Stop the Drafts and Lower Your Power Bills With New Windows
Low-E glass keeps the heat outside, and vinyl frames don't warp in Irmo's humidity the way wood does, so the difference holds up all summer.
4.8★ from 169 Google Reviews · 20+ Years in the Midlands · SC Licensed #120891
Or call (803) 728-6850
Window Replacement Built for Irmo's Heat and Humidity
There’s a good chance that the windows you have now stick when you lift them, fog between the panes, and let July heat pour straight through the glass.
New windows change how the house feels every day: rooms that hold their temperature, sashes that open with one hand, and a look from the curb that finally matches the rest of the work you've put into the place.
Same-day callback:
reach out during business hours and a project manager calls you back the same day during business hours. After hours, you hear from us by about 9 am the next morning.
A written quote:
we give you a rough number at the consultation, then follow with written package pricing, usually within two days, sometimes the same day. No obligation.
Straight answers on timing:
a standard white window runs about two to three weeks from order to install, and we tell you before you sign how your glass and finish choices change that.
Your Window Options
We install
Simonton, Atrium, WinCore, Interstate, and ProVia's Endure line, and we bring physical samples into your home so you're choosing from the real thing, not a picture on a screen.
Vinyl with Low-E glass
Irmo heat and humidity warp wood window frames over time. Vinyl doesn't warp, and the Low-E coating on the glass reflects heat back outside instead of letting it into your rooms, which is what takes the load off your AC and your power bill.
Impact-rated glass
Available as a premium option. Impact-rated windows look like any other window; what sets them apart is what's inside: impact-rated glass and aluminum reinforcement in the sash. You don't see the reinforcement, but together those additions roughly double the cost of the window. The most common ratings are DP50 and DP80 (DP = design pressure). Your project manager goes over the available options and prices it alongside the standard option so you can compare.
Wrapping
If your existing windows have wood brick mold, we wrap it so the exterior trim is sealed and finished, and if siding is part of your plans, the wrap goes in first so the siding butts cleanly up to it.
Composite wood
If you want the look of wood without the warping, we install Interstate's composite wood line.
Color and laminate finishes, including black
Black windows against white siding is the look homeowners across the Midlands are asking for right now, and we install laminate finishes in black and several other colors. If you're weighing a painted finish against laminate, the difference matters; the short version is that laminate resists scratching and paint doesn't, and the full answer is in the FAQ below.
What Happens After You Reach Out
First Contact.
Call or send the form. During business hours, a project manager calls you back the same day during business hours. After hours, you hear from us by about 9 am the next morning.
The In-Home Consultation.
Your project manager comes to your home with window samples and a lookbook of past work, looks at what you have, measures, and goes over your options. If you land on a window we don't have on the truck that day, we set a second visit with the right samples. We also have a showroom in Irmo, which you are welcome to visit to see the full lineup in person.
Your Written Quote.
Your project manager gives you a rough number at the consultation, so you know what you're working with. The quoted package price usually follows within two days, sometimes the same day, depending on how many options you're pricing. If you want financing, check out our financing page for details and an application. When you're ready, you accept electronically.
Ordering and Scheduling.
Lead time depends on what you choose. A standard white window runs about two to three weeks. Tempered glass adds about a week. A color finish adds about three weeks per colored surface, so color outside adds three weeks, and color inside and out adds three more. We handle the permits ourselves, so that's not a trip you have to make to the county. If your neighborhood has an HOA, you start that approval, and we hand over whatever they ask for: samples, our license, and our insurance, so the request isn't held up waiting on paperwork from you.
Installation Day.
A hand-selected crew, trained by the manufacturer, installs your windows, with your project manager walking them through the job and checking the work. A crew installs roughly eight standard windows a day, so most homes take a day or two. Where there's wood brick mold, the wrap goes on as part of the install.
The Final Walk-Around.
Your project manager inspects the finished job against the manufacturer's specs, confirms the cleanup, and makes sure anything we moved goes back where it was. Our project manager walks the finished job and encourages you to come along, so you can see it's right. We email your warranty registration and transfer information once the job wraps.
Why Get Your Windows From Rennison
An installer does your estimate
The person who measures your windows is a window installer, not a salesperson. They look at what you have, give you real numbers, and write up a quote, and the visit ends there unless you want it to go further.
A designated project manager on every job
Your project manager briefs the crew before the job starts, checks in while it runs, and personally inspects the finished work against the manufacturer's specs before it's considered finished, so problems get caught on our side, not yours. The team is cross-trained too, so if something needs eyes or materials while your project manager is across town, another team member steps in rather than your job waiting.
