How to Check Bars, Grilles and Well Covers for Release From Inside

Why this matters

Security bars, decorative grilles and window well covers are installed to keep things out: burglars, raccoons, leaves, snow, a toddler wandering the yard. Put one over a bedroom's escape window and, unless it releases from inside, it also keeps the occupant in. The failures are rarely the product. They are the four screws somebody added to stop a dome cover blowing off, the padlock on a quick-release lever, the hinge painted shut, the release lever behind a dresser. A window can measure perfectly and still be useless because of what is bolted over it. Every trade that works around basement windows or exterior openings, landscapers, gutter and siding crews, pest techs sealing wells, handymen fitting bars, is in a position to see this.

The stance is owned elsewhere: see related, The Egress Window and the Trades That Quietly Defeat It. Measuring the opening itself is its own card: see related, How to Measure an Egress Window Net Clear Opening.

The rule, and what each word excludes

Under the 2021 IRC, as adopted by your jurisdiction, R310 allows bars, grilles, covers and screens over an emergency escape and rescue opening only where, in substance, they are releasable or removable from the inside without the use of a key, a tool or special knowledge, and without a force greater than it takes to operate the escape opening itself, and only where they do not reduce the net clear opening below the required size. Check the current edition for the exact wording and any local amendment. Read each condition as a test you can fail:

• No key. A padlock, a keyed lever, or a key kept "on the hook by the door" fails. In smoke, at night, nobody finds a key.
• No tool. A cover held by screws, bolts or wing nuts that need a wrench fails. So does a release that needs a coin or a screwdriver.
• No special knowledge. A release only the homeowner knows the trick to, or one hidden where a guest or a child would never look, fails. The test person is someone who has never seen it.
• No extra force. A lever seized with rust or paint, or a cover so heavy it takes a strong adult braced on a ladder, fails, because the comparison is the force needed to open the window.
• No reduced opening. A grille that, once released, still leaves its frame across part of the opening has to leave the clear opening at or above the minimum.

The same section sets minimums for the area well itself, the excavation outside a below-grade window. In substance: a horizontal area of at least 9 square feet, with a horizontal projection and width each at least 36 inches, and a permanently attached ladder or steps where the well is deeper than 44 inches, usable with the window fully open. Check your adopted edition for the full ladder rules.

The steps

1. Identify which openings are escape openings before judging any bar or cover. Bars over a kitchen window or a garage window are a security question, not an egress one. Bars or a cover over a bedroom window, or over the escape window of a basement with habitable space, are the ones that matter. Find out which window serves each sleeping room; where a room has two qualifying windows, the code needs one, but note any barred one anyway because the customer may not know which one their family would use.

2. Find the release from inside, the way a stranger would. Stand inside the room and look for the release without being shown. A lever, a push bar, a pull ring, a hinged frame with a latch at a reachable height. Then ask the customer to show you. If you could not find it and they could, that is the special-knowledge failure. Note where it is and whether furniture blocks it.

3. Operate the release yourself, with the force the window takes. Open the window first, normally. Then work the release. It should move with about the same effort the window needed, swing or lift the bars clear, and stay clear. A seized lever, a hinge painted shut, or bars that swing back and block the opening fail. Do not use a tool to free a stuck release and then record it as working; record it as stuck, and free it only with the customer's consent. Keep your hands clear of the hinge side as a heavy grille swings, and on an upper floor keep your body inside the room while it swings out.

4. Check the well cover from below, not from the yard. A cover that lifts easily from outside can be impossible from below. Open the window, then reach up from the window or, on a deep well, stand on the well ladder with the window open and push the cover the way an occupant would. Look for screws, bolts, latches that only work from outside, and hinges or gas struts that have failed. Some covers are rated by their makers to be opened from below under a stated snow load and some are not; that is in the product data, so where snow sits on covers in winter, read it rather than assuming. Use the ladder only if its rungs are sound and attached, and keep one hand on it; a well floor is a hard landing.

5. Check the well's own dimensions and its ladder. Tape the horizontal projection out from the foundation and the width along it at their narrowest, and the depth from grade to the well floor. Where the depth is over 44 inches, confirm a ladder or steps are present, permanently attached, and usable with the window fully open; a casement sash that swings into the ladder's path defeats it.

