Secure Window Walls

Window Lintels & Caulking

Professional lintel repair and precise caulking that strengthen window openings, stop drafts, block leaks, and protect your home from costly structural damage.

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Reasons We’re Best

We deliver skilled brick and block work backed by years of hands-on experience. From repairs to full rebuilds, our team provides reliable service, honest guidance, and long-lasting results.

Highly Experienced

Decades of masonry experience ensure every repair and installation is done with precision, care, and durable techniques that stand strong through every season.

Affordable Price

Quality brick and block work doesn’t have to break your budget—we offer fair, competitive pricing with craftsmanship built to last.

Free Consultation

We offer a no-pressure, no-cost inspection to understand your needs and provide clear guidance on the best way to restore or improve your property.

Lifetime Warranty

Enjoy peace of mind with our lifetime warranty on workmanship, giving you long-term protection and confidence in every project we complete.

WHAT WE OFFER

Window Lintels & Caulking Services

Lintel Replacement
Safe, durable lintel replacements that restore full support above windows and doors.
Lintel Repair
Repairs cracking, rusting, or sagging lintels to prevent structural damage and leaks.
Exterior Caulking
Weather-resistant caulking that blocks drafts, moisture, and air leaks around windows.
Interior Window Sealing
Seals interior gaps to improve comfort, reduce energy loss, and stop indoor drafts.
Masonry Crack Repair
Fixes cracks around windows caused by lintel failure, shifting, or moisture issues.
Steel Lintel Treatment
Rust removal and treatment to extend the lifespan of steel lintels and prevent decay.
Window Frame Sealing
Clean sealant application to protect frames from movement, leaks, and air infiltration.
Waterproof Caulking
Moisture-proof sealants designed to withstand rain, humidity, and seasonal expansion.
Window Lintels & Caulking

Our Expertise

We specialize in repairing damaged lintels, restoring proper structural support, and applying high-quality caulking to seal gaps around windows. Our team addresses cracks, rust, drafts, and water intrusion with precision and durable materials. Whether your windows need stronger framing, improved insulation, or protection from moisture, NDCCNY provides long-lasting solutions that keep your home safe, secure, and energy-efficient.

Protect Your Windows Today

Strengthen your lintels and seal your windows the right way. Contact NDCCNY for a free inspection and get long-lasting protection for your home or building.

TESTIMONIAL

What they say about us

National Design & Contracting Corp place picture
5.0
Based on 10 reviews
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craig levy profile picture
craig levy
3 weeks ago
I needed my roof capped. Adel gave me a quote and exceeded my expectations. His crew took their time and followed the design of the building. I have other work and I will work with Adel. I have confidence in giving Adel the highest recommendation possible. He took a dangerous and hard job and made it look easy.
Bea Bonanno profile picture
Bea Bonanno
1 month ago
I totally recommend National Design and Contracting.
They do excellent work. The workers are great, friendly and hard working. The end product is eyr catching and they produce the best looking house or project, on the block.
You will love their work.
Frankie Brooklyn profile picture
Frankie Brooklyn
1 month ago
Hey fully recommend national design & contracting there work is clean and amazing definitely used them again and great pricing amazing again
June Deteskey profile picture
June Deteskey
1 month ago
We recently had our garden walls and front steps replaced. We used natural stone on the walls and blue stone for the capping/step material. The results are amazing! It looks beautiful. The workers are excellent-highly skilled, clean, and just nice people. We have received many compliments from friends and neighbors.
Isana Loshinsky profile picture
Isana Loshinsky
1 month ago
I recently had my driveway redone, which included both pavers and concrete, as well as a planter installation, and I couldn't be happier with the results! In fact, two of my neighbors had followed in my steps and used this contractor for their driveways as well. After interviewing several contractors, I found this one to be the most responsive and reasonable. He not only had a clear vision for my driveway but even presented it alongside an image, which helped me visualize the final outcome.

To my delight, the finished driveway turned out even better than I had anticipated! This contractor is brimming with innovative ideas for enhancing the area he works on, and it was evident that he treated my project and my home as if they were his own. He was always respectful, polite, and kept every promise he made. It was obvious to me that he valued a returning customer and for him keeping a good relationship with a customer even after the job was finished was just as important as gaining a new customer.

Throughout the process, he was consistently available to communicate and always listened to my input. The experience felt like a productive and positive dialogue between myself, the contractor, and his crew. I would not hesitate to work with him again for any future projects. Highly recommend!