# Integrity Windows — Full Content

## Summary
Integrity Windows is the trade name of M&D Enterprise Services LLC — a veteran-led installer of
premium, energy-efficient Lindsay vinyl replacement windows for residential and commercial
properties across the Fox Valley and western Chicago suburbs, Illinois. The company installs
windows only (it does not sell or install doors). It was founded by a team who spent more than a
decade as licensed real estate brokers and grew out of a long-standing relationship with the
owner of Lindsay Windows, a family-owned manufacturer in Aurora, Illinois founded in 1947.
Tagline: "Integrity…because it matters."

## Contact
- Phone: (630) 360-4945
- Email: mark@integritywindowsanddoors.com
- Website: https://integritywindowsanddoors.com
- Service area: the Fox Valley and western Chicago suburbs, IL — St. Charles, Geneva, Batavia, Aurora, Naperville, Wheaton, Elgin, Glen Ellyn, Oswego, North Aurora and surrounding communities.

## Leadership
Mark Metzger is the operational backbone of Integrity Windows. A former U.S. Navy
Commanding Officer, project management consultant, and licensed real estate broker, he brings
decades of leadership, logistics, and home-renovation experience. Every residential and
commercial installation is carefully planned and professionally managed. A skilled installation
team that has worked together for years, and works with the company exclusively, performs the work.

## Products
Window series (Lindsay Windows): Pinnacle (flagship ENERGY STAR vinyl window), ClimateSmart
(maximum thermal performance), SunView (high-performance Low-E glass), DiamondView (premium
appearance), CrownView (quality value), and Revolution (European-style tilt-and-turn with built-in
retractable screen). All are energy-efficient vinyl replacement windows suitable for residential
and light commercial applications. Integrity Windows installs windows only and does not currently
sell or install doors.

## Why Integrity
Premium, energy-efficient products; real-world insight into how window performance impacts comfort,
operating costs, and long-term property value; disciplined project management rooted in military
leadership; a seasoned installation team that works together exclusively; and a service philosophy
grounded in transparency, integrity, and long-term relationships.

## Instant Estimator
The website includes an instant estimator. Visitors select a property type (residential or
commercial), a window series, and the number of windows, then receive a ballpark installed range.
As a guide, installed vinyl windows in this market run roughly $450 (value series) to $1,800
(specialty tilt-and-turn) per window. Commercial projects carry a modest premium. The estimate is a
planning ballpark only — an exact, itemized quote follows a free in-person measurement.

## Frequently Asked Questions

Q: Do you serve both homes and commercial properties?
A: Yes. We install premium, energy-efficient replacement windows for residential homes as well as
light commercial and multi-unit properties throughout the Fox Valley and western Chicago suburbs.

Q: What windows do you install?
A: We install the full Lindsay Windows lineup — a family-owned Illinois manufacturer since 1947 —
including the Pinnacle, ClimateSmart, SunView, DiamondView, and CrownView series and the Revolution
tilt-and-turn. All are high-quality, energy-efficient vinyl windows. (Integrity Windows installs
windows only and does not currently offer doors.)

Q: How much do replacement windows cost?
A: Installed vinyl replacement windows in our market typically run from about $450 for value series
up to $1,800 for specialty tilt-and-turn units, depending on size, glass package, and frame
condition. Use the instant estimator for a ballpark, then book a free measure for an exact quote.

Q: Is the estimate the same as a quote?
A: No. The online estimator gives a planning ballpark only. Final pricing depends on exact sizes,
frame condition, glass options, and site access — confirmed during a free in-person measurement
before a firm written quote.

Q: Who actually installs the windows?
A: A seasoned installation team that has worked together for years and works with us exclusively.
Every project is planned and overseen with the discipline of military leadership.

Q: Are your windows energy efficient?
A: Yes. Lindsay builds high-quality, energy-efficient vinyl windows with Low-E glass and ENERGY
STAR–compliant options. Upgrading aging windows improves comfort, lowers operating costs, and
protects long-term property value.