Crews trained by the people who build the windows
We hand-select our crews, and Cornerstone, the manufacturer behind Simonton and Atrium, trained them at its Virginia facility, with manufacturer reps also training on-site here in the Midlands. That matters because a window's manufacturer warranty assumes a correct installation, so training on the actual product is what keeps that warranty paperwork worth something if you ever need to use it.
A five-year workmanship warranty on every full replacement
We put it in writing, and the full terms are beside the form below.
We install windows across Columbia, Irmo, and the surrounding Midlands.
What Your Written Quote Covers
We don't publish a "starting at" price for windows, because the honest answer is that a window's price depends on its size, its glass package, and its finish, and a teaser number would tell you nothing about your specific situation. Instead, we give you a written quote, measured to your home, with the work laid out so you know exactly what's being done; that way you can compare it directly against any other quote you’ve collected. Your project manager gives you a rough number before leaving the consultation, tells you honest lead times before you sign, and can set you up with financing; the details are on our financing page if you’re interested.
Get Your Free Window Assessment and Written Quote
An on-site assessment of your current windows, and a written quote with the work laid out.
No obligation. No high-pressure follow-ups.
The Rennison 5-Year Workmanship Warranty
If anything about your window installation fails due to how we installed it within five years of completion, a project manager will come out to inspect it. If the cause is our workmanship, we’ll bring the crew and the materials back and make it right at no cost to you. You call the same number you used to book the job.
Every window we install also carries its manufacturer's product warranty covering the window itself. Those are two separate promises, and we treat them that way: the manufacturer covers the product, we cover the install, and we'll get your registration and transfer information to you after completion.
Get My Free Window Quote
A project manager calls you back the same day during business hours.
Or Call (803) 728-6850
Questions Homeowners Ask About Window Replacement
How much does window replacement cost in Irmo, SC?
It depends on the number of windows, their sizes, the glass package, and the finish you choose; a black laminate window and a standard white vinyl window are priced very differently. Rather than post a range that wouldn't survive your first conversation, we give you a rough number at your in-home consultation and a written quote, usually within two days, that prices every window and option line by line. Financing is available. See our financing page for details.
How long will it take to get my new windows?
A standard white window runs about two to three weeks from order to installation. Tempered glass adds about a week, and a color finish adds about three weeks per colored surface, so black outside adds three weeks and black inside and out adds three more. Once the windows arrive, a crew installs roughly eight standard windows a day, so most homes take a day or two. Your project manager gives you the timeline for your exact order before you sign.
Should I choose a painted or a laminate color finish?
Laminate. Paint on a window scratches more easily, and a scratch on a black window shows. Laminate is bonded to the window and is very hard to scratch, which is why it costs more and why we recommend it for black and other dark finishes. We install laminate windows in black, as well as several other colors, and your project manager brings sample options so you can see the difference in your own light.
Do you install impact-rated or storm-rated windows?
Yes. Impact-rated windows look like standard windows, but two things inside set them apart: the impact-rated glass and aluminum reinforcement in the sash. It's a costly premium option, but can save you money in the long run. Your project manager prices it next to the standard package, and you decide whether it's worth it for your home.
Should I replace my windows before new siding, or at the same time?
Before, or in the same project. If your windows are the nail-flange type, they go in cleanest when the siding is off the house. And if we're wrapping your window trim, the wrap needs to go on before the siding so the siding butts up to it. If you're planning both, tell your project manager at the consultation, and they'll build you one package quote covering the whole exterior.
What warranty comes with my new windows?
There are several, and they cover different things. The window itself carries its manufacturer's product warranty, and we email you the registration and transfer information after the job wraps. The installation carries our own five-year workmanship warranty on every full window replacement: if something fails because of how we installed it within five years, we come back and make it right at no cost to you. Many of the windows we install also come with a manufacturer's accidental breakage warranty on the glass; your project manager can tell you which of your chosen windows include it.
Do you handle permits and HOA approval?
We pull the permits, so that part isn’t your problem. HOA approval works differently: the HOA answers to you, not to your contractor, so you start that request, and we hand over everything they ask for, whether that's color samples, our SC license, or our insurance. Our license, #120891, is verifiable on South Carolina LLR.
What window brands do you install?
Simonton and Atrium, both built by Cornerstone; WinCore, whose laminate line we install for black and other color finishes; Interstate for composite wood; and ProVia's Endure line. You won't pick a brand from a website. Your project manager brings samples to your consultation and matches the window to what you want it to do.