Professional Window Installation and Replacement

Meet the Windowologist!

“At Windows Perfections we want to empower You to make an informed and intelligent decision based on FACTS, not on the marketing hype or fluff. We stay true to providing you the absolute best windows in the industry!”

Mark Stouffer
“The Windowologist”

Call Today:

1-800-237-4091

We won’t hound you.

We know many of our competitors are relentlessly calling and emailing for your business. Our sales philosophy is simple: if you want quality windows, you’ll reach out and ask us for our expertise.

Where superior service meets highest standards.

We don’t mean to brag, but only 5% of window contractors are chosen for The Angi Super Service Award and you win it 8 years in a row…well, you must be doing something right!

View Angi Profile

What our windows can do for you:

Save you money in energy cost
Increase your home’s comfort level
Reduce the harmful ultraviolet light
Reduce interior fading
Increase your home’s curb apparel
Increase your home’s value
Decrease outside noise
Reduce/Eliminate Drafts
Reduce/Eliminate painting
Increase Security
Make cleaning a breeze

Call to schedule your free quote!

1-800-237-4091

Year-Round Window Installation

We install all different window styles manufactured by Okna Windows in Bristol Pennsylvania. Okna Windows is listed on Energy Stars Most Efficient for 2025. All our windows are custom-made and designed to match your home style and décor perfectly. All this while increasing your homes comfort level AND reducing energy costs.

We serve Blair County, Bedford County, Centre County, Huntingdon County, and surrounding counties from Elk County down to Clarion County. Click the button below to get a quote!

Request A Quote

Jon A

19:22 29 Jan 25

I had an outstanding experience every step of the way with Window Perfections!! I HIGHLY recommend you speak with Mark. He is a straight shooter and everything he told me unfolded afterward exactly as he originally said. His installation team was incredibly professional and treated my home with the utmost respect.

I am writing this review six months after replacing all of the original windows on the first floor of my 1960s ranch home. The energy savings were felt even before they finished the two-day job. The project occurred during an early-August heat wave, and the cooling that my home experienced was noticeable that same day. These Okna brand windows blocked out the heat of the sun from ratcheting up the temperature in every room of my home. For the remainder of August and September, I turned on my AC a lot less often than I expected because the inside of the house was very comfortable.

More importantly, the wintertime energy savings were even more apparent. My heating bill from Dec. 2024 was slightly lower than the one from Dec. 2023 -- despite it being an average of 7 degrees colder in 2024 and a rate increase from my natural gas supplier. Mind-blowing!!

Other major benefits I've noticed over the last six months is a significant reduction in road noise (I live near a heavily trafficked road in State College) and other outside sounds. Plus, I think they just plain look nicer and are far easier to maneuver than other vinyl windows I've seen in other homes. Ignore the reputation vinyl has, these are premium windows!

Once again, I can't recommend Window Perfections enough. Do yourself a favor and give them a call if you are looking to upgrade your home.

Response from the owner 11:15 21 Feb 25

Jon, What amazing feedback you provided. I'm so appreciative that you took the time to write your experience with my company. It was a true pleasure serving you and we are here for you if you ever need anything. My dream is coming true. When I started Window Perfections nearly 25 years ago, my core value was and still is to provide a superior customer experience with top notch windows & doors. It is such a rewarding feeling when I read reviews from our customers, and they make comments thru their experience with Window Perfections that are in alignment with our vision and mission. I can't take credit for all of our success. I have to give credit where credit is due and that goes to our amazing staff. We are truly blessed to have people that actually care about each and every homeowner we serve as if they are their own family. Thanks again Jon for taking time out of your very busy day to drop your thoughts and positive experience with Window Perfections!!

Lisa Wise

16:42 27 Nov 24

Jacob, came to our home to explain and give estimate is the best, he by far knows what he is talking about. For such a young man just starting out he is knowledgeable and believes in this product. He could not have been any nicer to us, and very friendly. I am glad that we chose Window Perfections, and I would tell anyone that is looking for windows to give them a call.

Our Job is done, and I can't say enough about the windows and the job that their employees have done. Their employees are so well mannered and polite. The windows are very nice. Thank you for making our house look great.

Response from the owner 13:09 24 Sep 24

Lisa, thank you so much for taking the time to let a review of your experience with Window Perfections. We are very proud of Jacob and happy to hear he provided you with such a positive experience. We are very much looking forward to serving you. Thanks again for choosing Window Perfections!!😃

Cherie Neely

18:58 04 Oct 24

We just had windows installed throughout our one level home. The experience was great right from the beginning from talking to a salesperson, to Mark who provided an estimate, to Brian and his crew, Kenny, Jim and Dom who completed the installation. Everyone was pleasant and knowledgeable and made the process less painful than it could've been. Brian and crew were very respectful and carried out the promise of leaving both windows and areas around them clean. I highly recommend this company and their high-quality windows.

Brian Bonsell

14:35 03 Aug 24

I recently had Window Perfections install 20+ new windows in my home, and I couldn't be happier with the results. The entire process was smooth and exceeded my expectations.

