310.4.4 in 2021): any cover, grate, or bar over it must be releasable or removable from inside without keys, tools, or special knowledge, and it cannot require more effort than opening the window. This is not a technicality. A child cannot lift a snow-loaded bolted grate, and a firefighter coming the other way loses time on it. If a previous owner screwed a steel grate down over a bedroom well, that comes off, and a code compliance measure is worth doing at the same time to check the opening size and ladder while we are there.

What we actually install

Fitted polycarbonate, sized to the measured well rather than to the nearest catalog size, sitting on the well lip so runoff sheds outward past the flange rather than into the well. On egress wells the fastening is designed so the cover lifts from below. On wells over 44 inches deep the ladder is worth checking at the same visit, since the IRC requires one (R310.2.3.1 in the 2018 edition, R310.4.2 in 2021, R319.4.2 in 2024) and older wells often lack it.

What to expect on the call

Send the three measurements and a photo from directly above. Covers are the one item we can very often price accurately without a visit, and they are frequently bundled at no extra trip charge with well work or a drainage rebuild that is already scheduled. We fit covers across Des Moines, Ankeny, West Des Moines, Urbandale, Johnston, and out to Waukee and Altoona.