The best large window well cover depends on your well’s measurements, shape, and mounting surface. For extra-large egress wells, compare the 59-by-38-inch Vercraft kit and clear polycarbonate alternative. The 46-by-22-inch Just Cover It model suits rectangular wells, while its 39-by-16-inch version fits smaller openings. A 44-by-19-inch plastic cover is designed for wells no larger than 40 inches long and 16 inches deep.
| Cover | Listed Size | Best For |
|---|---|---|
| Vercraft heavy-duty kit | 59 x 38 inches | Large egress wells needing a frame and clips |
| Clear polycarbonate cover | 59 x 38 inches | Large wells where light transmission matters |
| Heavy-duty plastic cover | 44 x 19 x 15 inches | Wells up to 40 inches long and 16 inches in projection |
| Just Cover It cover | 39 x 16 inches | Smaller wells needing UV-resistant polycarbonate |
| Just Cover It rectangular cover | 46 x 22 inches | Rectangular concrete, brick, or wood wells |
Vercraft 59 x 38-Inch Egress Cover Kit

This large window well cover combines a polycarbonate panel with a metal-reinforced support frame. Its sloped design is intended for outdoor use, and the included kit contains an aluminum frame, crossbeam, L-brackets, mounting hardware, and five stainless steel clips.
Best for: Buyers covering a large egress well who want a complete assembly kit and guided DIY installation. The included illustrated manual and QR code provide installation references, while the clips are designed to help secure the panel against displacement from wind or snow.
Consider: Measure the well carefully and confirm that the sloped panel and frame suit its shape before ordering. The listed size is 59 by 38 inches.
Clear 59 x 38-Inch Polycarbonate Cover

This clear cover is sized for large window wells and is made from UV-resistant polycarbonate. The product description says the material is designed to resist yellowing and cracking while allowing natural light into the basement. Mounting hardware and step-by-step instructions are included.
Best for: Homeowners with a well close to the listed 59-by-38-inch size who prioritize a clear cover and light transmission. It is also a practical choice for buyers seeking included installation hardware and a cover described as reusable and washable with soap and water.
Consider: The available details do not specify a reinforced frame or clip system. Confirm the mounting arrangement and the well’s dimensions before purchase.
Heavy-Duty 44 x 19-Inch Plastic Cover

This plastic basement window well cover measures 44 by 19 by 15 inches. Its stated purpose is to help keep rain, snow, small animals, and debris out of a window well while allowing light to reach the basement window.
Best for: Buyers whose wells measure no more than 40 inches in length and 16 inches in projection from the house, as specified in the product details. It may be a better fit than the 59-by-38-inch covers for a smaller opening.
Consider: Do not choose it for a well exceeding the stated fit limits. Measure both the length and projection rather than relying on the cover’s outside dimensions alone.
Just Cover It 39 x 16-Inch Cover

This USA-made cover uses high-strength polycarbonate and includes mounting hardware. Its UV-resistant coating is intended to maintain clarity over time, and a built-in 1.5-inch backsplash adds structural rigidity. The product is described for window wells, crawl spaces, and window covers.
Best for: Buyers with a smaller opening close to 39 by 16 inches who want polycarbonate construction, included hardware, and a reinforced backsplash. The UV-resistant coating is a relevant feature for covers exposed to sunlight.
Consider: This is substantially smaller than the two 59-by-38-inch options. Check the dimensions and shape of the well to avoid choosing a cover that leaves part of the opening exposed.
Just Cover It 46 x 22-Inch Rectangular Cover

This rectangular, high-strength polycarbonate cover measures 46 by 22 inches and includes mounting hardware. It has a UV-resistant coating and a 1.5-inch built-in backsplash for added rigidity. The product is specified for concrete, brick or paver, and wood wells.
Best for: Buyers with a rectangular well made from one of the listed compatible materials who need a size between the smaller 39-by-16-inch cover and the 59-by-38-inch options.
Consider: This cover is not compatible with metal window wells, according to the product details. Check the mounting surface as well as the measurements before choosing it.
Buying Guide: How To Choose A Large Window Well Cover
Which dimensions should you measure?
Measure the well’s width and projection from the house, then compare those numbers with the product’s listed dimensions and fit guidance. Also check the well’s shape and how the cover is expected to sit against its edge. A cover described as 59 by 38 inches is not automatically right for every well with a similar area; the individual sides and mounting layout matter.
Should you choose polycarbonate or plastic?
Polycarbonate models in this selection include UV-resistant features, and several are described as high-strength or heavy-duty. The 44-by-19-by-15-inch option is identified as plastic. Compare the material description, dimensions, and included parts rather than assuming that all clear covers have the same construction.
Does the mounting surface matter?
Yes. The 46-by-22-inch Just Cover It model is specified for concrete, brick or paver, and wood wells, and explicitly excludes metal wells. Other product details list hardware or a frame kit but do not fully describe every compatible surface, so verify fit and installation requirements before buying.
What features help with installation?
Look for included hardware, clips, a frame, and clear instructions if you plan to install the cover yourself. The Vercraft kit lists an aluminum frame, five clips, mounting hardware, and illustrated instructions. Other listings mention included hardware and step-by-step directions, but feature details differ by model.
Frequently Asked Questions
What size cover is best for a large egress well?
Among these options, two covers are listed at 59 by 38 inches. Compare that size with your well’s actual dimensions and mounting requirements before selecting either one.
Which cover includes clips and a frame?
The Vercraft 59-by-38-inch kit lists an aluminum frame, crossbeam, brackets, mounting hardware, and five stainless steel clips.
Which option is specified for a metal well?
The 46-by-22-inch Just Cover It model is explicitly not compatible with metal wells. Check the other listings’ installation details if your well is metal.
Can a clear cover let light into a basement?
The 59-by-38-inch clear polycarbonate cover and the 44-by-19-by-15-inch plastic cover are described as allowing natural light into the basement.