6. Restore everything to how the customer keeps it. Re-latch the bars and close the window. If you swung a cover open, close it. Leaving a barred window released after a test hands the customer a security gap they did not ask for, which is how the next tech gets blamed for the break-in.

7. Tell the customer what fails and what the fix is, in writing. Name the opening, the device, which of the conditions it fails and what would make it pass. You do not remove a customer's security device on your own judgment; with their consent, removing four screws from a cover is a minute's work, and that consent goes in the note.

Worked example: a basement bedroom and a main-floor bedroom

A pest tech sealing entry points around a ranch house's foundation does the check on the two openings that serve sleeping rooms. The diagram shows what they found.

BASEMENT WINDOW WELL (section)    MAIN FLOOR BARS (inside)
                                  +------------------+
   dome cover, 4 screws           | bars hinged on   |
   into well rim  -> FAILS        | left, swing out  |
    ____________                  |                  |
   /            \  grade          | release lever,   |
==+              +=====           | lower right,     |
  |   ladder  |  |                | PADLOCKED        |
  |   rungs   |  | well 48 in     |  -> FAILS (key)  |
  |  =        |  | deep           |                  |
  |  =        |  |                | window behind:   |
  |  =  [ casement ]              | double-hung      |
  |___________|___ well floor     +------------------+
  projection 38 in, width 40 in

The basement bedroom. The escape window is a casement, previously measured by the window contractor at a qualifying clear opening, in a well 48 inches deep. The well's horizontal projection out from the foundation is 38 inches and its width 40 inches, so its area is 38 times 40, 1,520 square inches, over 144 is 10.56 square feet. Against the well minimums: area 10.56 passes the 9 square feet, projection 38 passes the 36 inches, width 40 passes the 36. The depth of 48 inches is over 44, so a ladder is required, and one is there: steel rungs set into the well wall. With the casement cranked fully open, the sash stands clear of the rungs. So far, everything passes.

Then the cover. The customer's dome cover is a clear plastic bubble, and to stop it lifting in wind, four screws run through its flange into the well rim. From the open casement, the tech pushes up on the dome: it does not move. It fails the no-tool condition outright, and because the bedroom has no other qualifying window, the room's only way out ends under a screwed-down lid.

The main-floor bedroom. The escape window is a double-hung with a hinged steel grille fixed over the exterior. Inside the room, at the lower right of the frame, is a release lever that swings the grille out on its left-side hinges. The release itself would pass, operating with a firm push about like raising the sash. But the customer has put a small padlock through the lever, with the key hanging on a hook in the hallway. That fails the no-key condition: a fire that blocks the hallway also blocks the key.

The written note:

• Basement bedroom escape window: well size and ladder meet the minimums (well 38 by 40 in, 10.56 sq ft; 48 in deep with an attached ladder). The dome cover is fastened with four screws and cannot be opened from inside. Remove the screws, or replace the cover with one designed to open from below, so it can be pushed open from the window.
• Main-floor bedroom escape window: the grille's release lever works but is padlocked, with the key kept in the hall. Remove the padlock so the lever can be used without a key.
• Both items were left as found. The customer was shown the lever and the cover screws.

Why the pest tech did not fix the cover on the spot. It is the customer's security and wind choice, and removing it without asking leaves them with a cover that blows off in the next storm. The customer agreed to the screws coming out and asked about a replacement cover; the tech backed out the four screws with consent, pushed the dome open from the casement to confirm it now lifts, closed it, and updated the note.

What would change the call. If the well had been 42 inches deep, under 44, no ladder would be required and step 5 would pass without one. If the grille's release had been on the outside, no padlock would matter; a release that can only be worked from outside fails the whole rule. If the bedroom had a second qualifying window with no bars at all, the barred window would not be the required opening, and the padlock would go on the note as a recommendation rather than as the room's only way out.

How you know you checked it right

• You found the release yourself before being shown, and recorded whether you could.
• You operated every release and pushed every cover from the inside, with the window open.
• The well's projection, width, depth and ladder are recorded as numbers and a yes or no.
• Every bar and cover is back the way the customer keeps it, unless they consented to a change that the note records.

References

• International Residential Code, 2021 edition, R310 (emergency escape and rescue openings, area wells, and bars, grilles, covers and screens), as adopted by your jurisdiction
• Window well cover manufacturer data (inside release and snow load)
• See related: Egress Window Code Compliance Per IRC R310
• See related: How to Measure an Egress Window Net Clear Opening