Double-Hung
OKNA 500 Insul-Tec / 800 Enviro-Star
The American classic — both sashes glide and tilt inward, so you clean the outside glass from inside the room.
Window & Door Installation
Raise your skyline.
Premium windows and doors, installed by the crew that spent years setting them factory-direct from OKNA. Measured tight, installed clean, warrantied for life — and photographed proudly when we're done.
Or talk to Sergii directly: (717) 669-7251
Free estimatesFast · easy · no obligation
Fully insuredOne experienced crew, every job
Professional installationFactory-direct OKNA roots
Lifetime warrantyTransferable, glass breakage included
What we install
Windows. Doors. And the rest of the view.
Replacement is the specialty — but the same crew now handles everything between your rooms and the weather.
Replacement windows
Double-hung, casement, sliders, bay & bow, picture — custom-built to your openings and installed draft-free.
Explore window typesPatio & entry doors
Sliding patio doors that glide for decades and entry doors that seal like a vault — measured and hung by the same hands.
Explore doorsDecks & siding
Yes — we also do decks and siding. Bundle them with a window or door project, or ask us out just for the build.
Ask about itThe lineup
Every window style, drawn to open
No stock photography here — hover a card and the window works the way it does in your wall. Real glass is in our project gallery.
Casement
OKNA 700 Casement
Hinged at the side, opened with a crank — the tightest seal of any window that opens.
Sliding
OKNA 500 Insul-Tec / 800 Enviro-Star
Glides sideways on a track — nothing swings into the room or out of it. Perfect over sinks and in tight spots.
Bay & Bow
OKNA Bay & Bow Systems
Projection windows that push the wall outward — extra light, extra space, instant curb appeal.
Picture
OKNA 800 Enviro-Star
One huge fixed pane. No moving parts, maximum light, and the best efficiency numbers in the lineup.
The Skyline standard
We learned windows from the factory floor up.
Before Skyline had its own name on the van, our crew spent years installing OKNA windows direct from the manufacturer. We know what's inside these frames, why the glass seals the way it does, and exactly what a perfect install looks like — because we've done it, opening after opening, year after year.
That's the standard every job gets now: factory knowledge, one insured crew, and a finished wall we're proud to photograph.
Why homeowners choose SkylineFactory-Direct Know-How
We spent years installing OKNA windows direct from the manufacturer. We know these frames from the factory floor up — how they're built, and exactly how they should go in.
One Crew, Fully Insured
The same experienced crew shows up to every job, and every job is fully insured. You'll know who's in your home — and they've worked together for years.
Lifetime Transferable Warranty
OKNA covers frame, sash, glass seal, and hardware for life — including accidental glass breakage — and the warranty transfers to the next owner of your home.
Energy Bills, Noticeably Smaller
U-factors as low as 0.17 with triple-pane, dual-argon, warm-edge glass. The difference shows up in your heating and cooling bills every month, all year.
Quiet, Draft-Free Rooms
Multi-chamber frames, tight interlocks, and air-infiltration ratings as low as 0.01 keep drafts and street noise outside where they belong.
Clean Work, Documented
Floors covered, furniture protected, every scrap hauled away — and a photo report of your finished openings. Our gallery is those reports, unedited.
How it works
Four steps. Zero surprises.
- I
Free estimate
We come out, measure every opening, and give you a straight number. No pressure, no expiring "deals".
- II
Built to order
Your windows and doors are manufactured to your exact openings — not trimmed from big-box stock sizes.
- III
Installation day
One insured crew, floors covered, openings sealed and insulated — working until every opening is finished clean.
- IV
Walkthrough & warranty
We walk every window with you, hand over the photo report, and register your lifetime warranty.
Proof, not promises
Real jobs. Real photos. No staging.
Every photo below is from a real job by our crew — the same photo report our customers get when we finish.
“Recently I had my three-panel sliding doors replaced. The owner, Serhii, and his crew were able to remove the old doors and install the beautiful new patio doors within two hours. Last year his company also removed our old windows and installed new ones. Compared with other window and door installers, his prices are very reasonable and his work was very professional. I highly recommend his services.”
— Henry (Hank) · Three-panel sliding patio doors + full-home window replacement
Questions
Asked at almost every estimate
How much does window replacement cost?
It depends on the style, glass package, and number of openings — which is why every estimate is free and in-person. We measure, you get a straight number that holds, and you decide on your own time.
How long does installation take?
You get an exact timeline with your estimate — it depends on the number of openings. For scale: one of our recent three-panel patio door swaps was done within two hours, old doors out, new doors in.
What warranty do I get?
OKNA windows carry a lifetime transferable warranty covering frame, sash, glass seal, and hardware — including accidental glass breakage. It stays with the house if you sell.
Are you insured?
Fully. The same experienced crew works every job, and every job is covered. We are happy to show proof of insurance with your estimate.
Where do you work?
We're based in Fairless Hills, PA and install across Pennsylvania, New Jersey, Delaware, Maryland, New York.
Do you only do windows?
Windows are the heart of the business, but we also install sliding patio doors and entry doors — and we build decks and install siding. Ask about it during your estimate.
Free estimate
Ready for a clearer view?
Tell us about your project — number of windows, rooms, timeline. We'll come out, measure, and give you a number that holds. No pressure, ever.
- (717) 669-7251 call or text
- [email protected]