By Todd, owner of Windows Plus
Buying replacement windows isn’t something most people do more than once or twice in their life, so it’s normal to feel like you’re guessing. This is the guide I’d hand a friend in Louisville before they start calling window companies: what actually matters, what doesn’t, and the questions that separate a good job from a bad one.
First: do you actually need new windows?
Not every old window needs replacing. These are the signs I look for:
- Drafts you can feel near a closed, locked window
- Fog or condensation between the panes (the seal has failed)
- Soft or rotted wood at the sill or bottom of the sash
- Windows that stick, won’t stay up or won’t lock
- Single-pane glass or windows that are 20 to 25 years old or more
If you’ve got two or three of those, replacement is usually the better investment. There’s more detail in signs it’s time to replace your windows.
The window types Louisville homeowners choose from
- Double-hung: Both sashes slide up and down and usually tilt in for cleaning. The most common window in Louisville homes.
- Casement: Hinged on the side, opens with a crank. Great airflow and a tight seal.
- Sliding: Slides side to side. Good for wide, short openings.
- Awning: Hinged at the top. Common in bathrooms and basements.
- Picture: Fixed glass that doesn’t open. Maximum light and view.
- Bay and bow: Project out from the wall and add space and light to a room.
You can see all of them on our window types page. For a deeper comparison of crank-out windows, read types of casement windows.
Frame materials, in plain English
- Vinyl: The most popular choice for replacement windows. It doesn’t need painting, it doesn’t rot, and it insulates well. It’s the best value for most homes.
- Fiberglass: Very strong and stable, and it can be painted. It usually costs more.
- Wood: Beautiful and traditional, but it needs regular painting or staining and upkeep. Common in historic homes.
- Composite: Blends materials for strength and low maintenance.
For most Louisville homes, a well-built vinyl window installed right is where I’d start. We’ll show you samples at the estimate so you can see and feel the difference.
Energy ratings, decoded
Every window should have a label from the National Fenestration Rating Council (NFRC). The two numbers that matter most here:
- U-factor: How well the window keeps heat in. Lower is better. This matters a lot in our winters.
- Solar Heat Gain Coefficient (SHGC): How much of the sun’s heat comes through. Lower keeps rooms cooler in our humid summers.
Kentucky has real winters and hot, sticky summers, so you want a window that balances both. Look for ENERGY STAR certification for our region. Low-E coatings and gas-filled glass are standard on good replacement windows. Triple-pane is an upgrade, and I cover whether it’s worth it in triple-pane windows in Louisville.
Insert vs. full-frame replacement
This is the most important question to ask any company, and most people don’t know to ask it.
- Insert (pocket) replacement: The new window slides inside your old frame. Faster and cheaper, but you lose glass area and you keep the old frame, including any rot or gaps hiding behind it.
- Full-frame replacement: The old window comes out down to the rough opening. The installer can see and fix rot, insulate the gaps and seal a brand-new frame.
We only do full-frame replacement. It’s more work, and it’s the only way I’m comfortable standing behind the install for the life of the window.
What replacement windows cost
We don’t post per-window prices, because the style, size, glass, number of windows and condition of your openings all change the number. I break down every factor in what window replacement costs in Louisville. The short version: get written quotes and compare what’s included, not just the total.
Who installs them matters most
A great window installed badly is a bad window. Before you sign anything, ask:
- Who’s doing the install? Your company’s own employees, or subcontractors? Our crews are our own.
- Insert or full-frame? See above.
- What does the warranty cover? Glass, frame, hardware and labor? Does it transfer if you sell? Ours is a lifetime warranty that transfers to the next owner.
- What happens if they find rot? You want that in the quote or explained up front, not a surprise on install day.
- What do reviews say? Read the recent ones, not just the star rating. We’re at 4.8 on Google from more than 600 reviews.
How to compare quotes side by side
When you’ve got two or three quotes on the kitchen table, line them up on these points before you look at the total:
- Same windows? Same styles, sizes and glass package in each quote. A cheaper quote sometimes quietly drops Low-E glass or grids.
- Same installation? Full-frame or insert. This is the biggest hidden difference.
- Trim and wrap included? Interior trim, exterior trim or capping, caulking and cleanup should all be spelled out.
- Rot and surprises? How will they handle rotted sills or framing if they find them?
- Warranty in writing? What’s covered (glass, frame, hardware, labor), for how long, and does it transfer?
- Who shows up? The company’s own installers or a subcontractor you’ve never met?
If one quote is much lower, the difference is almost always in one of those lines.
Watch out for high-pressure pricing
You’ve probably heard about the “today-only” price that drops by half if you sign before the salesperson leaves. I’d be cautious with any company that won’t let you think it over. A fair price is a fair price tomorrow, too. We give you a written quote and you take the time you need.
What to expect from start to finish
- The estimate. We measure every opening, look for rot and water damage, show you samples and talk through styles and colors. You get a written price.
- Ordering. Replacement windows are made to your exact measurements, so there’s a lead time before install day. We’ll give you a realistic timeline.
- Install day. Our crew protects your floors and furniture, removes the old windows down to the rough opening, fixes any rot, then sets, insulates and seals each new window. We work one opening at a time.
- Trim and cleanup. We finish the trim inside and out and haul away the old windows and debris.
- Walkthrough. We show you how everything operates, locks and tilts for cleaning, and make sure you’re happy before we leave.
What the warranty should actually cover
“Lifetime warranty” can mean very different things. Ask whether it covers:
- The frame and sash against defects
- The insulated glass seal (fogging between the panes)
- Hardware like locks, balances and cranks
- Labor to fix any of the above, not just the parts
- Transfer to the next owner if you sell the house
Our windows come with a lifetime warranty that transfers to the next owner, and we’ll walk you through exactly what it covers before you sign.
Replacement windows FAQ
What’s the best replacement window for Louisville’s climate?
A well-insulated window with Low-E glass and good U-factor and SHGC numbers for our region, installed full-frame. The style depends on the room.
How long does window replacement take?
Most homes take one to two days, depending on the number of windows.
Can I replace windows a few at a time?
Yes. Many homeowners start with the worst ones. Doing more at once is usually more economical per window.
Do new windows really lower energy bills?
They typically do, especially if you’re replacing single-pane or badly leaking windows. How much depends on your house and how you heat and cool it. You’ll notice the comfort difference right away.
Is winter a bad time to replace windows?
No. Windows can go in year-round. A good crew opens one window at a time so the house never sits open to the cold.
Should I replace windows before I sell?
If the windows are obviously failing, with fogged glass, rot or broken hardware, buyers and inspectors will notice. New windows are one of the things listings highlight. If the windows are in decent shape, it’s often not necessary.
Do I need a permit?
Replacing windows in existing openings usually doesn’t need the same permits as new construction, but rules vary. Homes in a local historic district need approval first. See our guide to historic window replacement in Louisville.
Can I change the style of a window when I replace it?
Usually, yes. With full-frame replacement we can put a different style in the same opening, like swapping a hard-to-reach double-hung over the sink for a casement.
Start with a free in-home estimate
We’ll measure every opening, show you the options and give you a written price. There’s no charge and no pressure, and we respond to requests within 24 hours. Learn more about our window replacement, check our current offers, or schedule your estimate.
