Celtic Building Supplies

Celtic Building Supplies Celtic has over 25 years of frontline experience delivering quality building materials to NY, NJ, CT.

There’s a reason contractors across the tri-state have been building with us for over 25 years. Swipe through to see wha...
06/01/2026

There’s a reason contractors across the tri-state have been building with us for over 25 years. Swipe through to see what makes Celtic different 👷

05/29/2026

I promise we’re working!!

For 25 years, we’ve shown up. Same day, twice a day, through last-minute change orders, tight deadlines, and jobs that c...
05/27/2026

For 25 years, we’ve shown up. Same day, twice a day, through last-minute change orders, tight deadlines, and jobs that couldn’t wait. We’ve delivered to job sites, and we’ve never taken that responsibility lightly 💚

But honestly, none of it means much without the people behind it. Our team lives in the same communities we serve.

05/26/2026

Not all lumber is built for the same job 🪵Pressure-treated wood is chemically treated to resist moisture, rot, and insects. Regular lumber is for interior framing. Know the difference before you build.

05/20/2026

Most people don’t find out they ordered the wrong insulation until they’re already on the job site. Wrong R-value, wrong thickness, wrong application, it’s a costly mistake. Here’s what to know before you order. 👇

Working at height? Don’t leave it to chance. The Werner 10ft Max Patrol Self-Retracting Lifeline is built for leading-ed...
05/18/2026

Working at height? Don’t leave it to chance. The Werner 10ft Max Patrol Self-Retracting Lifeline is built for leading-edge use on steel, concrete, and b-deck, compact, lightweight, and compliant. Available at Celtic Building Supplies.

05/15/2026

This is one of the most common questions we get, and getting it wrong means either running short mid-pour or overspending on material you don’t need. Here’s how to calculate it the right way before your next project.

Address

Manhattan, NY

Opening Hours

Monday 7am - 5pm
Tuesday 7am - 5pm
Wednesday 7am - 5pm
Thursday 7am - 5pm
Friday 7am - 5pm
Saturday 8am - 12pm

Telephone

+1 877-723-5842

Website

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