The installation crew Brian, Kenny, Jim, and Dom were amazing. They went above and beyond, even fixing 2 loose shingles as well. They arrived on time if not earlier, worked efficiently, and kept everything clean inside and out. They left no mess behind.

The customer service was also very responsive and helpful throughout the project. Any questions I had were promptly answered, and they kept me informed every step of the way.

The new windows look great and have made my home more energy-efficient. I've already noticed a difference in temperature regulation.
The quality of the windows is top-notch, and the craftsmanship is evident in every detail. I appreciate the follow-up from the company to ensure everything was done to my satisfaction.

I highly recommend Window Perfections for their excellent service and quality work. Thank you, Windows Perfection, for a job well done!

Dana Kent

14:49 21 Jul 24

We are very pleased with their work. The craftsmanship and professionalism is second to none. When they left for the day, they cleaned up so well that you wouldn’t have known they were here.
As for the windows themselves, it was well worth the investment. Right away, we could tell the difference in temperature and sound.
We’ve only had the windows for a few weeks and have referred them numerous times.

Response from the owner 00:43 22 Jul 24

Thanks Chad for letting us such a stellar review. We work really hard to ensure total customer satisfaction so if you ever need anything we're just a call or text message away.

Amber Serre

22:39 28 Jun 24

Window Perfections recently replaced double windows in our kitchen with a beautiful sliding glass door. The process was simple from start to finish. Mark helped us pick out the door, and then two of his crew members came the next day to measure the space. Bonnie was very helpful with scheduling and working around competing projects. The day of the door installation was seamless. The crew removed the windows and replaced the door the same day. They were extremely kind, efficient, and left our house cleaner than they found it. A job well done!

Nancy Stell

21:20 24 Jun 24

We had 20 windows replaced. Mark was very professional and knowledgeable at the estimate appointment. Excellent job on the installation. Workers were very courteous. Had to have a few modifications made and they would discuss the issue before proceeding. Would definitely recommend this company to family and friends.

Patricia Edevane

17:29 18 Jun 24

I had a beautiful large picture window installed last May and they did an excellent job. I called yesterday with a crank handle not working well and they were here the next day and fixed it. Excellent service.

Donald Miller

13:12 31 May 24

We want to thank Mark and his employees for their insight and the quality work and products they sell. We recommend that anyone looking for windows give Mark a call. The men doing the work are very through and professional!

Response from the owner 13:47 31 May 24

Thanks "Moe" for the kind words. We really appreciate your business and it was a real pleasure working for you guys!!

Carrie Washington

14:00 23 May 24

Kiel Knisely

11:42 29 Nov 23

Need to replace a bunch of windows. Mark came out and explained everything. Walked us through the process and wasnt the pushy salesman you usually deal with. Crew was great and professional. Followed up afterwards to ensure everything was going well

Jeffrey Loeffler

22:39 03 Nov 23

Got a quote last week. Sales representative was excellent. Great product knowledge. Products offered seemed very good. Prices seemed fair. Before you buy, it’s worth the time to hear and see what they have to offer. I didn’t purchase the windows quoted because turn around time was outside of my timeframe for the job quoted, but I’m most likely going to purchase windows from them on my next build in 2024. The sliding doors are very impressive. Check them out.

Joe Talerico Jr.

20:18 21 Jul 23

Window Perfections is the BEST window company to work with from start to finish! Highly recommend them!!

They have a great product and have an absolutely great team to work with! It started with Caleb, he was very professional, courteous and knowledgeable. We then worked with Bonnie, who did a great job on getting us scheduled in a timely fashion. Lastly the installers, Brian and Kenny, did an awesome job. They wouldn't even come in our home with their shoes on until they had placed drop cloths down everywhere. The installation only took a few hours, but afterward, you wouldn't have even known they were here. They cleaned up so well that there wasn't dust or debris found anywhere (inside or outside)!

I'm telling you, Mark has a wonderful staff working for him and a great product. We are DEFINITELY looking forward to working with them in the future to replace the rest of our windows!

Jennifer Dempsey

12:40 06 Apr 23

My husband and I decided to use this company based on the quality of the windows and after speaking to Mark, we were confident that this company would do a great job with installing all new windows and two sliding doors. We were very satisfied with the work that Brian, Buck, Josh, and Kenny did. They were always on time and cleaned up every day. They were very professional, trustworthy, and did an awesome job. We are very satisfied with this company and the work that was done.

Ernest Auman

03:10 26 Dec 22

Awesome from start to finish.

Steve Kozel

15:39 07 Jun 22

I would HIGHLY recommend Window Perfections to anyone considering window replacement or new windows for their home. The quality of the windows they handle (OKNA) is very very good, the amount of options on type, color, and configuration is great, and I cannot say enough about how clean, neat, polite, and professional the installation crew is. Not to mention, Mark is a very honest guy and extremely customer focused.
We obtained three other quotes before choosing Window Perfections, and it was just as clear as their windows that we made the right choice. They by far had the best value to offer. So if you're looking for a high quality product that is provided by a first rate business, I strongly recommend you select Window Perfections!
Steve K

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