Celtic Building Supplies

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

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.

Head protection has come a long way. The Milwaukee BOLT™ Safety Helmet features an IMPACT ARMOR™ liner that reduces rota...
05/13/2026

Head protection has come a long way. The Milwaukee BOLT™ Safety Helmet features an IMPACT ARMOR™ liner that reduces rotational impact forces. The kind that cause serious head injuries on the job. ANSI Type 2 certified, adjustable fit, and built to work with accessories. Available at Celtic Building Supplies. 🪖

05/11/2026

Big box doesn’t know your job site. We do. There’s a real difference between grabbing supplies off a shelf and working with a team that understands your project, your timeline, and what you actually need. Here’s why local wins.

This National Safety Week, we’re sharing 7 jobsite safety tips every contractor and crew member should know. Swipe throu...
05/08/2026

This National Safety Week, we’re sharing 7 jobsite safety tips every contractor and crew member should know. Swipe through and share this with your team 🦺

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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