Trusted Long Island Construction and Remodeling Experts​

Email Address:

Office@Cernilli.com

Hours

Mon - Fri: 7:30-4:30
Sat: 9:00–3:00

Energy Efficiency Starts With Better Windows

Improve your home’s comfort, energy efficiency, and appearance with professionally installed windows and doors. Whether you’re upgrading outdated features or enhancing your home’s style, our team delivers quality installation with long-lasting results.

We offer a wide range of window and door styles to match your home’s design while improving insulation, energy efficiency, and overall performance. Properly installed windows and doors can help reduce energy costs, enhance comfort, and boost curb appeal. From exterior upgrades to custom interior solutions—including sliding barn doors, French doors, pocket doors, and hardwood interior doors—we provide options that add both function and style to your space.

Window & Door Installation Services

Looking to improve more than just your windows and doors? We also provide kitchen and bathroom remodeling, custom decks, flooring, and full exterior services—helping your home look its best inside and out. Contact us today to schedule a free consultation.

Experience You Can Trust

With over 30 years of experience, Cernilli Construction has built a reputation for delivering reliable, high-quality results. From single-room renovations to full home rebuilds, we approach every project with the same level of care and attention to detail.

Financing

Enjoy a beautiful, well-designed bathroom that fits both your style and your budget. Whether you’re looking to update the look, improve functionality, or create a more relaxing space, our team will guide you through every step of the process. From initial ideas to final finishes, we work closely with you to bring your vision to life with quality craftsmanship and attention to detail.

Commonly Asked Questions

How do I know when it’s time to replace my windows or doors?

Common signs include drafts, higher energy bills, difficulty opening or closing, condensation between glass panes, or visible wear and damage.

What types of windows and doors do you install?

replacement windows, exterior entry doors, and interior options like French, sliding, and pocket doors.

Will new windows and doors really improve energy efficiency?

Yes, properly installed energy-efficient windows and doors can help reduce drafts, maintain indoor temperature, and lower heating and cooling costs over time.