## Articles

### 7 Signs It's Time to Replace Your Windows
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/signs-its-time-to-replace-your-windows
With the average U.S. home now more than 40 years old, a huge number of windows in the Fox Valley are well past their useful life. Windows rarely fail all at once; they decline quietly — a little more draft each winter, a slightly higher bill each month — until the cost of keeping them exceeds the cost of replacing them. Seven signs to watch for: First, you feel a draft with the windows closed, which means the seals or weatherstripping have failed and are driving up heating costs. Second, condensation forms between the panes, meaning the insulating gas seal has broken; you cannot clean it and the window has lost most of its insulating value — this is a definite replace. Third, your energy bills keep climbing faster than expected, with inefficient windows a prime suspect. Fourth, the windows are hard to open, close, or lock, which is a safety and fire-egress concern. Fifth, you hear too much of the outside world, since modern energy-efficient windows dampen sound. Sixth, you see water, rot, or soft frames, signaling moisture that can migrate into the wall structure. Seventh, the windows simply look tired, dragging down curb appeal and perceived value. Seeing two or three signs usually warrants an assessment; five or more almost always means replacement will pay for itself. A professional assessment separates the openings that need attention now from those that can wait.

### How Much Do Replacement Windows Cost in the Fox Valley?
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/replacement-window-cost-fox-valley
The honest answer to how much replacement windows cost is that it depends — but not on anything mysterious. In the Fox Valley and western suburbs, installed vinyl replacement windows generally run from about $450 per window for value series up to $1,800 per window for specialty units like a tilt-and-turn, with most standard double-hung replacements in the middle. "Installed" is the key word: a price covering only the window, with labor billed separately, can look cheaper until the full invoice arrives. The number is driven by series and glass package, size and style, installation type (insert versus full-frame), frame condition (hidden rot adds carpentry), and quantity (whole-home projects often carry a better per-window price). The cheapest quote is rarely the cheapest project, because windows are only as good as their installation; a premium window installed poorly will leak air and water and fail early. Compare quotes on the installed, itemized price for the same series and glass package — the only apples-to-apples comparison. Many homeowners phase larger projects, doing the worst openings first. Use the instant estimator for a ballpark, then book a free measure for a firm quote.

### Energy-Efficient Windows, Explained: U-Factor, Low-E, and SHGC
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/energy-efficient-windows-explained
Every certified window carries an NFRC label full of numbers, and three genuinely affect comfort and bills. U-Factor measures how much heat escapes through the window; lower is better, and for cold-winter Illinois a low U-Factor (well below 0.30) keeps heated air inside. Solar Heat Gain Coefficient (SHGC) measures how much solar heat passes through the glass; in our mixed climate a moderate SHGC is ideal, with south- and west-facing rooms benefiting from a lower value. Low-E (low-emissivity) coatings are microscopically thin metallic layers that reflect heat back to its source — keeping warmth in during winter and out during summer — while letting visible light through and blocking much of the UV that fades floors and furniture; Low-E is the single biggest reason a modern window outperforms an old one. The space between panes is usually filled with argon, an inert gas that insulates better than air, and a warm-edge spacer reduces edge condensation. For most Fox Valley homes the sweet spot is a double-pane unit with a Low-E coating, argon fill, a warm-edge spacer, and a low U-Factor. You do not have to memorize the acronyms — just work with someone who matches the glass package to your home's orientation and goals.

### Do New Windows Increase Home Value? The ROI of Replacement
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/do-new-windows-increase-home-value
Window replacement is one of the rare projects that both saves money and impresses future buyers. National cost-versus-value studies routinely put the resale recovery on replacement windows at 70% or more of project cost, before counting a single month of energy savings, placing windows ahead of many flashier renovations. Having spent more than a decade as licensed real estate brokers before founding Integrity Windows, the team has watched buyers notice old windows immediately and price replacement into their offers — usually higher than the job actually costs. Energy-efficient windows also reduce heating and cooling loss every month, with savings starting the day the install finishes. Returns that don't fit a spreadsheet include a quiet, draft-free, comfortable home; furniture and flooring protected from UV fading; lower maintenance; and a cleaner look from the curb. If budget means phasing, start with the most visible and most failed openings — the front of the house and any unit with condensation between the panes.

