Window & Door Contractors Serving Lancaster, PA Area

No matter the quality of the window or door, the key to energy efficiency is in the installation. If they are not installed properly you are losing any possibility of recouping your investment. We stand behind our work and our guarantee is just another way to give you the peace of mind you deserve.

– Kurt Klausmair

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We’re having our window sale right now!

Buy 1 Window, Get the second 40% Off

Enjoy $0 Down, 0 Interest, and 0 Payments for 18 Months

Don’t miss this chance to save money every month on energy bills by installing more energy efficient windows.

Call Today for Your Free Thermal Energy Analysis.

 Hurry, offer ends February 28th, 2021.

About Our Window & Door Installation Services

If you’re thinking about installing new windows or doors, there’s no reason to wait because the benefits start immediately. From increased energy efficiency to enhancing your home’s interior and exterior curb appeal, new windows and doors installed by Klausmair Construction transform a home from ordinary to outstanding.

We are currently set up to professionally install and repair the following windows & doors: vinyl, wood, fiberglass, and steel.

We also provide thermal imaging and leak investigation to make sure we do everything we can to make your home as energy efficient as possible.


Types of Windows We Install

Double Hung Windows

Casement Windows

Picture Windows

Awning Windows

Hopper Windows

Bow & Bay Windows

Garden Windows

Single Hung Windows

Types of Doors We Install

Front & Entry Doors

Storm Doors

Patio & Sliding Doors

Interior Doors

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Why Work With Us

When Klausmair Construction opened in 1994, our focus was mainly on providing high-quality roofing services. Count on us for unparalleled exterior services, from roofing and siding installation to gutter and spouting repair and installation. We are also the leading installer of decorative exterior architectural millwork, from window and door casings to flower beds and more.

Award-Winning Service

Consistently a winner of Lancaster County’s award for BEST EXTERIOR REMODELER! Year after year we have delivered the best experience for our customers and clients. It’s become a point of pride for us, and something we strive to prove to each client at each project. Contact Klausmair Construction and let us prove to you why we’ve been name BEST EXTERIOR REMODELER so many times.

Professional Crews

Our hardworking and highly trained crew of primarily Amish workers mean you can expect an honest, reliable and motivated crew to meet and exceed your expectations every time. It also means you can rest assured that your home or commercial building will be cared for with exceptional attention to detail and quality results that will last.

Established & Trusted Company

We’ve been a locally owned and operated business since 1994. We know what to look for, and we know what’s important to our customers. We’re also a fully licensed and insured company to help protect our clients against financial loss, as you’d expect any professional should. PA License# 051359.

Our Reputation of On Time & On Budget

We’ve worked hard to create our reputation of being on time and on budget. We work to find the most efficient and effective way to accomplish every project. By focusing on managing and executing every project as planned to avoid hidden costs or delays we make sure what you’re promised is what you get.

What Our Customers Are Saying

Our house was damaged during a storm when a tree fell on our roof. We called Klausmair for a quote and they came immediately and walked us through the process and set our minds at ease. The work began on time and finished on time. Very happy with the results and would recommend them to anyone.

Chris Barker

I had my roof done by Klausmair, from the very beginning with the sales Manager Kevin, everything went smoothly, and Kevin was always there if I had a question, while I waited for my roof. A few weeks later my roof was on. When they were done they left my place all clean. I was very happy with this company and their expertise, I would recommend Klausmair Construction!

Davida Mathey

Window & Door Tips & Articles

A Business Owners Guide to Commercial Roofing Systems

A Business Owners Guide to Commercial Roofing Systems

How to Find the Best Options for Your Commercial Roofing Project Although simple and utilitarian, the main goal of a roof system is to maintain the watertight integrity of a building and keep its contents dry. Today’s variety of flat or low slope commercial roofing...

Preparing for the Wave of Projects in 2021

Preparing for the Wave of Projects in 2021

As people are becoming more hopeful of the summer and fall months getting back to normal, and the pandemic coming under control, contractors all through the industry are preparing for the massive wave of projects. Ever since last March people have put the majority of...

What You Need To Know Before Buying Replacement Windows

What You Need To Know Before Buying Replacement Windows

There are a lot of different types of windows out there. And if you're looking to replace some windows this year it can be daunting trying to choose between different styles, different brands, different elements and more. So we've scoured through several great...

5 Must-Know Tips on How to Prepare Your Roof for Winter

Winter is just around the corner and properly preparing your roof for these cold and snowy months is essential if you want to protect both the roof and your home from potential dangers and damages.  Taking some necessary precautions on time will let you enjoy the...

Schedule Your Free Estimate

Are you unsure what your project is going to take? If your worried about getting an estimate and having your project run over time and over budget, give Klausmair Construction a call. Our reputation of consistently being on time and on budget means we won’t just give you some hollow low-budget estimate. What you’re promised is what you get.

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