400 SERIES CONVERSION KITS FOR NARROLINE® WINDOWS

400 SERIES CONVERSION KITS FOR NARROLINE® WINDOWS

400 SERIES CONVERSION KITS FOR NARROLINE® WINDOWS

Narroline® double-hung window conversion kits offer a smart solution for upgrading Andersen windows manufactured between 1968 and 2013.

These kits transform your existing units into modern tilt-wash double-hung windows with High-Performance Low-E4® glass — all without removing the frame or modifying interior trim.

As an Elite Certified Contractor for Andersen, the highest level of Andersen contractor certification, ARDMOR Windows & Doors is trusted to deliver expert installation that aligns with the manufacturer’s specifications. This certification confirms our deep knowledge of Andersen products and ensures that every conversion is completed with precision, reliability, and long-term performance.

KEY BENEFITS

Improved Energy Efficiency
Each conversion kit includes High-Performance Low-E4® glass, which offers up to 45% better energy efficiency in winter and 56% in summer compared to standard dual-pane glass.* This upgrade helps reduce heating and cooling costs year-round.

Convenient Tilt-Wash Design
The tilt-wash feature makes routine cleaning easy by allowing access to both sides of the glass from inside your home ‒ no ladders or exterior access required.

Customizable Style
Enhance your window’s appearance with optional upgrades such as decorative hardware, grille patterns, exterior trim, or specialty glass including art and patterned styles.

Hassle-Free Installation
Designed to fit your existing opening, each kit includes new upper and lower sash, balancers, jamb liners, and hardware ‒ no need to alter the window frame or interior trim. This means faster installation with minimal disruption to your home.

HOW TO KNOW IF YOU HAVE A NARROLINE WINDOW?

If your windows have these four features, they’re compatible with the 400 Series tilt-wash conversion kit.

DOUBLE-HUNG CONVERSION KIT OVERVIEW

*Values are based on comparison of Andersen® double-hung window conversion kit SHGC to the SHGC for clear dual pane glass non-metal frame default values from the  2006, 2009, 2012, 2015 and 2018 International Energy Conservation Code “Glazed Fenestration” Default Tables.

GOOGLE REVIEWS

ARDMOR Windows & Doors4.8
Based on 1821 reviews
Carrie Ann W.
1 day ago
Quick, professional.
Albert B.
3 days ago
Very fast and efficient scheduling for caulking our older Pella sashes!
Momadiya Ahmed X.
3 days ago
Mamadya Ahmed Bashir
Jeremy
3 days ago
Professional installation, prompt service, respectful techs
al O.
3 days ago
Dima and team did an excellent job...very thorough
Janine M.
4 days ago
I have been trying for over a year to find someone to repair my Anderson door but no one would do it. Ardmor was not just responsive, they communicated well regarding the estimate timing and the repair timing. And the door works perfectly! I would highly recommend Ardmor for your repair services!
Christina and Jarret T.
4 days ago
I found Ardmor on Google. My sunroom windows were decades old and needed to be replaced. The salesman, customer service, and installers were professional from start to finish, and the price was right! I recommend their services to anyone looking to upgrade their home with new windows!
D & K.
5 days ago
Ardmore’s team changed out our 48 year old patio door with a 400 series Anderson Sliding Patio Door. We couldn’t be more pleased. Excellent fit and finish. Smooth operation. Wish we had called them years ago.
Zachary S.
7 days ago
UPDATE — September 2026: Happy to update this on a positive note. The storm door is installed, looks great, and works exactly as it should, installation was quick and professional. What impressed me most was how Ardmor handled things after my original review. The president personally reached out, acknowledged the communication breakdowns, and explained a CRM issue that caused the original paperwork problem. They offered a $150 goodwill reimbursement without me asking. Communication since then has been night and day, proactive and responsive. My original review was fair for what happened at the time, but companies deserve credit when they own a mistake and fix it. Ardmor did. Bumping this up to 4 stars. Original review: Paid a $1,000 deposit at my July 25 estimate and heard nothing for two weeks. When I called, I learned my signatures never went through their system, no one had told me. I had to chase them repeatedly just to get the final measurement scheduled, and when I asked to speak with a manager, I felt talked down to rather than heard. The door was finally ordered August 7. I was told it'd be expedited, then given a September 6 arrival estimate that came and went with no update. Even after management promised a same-day callback about scheduling, it never came. It wasn't the delay itself that was frustrating, it was having to initiate every single step and chase basic updates on a simple storm door order. Bottom line: Rough start, but Ardmor stepped up when given the chance to make it right. Great door, great install, and a company that listened.
Steven M.
1 week ago
Fantastic service from this company will recommend
Valentin O.
1 week ago
True professionals!
Luke H.
1 week ago
ARDMOR had a great estimate, scheduling, and installation process. They use quality products, installers, and procedures. The installers were especially thorough and courteous!
Michelle G.
1 week ago
Timely, informative and expert workmanship
Robert M H.
1 week ago
Very professional and speedy repair/replacement.
Michelle G.
2 weeks ago
Kamila Z.
2 weeks ago
Fast appointment and job done well.
Cecilia M.
2 weeks ago
We’re very pleased with the work,polite and respectful employees and work done on time as scheduled,thank you Ardmor
Ellie C.
2 weeks ago
I called Ardmor Windows & Doors about a problem I was having with the locks on my Anderson sliding doors. Daniil arrived right on time, showed me what I was doing wrong, and solved the problem in a flash. I am very appreciative of their service and assistance.
Sabina H.
2 weeks ago
The company was easy to work with and everyone involved with the transaction was professional
Neal D.
2 weeks ago
Great installers Real pros
John K.
3 weeks ago
Workers came at the beginning of time window and installed the new glass in less than an hour. The workers also installed the new door handle for me as well!
Tamika T.
3 weeks ago
The service was great from the initial assessment to the end of the service
Ray B.
3 weeks ago
Andrii from Ardmor did a very professional job, he was on time and did the replacement under 30 minutes
Gerald S.
3 weeks ago
I live in Elkins Park PA. The work was done professionally and completely. My only complaint was that I needed to call them to set up a date for this job to be done. When set up, they came on time and completed the job. I am satisfied with their work. It was only to repair a sliding balcony door. It works fine now.
Kenneth S.
4 weeks ago
The installers were right on time and did a really nice job. Woluld not hesitate to use Ardmoor again

Free In-Home Consultation

We are passionate about resolving window issues for our customers. In order to study the problem in detail and advise the best strategy for a solution, we are happy to inspect the situation on-site at your home. The free in-home consultation allows customers to…

  • Fast and efficient consultation sessions.
  • Onsite inspection of your windows.
  • We do not require all decision-makers to be present.
  • Select your favorite style and color windows

Many consultation requests require customers to send digital images of the project.

OTHER BRANDS WE REPLACE

FACTORY CERTIFIED PRO’S

FULLY LICENSED & INSURED

WIDE ARRAY OF BRANDS & OPTIONS

ACCURATE QUOTE & PRICING

VIDEO TESTIMONIALS

ARDMOR ADVANTAGE

ARDMOR provides professional window repair, glass replacement, and door installation services across PA, NJ, NY, DE, and other states. As a licensed and insured contractor, we deliver factory-certified installation for Andersen, Marvin, Pella, Oknoplast and other leading brands. Here are the advantages of working with ARDMOR:

  • LICENSE & INSURED

  • FACTORY CERTIFIED PRO’S

  • ACCURATE QUOTE & PRICING

  • WIDE ARRAY OF BRANDS & OPTIONS