### Commercial Window Replacement: A Capital-Planning Guide
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/commercial-window-replacement-guide
For a commercial property owner, aging windows drive operating costs, affect tenant satisfaction, and represent a capital decision. Inefficient windows quietly raise HVAC costs and leave perimeter tenants uncomfortable, and deferred replacement compounds the problem. Few owners replace an entire building at once; a sound plan sequences work by worst-performing elevations first, by tenant impact (coordinating around leases, occupancy, and business hours), and by capital cycles (aligning spend with budget years and reserves). Tenant disruption is the top concern for property managers, so disciplined scheduling, clear daily communication, and tidy job sites are the difference between a renewal and a complaint — where the company's project-management background earns its keep. Modern energy-efficient units lower operating costs, improve comfort in leasable space, and signal that ownership invests in the building, making space easier to lease and command rent for. Window replacement is best understood as an income-protecting investment, not a cost. Led by a former U.S. Navy Commanding Officer, the team plans commercial work like a deployment — clear scope, sequenced execution, and accountability at every step.

### Why a Disciplined Installer Matters More Than the Window
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/why-the-installer-matters-more-than-the-window
Homeowners spend weeks comparing window brands and then hand the job to whoever quotes lowest — exactly backwards. The best window will fail if set out of square, sealed poorly, or rushed; the installation is the product. A bad install costs you air leaks around a window meant to stop drafts, water intrusion that rots the framing you paid to protect, premature seal failure and condensation, and voided warranties when the manufacturer's install spec is not followed — none of which show up on day one. Disciplined installation is methodical: the opening is measured precisely, prepped and inspected for hidden damage, the unit is set level and square, and every gap is insulated and sealed to spec. One consistent crew matters: the company's installation team has worked together for years and works exclusively with them, so the person setting your window has set thousands before it to the same standard. Mark Metzger spent a career as a U.S. Navy Commanding Officer, where execution under a standard was not optional, and that standard shows up at your house. To vet an installer, ask who actually performs the work, how they handle hidden rot, and what the warranty covers and who honors it.

### Vinyl vs. Wood, Aluminum, and Fiberglass: What Actually Lasts
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/vinyl-vs-other-window-materials
Window frames come in four common materials, each with a genuine case. Vinyl frames are energy-efficient, durable, and essentially maintenance-free — no painting, scraping, or rot — and resist moisture, which matters in a climate swinging from humid summers to freezing winters; for most Fox Valley homes it is the value-and-performance sweet spot. Wood is beautiful and historically appropriate for older homes but demands ongoing maintenance (painting or staining, sealing, vigilance against rot and insects) and tends to be most expensive. Aluminum is strong and slim-profiled, common in commercial applications, but conducts heat and cold readily, so without a good thermal break it underperforms in cold climates. Fiberglass is strong, stable, and thermally excellent — and usually priced at the premium end. There is no single best material, only the best fit for your home, climate, and budget; for the majority of replacements, premium vinyl delivers the most performance per dollar with the least upkeep. The company's job is to give a straight recommendation, not to sell a material.

### Insert vs. Full-Frame Window Replacement: Which Do You Need?
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/insert-vs-full-frame-replacement
There are two fundamentally different ways to replace a window. An insert (pocket) replacement fits a new window into the existing frame: the old sashes come out, the new unit goes into the sound existing frame, and trim stays largely intact — best when the frame is solid and rot-free and you mainly want better energy performance, with less labor, disruption, and cost. A full-frame replacement removes the entire window down to the rough opening so the new unit and surrounding structure can be inspected, repaired, flashed, and sealed — best when there is water damage or rot, the frame is failing, you are changing size or style, or you want the most thorough, longest-lasting result. To choose: a solid frame where you want efficiency favors an insert; soft frames, stains, or visible rot call for full-frame so the damage is actually addressed; changing size or style requires full-frame; and planning to stay long-term favors full-frame. Beware a quote that prices an insert when the frame is clearly rotting — covering damage instead of fixing it turns a window project into a structural repair later. During the free measure, the company inspects each frame and recommends the approach each opening needs.

