Skylight Installation in Chicago, IL

What Skylight Installation Involves

Skylight installation is more than cutting a hole in your roof. It requires precise framing, proper flashing, and a weatherproof seal that can handle Chicago's extremes. We start by evaluating your roof structure, attic space, and ceiling layout to determine the best location and skylight type. Most residential skylights are either curb-mounted (raised above the roof plane) or deck-mounted (flush with the roofline). Curb-mounted units work well on flat or low-slope roofs, while deck-mounted models suit sloped asphalt shingle roofs.

The installation process includes removing shingles, cutting the decking, and building a curb or frame with pressure-treated lumber. We then set the skylight, apply self-adhered ice and water shield around the curb, and layer flashing to direct water away. The final step is re-shingling the field course up to the skylight and sealing all exposed fasteners. A proper installation should last 20-30 years, matching the life of your roof.

Materials and Methods We Use

We offer skylights from Velux and Fakro, both known for energy-efficient glazing and durable frames. For Chicago homes, we recommend double-pane, low-E glass with argon gas fill. This reduces heat loss in winter and blocks UV rays that fade furniture. Many units come with a built-in blind or shade, which is a smart add-on for rooms with western or southern exposure.

Flashing is where most skylight failures happen. We use step flashing and a continuous counter-flashing system, plus a self-adhered membrane that extends at least 6 inches up the curb. This prevents water from wicking under the shingles. We also install a flashing pan at the bottom of the skylight to catch any condensation or minor leaks. On steep roofs, we add a snow guard above the skylight to prevent ice dams from sliding onto the glass.

Cost of Skylight Installation in Chicago

Skylight installation costs between $1,500 and $4,000 per unit in Chicago, depending on the size, type, and complexity of the roof. A basic 2x4-foot deck-mounted skylight on a simple gable roof runs about $1,500 to $2,000. A larger 4x4-foot curb-mounted unit with a shade and remote control can cost $3,500 to $4,000. If your roof decking needs repair or your ceiling requires a light shaft, add $500 to $1,500.

We provide a free, itemized estimate before any work begins. Our quote includes materials, labor, and cleanup, so there are no surprise charges. We also handle any necessary permits, which typically cost $50 to $150 in Chicago. Most installations take one to two days, depending on the number of units and the roof's condition.

Signs You Need a New Skylight

If your existing skylight is older than 20 years, it may be nearing end-of-life wear. Common signs include condensation between glass panes, visible cracks, or water stains on the ceiling below. A draft around the skylight frame indicates the seal has failed, allowing air and moisture to seep in. If you notice granule loss on nearby shingles or peeling paint on the ceiling, water is likely wicking along the roof deck. Replacing a failing skylight now prevents rot and decay that can spread to the rafters.

Our Step-by-Step Process

1. Inspection and Measurement: We examine your roof structure, attic, and ceiling to identify the best location and any obstacles like wiring or ductwork. We measure the opening and check the roof slope.
2. Framing the Opening: We cut the roof decking and install a curb or frame using pressure-treated lumber. This creates a solid base that supports the skylight and prevents sagging.
3. Setting the Skylight: We place the skylight and secure it with ring-shank nails or screws. We then apply a self-adhered membrane over the curb, followed by step flashing and counter-flashing.
4. Shingling and Sealing: We reinstall shingles up to the skylight, overlapping them in staggered courses. We seal all exposed fasteners with roofing cement to create a watertight barrier.
5. Interior Finish: We insulate around the shaft, install drywall, and paint the trim. We also test the skylight for leaks with a water hose before we leave.
6. Cleanup and Inspection: We remove all debris and magnetic nails from your yard. We walk the roof one final time to confirm everything is secure.

Insurance and Warranty

Skylight installation is typically covered under your homeowner's insurance if it's part of a storm damage repair. If hail or wind from a spring thunderstorm damaged your skylight, we can document the damage and work with your insurer to file a claim. We are licensed and insured, and we offer a workmanship warranty on all installations. The skylight itself carries a manufacturer's warranty, usually 10 years on the glass and 20 years on the frame.

We do not install skylights on roofs with active leaks or rot without first repairing the underlying decking. That would only put the new skylight at risk. We'll be upfront if your roof needs more work before we can proceed.

Why Chicago Homes Need Professional Skylight Installation

Chicago's climate is brutal on roofs. Heavy lake-effect snow in winter can pile up and create ice dams, which force water under shingles and into skylight flashings. Spring thunderstorms bring hail that can crack glass and dent flashing. Extreme temperature swings cause materials to expand and contract, loosening seals over time. A professionally installed skylight is designed to handle these conditions, but only if the flashing and sealing are done correctly.

We've replaced skylights in Lincoln Park, Wicker Park, and Hyde Park where previous contractors used cheap caulk instead of proper flashing. That caulk dried out and cracked, letting water seep into the attic. We've also seen roofs where the skylight was installed without a curb, causing water to pool and rot the decking. Our method avoids these failures by using the right materials and techniques from the start.

Energy Efficiency and Sustainability

Modern skylights are more energy-efficient than older models. Low-E glass and argon gas reduce heat transfer, keeping your home cooler in summer and warmer in winter. This can lower your energy bills by reducing the need for artificial lighting and heating. We also recommend skylights with a U-factor of 0.30 or lower, which meets ENERGY STAR standards for Chicago's climate zone.

Sustainability matters to us. We recycle old skylights and roofing materials whenever possible. We also offer skylights with a solar-powered shade, which reduces standby energy use. If you're replacing an entire roof, we can coordinate skylight installation at the same time, saving you money and reducing waste.

How to Choose a Skylight Installer

Look for a roofing contractor with experience in skylight installation specifically, not just general roofing. Ask for references and check online reviews. Make sure they are licensed and insured in Illinois. A reputable contractor will provide a written estimate, explain the warranty, and show you examples of past work. We've been serving Chicago since 2005, and our team is GAF Master Elite certified. We stand behind our work with a satisfaction guarantee.

When you call us, we'll ask about your roof type, the room you want to light, and your budget. We'll schedule a free estimate at your convenience. We serve all of Chicago, including Logan Square, Bronzeville, and the surrounding suburbs. Our phone number is 312-313-3253.