You have a ground-floor window that bothers you, a free Saturday and a drill in the garage. Are DIY window safety bars a realistic project for you? Often, yes. But one question comes first: is that window a way out of the house? If it is, the install is the easy part and the exit is the hard part.

SWB lists a typical Model A install at 15 to 30 minutes. The manual has you drill pilot holes and use the included anchors, so this is not a no-drilling job. If you can mark a layout, drill straight and follow a manual, installing bars on windows can be a manageable homeowner project. That time does not count the planning: measuring, choosing the right model and checking local rules.

Window bar installation also depends on what the window sits in. Wood frames, brick, concrete block and stucco all behave differently under a drill. Masonry and irregular frames are where many people stop and call a pro. SWB offers Model B for wall-mounting on masonry, stucco and irregular frames, with a catch we cover below.

The word “safety” in this keyword deserves a pause too. Some people mean bars that stop a break-in. Others mean something that stops a fall. SWB bars are security bars, not fall-prevention devices. If you want the full process first, read our guide to window bars installation, then come back and decide what fits your window.

Start with the room, not the bars. Under the 2021 IRC, section R310.1, basements, habitable attics and every sleeping room need at least one operable emergency escape and rescue opening. There are limited exceptions, such as a basement used only for mechanical equipment. The Boulder County building department explains these rules in its guide to emergency escape and rescue openings.

The opening has to work for a person in a hurry. R310.1.1 says it must be operable from inside “without the use of keys, tools or special knowledge.” The same chapter sets size and height numbers:

• Net clear opening of at least 5.7 square feet, or 5 square feet at grade floor (R310.2.1).
• Net clear height of at least 24 inches and net clear width of at least 20 inches (R310.2.2).
• Bottom of the opening no more than 44 inches above the floor (R310.2.3).
• If the opening is below grade, an area well of at least 9 square feet and 36 inches (R310.4.1), with a permanent ladder or steps if it is deeper than 44 inches (R310.4.2).

Now the part that matters for bars. R310.4.4 covers bars, grilles, covers and screens over escape openings or area wells. They must leave the required net clear opening, and they must be “releasable or removable from the inside without the use of a key or tool or force greater than that required for the normal operation of the escape and rescue opening.” In plain terms, bars on an escape window cannot depend on a key, a tool or extra strength to open.

Section numbers change between editions, and your city or county may adopt a different one. Always confirm with your local building department. Our page on window bars and fire code goes deeper on this.

The fire service makes the same point from a safety angle. The NFPA Security Bar Safety sheet warns that some security bars “can trap you in a fire” and “can also keep firefighters from getting in to rescue you.” Its advice is to find at least two ways out of every room and to make sure every exit, including barred windows, opens easily from inside.

Match the model to the job the window does. Model A costs $85 per core module. It telescopes from 35 to 65 inches in height, has a modular width of 16 inches per module (stack modules for wider windows) and 5.25-inch bar spacing. It is galvanized steel with electrostatic paint, and it mounts to the frame or the wall. It has no integrated quick-release, so do not plan it for a bedroom or basement escape window.

Model B is also $85 per core module, with a height range of 35 to 61 inches. It is wall-mounted, which suits masonry, stucco and irregular frames. SWB itself lists Model B as not rated for fire code or egress. That means it goes only on windows that are not escape openings.

Model A/EXIT is quote only and sold online. It has a 35-inch base that telescopes to 65 inches high and a 43-inch base width that expands with modules. SWB describes it as its egress-compliant model and the only one with a built-in quick-release: a hand-operated lift-bolt release from inside, rigid from outside. Whether your installed window complies is decided by the building official, not by a product page.

Width is simple arithmetic. At SWB's 16-inch module width, a window about 32 inches wide needs two modules. If your window is taller than the telescopic range of the model you want, those bars are not suitable for it.

Treat the steps below as a planning checklist, not a replacement for the manual in the box. The manual is the authority for hole placement and anchors.

1. Decide what the window is. If it serves a sleeping room, basement or habitable attic, treat it as an escape opening until your building official says otherwise.
2. Call your local building department. Ask which code edition applies and whether bars on that window need a permit or inspection.
3. Measure the opening's height and width. Compare the height with the telescopic range (35 to 65 inches for Model A, 35 to 61 inches for Model B) and count modules by width.
4. Pick the mount. Model A can be frame- or wall-mounted. Model B is wall-mounted.
5. Check what you will drill into: wood, brick, block or stucco. If you cannot tell, or the material crumbles, stop and call a pro.
6. Follow the manual: mark the layout, drill the pilot holes and set the included anchors.
7. Check that the bars are firmly attached. On an escape opening, confirm the required opening is still clear and the release works by hand from inside. Let every adult in the home practice it.
8. Test your smoke alarms and add the window to your next fire drill.

Budget the bars first. Model A and Model B are $85 per core module, so a window that needs two modules is $170 in core modules before anything else. Model A/EXIT is quoted individually. Our window bars cost guide breaks down what else to plan for.

Good security window bars installation is dull on purpose: measure twice, anchor into solid material and test the release. The same discipline applies whether your bar installation is on a garage window or a first-floor bedroom. The difference is that a bedroom window carries exit rules the garage window does not.

Sometimes the better answer is a pro. Searching for window security bars installation near me makes sense when DIY stops being the safe option. A local installer can also tell you how your area handles permits, though the building department remains the authority.

Consider hiring help when:

• The wall is brick, block or stucco and you do not have the right drilling experience.
• The window is on an upper floor and you would work from a ladder.
• The window is a bedroom or basement escape opening and you are unsure about the release.
• The frame is rotted, loose or out of square, so anchors would have nothing solid to grip.
• You are not comfortable following a manual that involves drilling into your home.

If you hire someone, ask them to show you how the bars open from inside, and ask whether the work needs a permit. A good installer answers both without hesitation.

Renters face a different question. Drilling into a frame or wall changes the property, so check your lease and get your landlord's approval in writing before you start. Our page on window bars for apartments covers the renter side in more detail. Fire safety rules do not relax because you rent: the same exit logic applies to a sleeping room in an apartment.

DIY window safety bars are not fall protection. SWB bars are security bars, and their 5.25-inch bar spacing does not contain small children or pets. Do not count on them to keep anyone from falling out of an open window. The NFPA sheet notes that a window guard or gate, or a window stop or wedge, can keep a child from falling out of an open window. Those are different devices for a different job.

They are also not a substitute for a way out. Do not add locks or any step that needs a key or tool to open a bar over a bedroom or basement escape window. Every person in the home should be able to open the exit quickly in the dark, without special knowledge.

Finally, bars do not replace smoke alarms. The NFPA Smoke Alarms at Home sheet recommends alarms in every bedroom, outside each sleeping area and on every level, including the basement. It says to test them monthly and replace them at 10 years. The security bar sheet also recommends a home fire drill twice a year.

Put it together and the rule is short. Bars decide who can get in. Your exit plan and your alarms decide how everyone gets out.