### What ENERGY STAR Means for Your Windows (and Your Bills)
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/what-energy-star-means-for-windows
The blue ENERGY STAR label means something specific. It is a joint EPA and Department of Energy program that, for windows, sets independently verified performance thresholds — primarily on U-Factor and Solar Heat Gain Coefficient — that a product must meet to earn the label; it is third-party verified, not self-declared. It is climate-specific: a window efficient in Arizona is not necessarily efficient in Illinois. ENERGY STAR divides the country into climate zones, and Illinois sits in the Northern zone, where keeping heat in is the priority, so a qualifying window here has a low U-Factor tuned for cold winters. When comparing windows, make sure they are ENERGY STAR certified for the Northern climate zone specifically. Certified windows reduce heat that escapes in winter and enters in summer, lowering the load on the furnace and air conditioner; savings are real and ongoing though they depend on the home and usage. Beyond the bill, benefits include more even comfortable temperatures, less condensation, reduced UV fading, and a smaller energy footprint.

### How to Cut Drafts and Lower Heating Bills This Winter
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/cut-drafts-lower-heating-bills
An Illinois winter finds every weakness in a home's envelope, and drafty windows are usually part of the story when rooms never warm up or the furnace runs constantly. Find the leaks first: on a cold, breezy day move the back of your hand around each window's edges, or use a lit incense stick whose smoke pulls toward a leak. Low-cost stopgaps include replacing worn weatherstripping around operable sashes, caulking gaps where the frame meets the wall, applying temporary insulating window film to the worst offenders, and adding cellular shades for a small insulating buffer; these help but only slow the loss from a window that has fundamentally failed. The permanent fix, when panes are fogged, frames are failing, or drafts return every winter no matter how much you caulk, is the window itself: energy-efficient replacements with Low-E glass, argon fill, and tight modern seals stop the draft at its source. A rule of thumb: if you re-caulk the same windows every fall and still feel cold, the math has tipped toward replacement. The first winter after replacement, homeowners report finally comfortable rooms and a furnace that stops running nonstop.

### A Homeowner's Guide to Window Styles: Double-Hung, Casement & More
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/window-styles-guide
The window style matters as much as cost and efficiency: it shapes ventilation, cleaning, views, and how well the unit seals. Double-hung windows are the classic choice — both sashes operate and tilt in for easy cleaning from inside, making them ideal on upper floors and suitable for almost any home. Casement windows are hinged on the side and crank fully outward, giving excellent ventilation and, when closed, pressing tightly against the frame for one of the best air seals of any operable style. Slider windows glide horizontally, are simple and durable with no cranks or springs, and suit wide openings. Picture windows are fixed and do not open, offering the largest unobstructed view and the tightest seal, and pair well with operable units on either side; specialty shapes such as arched or geometric windows add architectural character. Bay and bow windows project outward, combining several windows into one feature that adds light, space, and often a seat or shelf. There is rarely one right style for a whole house — the best results mix styles by room: casements where you want airflow, picture windows where you want the view, and double-hungs elsewhere. To choose: prioritize casement or double-hung when ventilation matters most; double-hung with tilt-in sashes for cleaning upper floors from inside; a picture window for maximum view with no operation; and a slider for a wide opening with simple operation. During a free measure the company recommends the style that fits how each room is actually used.

### What to Expect on Window Installation Day
Published 2026-06-01 — https://integritywindowsanddoors.com/articles/what-to-expect-on-installation-day
Replacing windows is less disruptive than most homeowners fear, especially with a crew that does it the same careful way every time. Before the crew arrives, clear a path to each window and remove blinds, curtains, and valances; move furniture a few feet back; take down nearby wall hangings to protect them from vibration; and plan for pets and small children to be away from work areas. When the crew arrives, they protect floors and surrounding surfaces and review the plan — a clean, protected work area is the first sign of a disciplined crew. During installation, working opening by opening, they remove the old unit, inspect and prep the opening, set the new window level and square, and insulate and seal it to the manufacturer's specification, typically completing each window before moving on so the home is never left wide open. A standard window runs roughly 30 to 60 minutes once prep is done, while a whole-home project may span a day or more. Before leaving, the crew cleans the work areas, hauls away old windows and debris, and walks every opening with you to check operation, locks, and finish — nothing is done until you have seen it and agree.