Celtic Building Supplies

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

Not all plywood is created equal - and using the wrong grade on a commercial job can mean failed inspections, unhappy cl...
09/07/2026

Not all plywood is created equal - and using the wrong grade on a commercial job can mean failed inspections, unhappy clients, or costly rework.

Think you know pressure-treated wood? Some of these myths are still showing up in specs - and they could cost you at ins...
09/04/2026

Think you know pressure-treated wood? Some of these myths are still showing up in specs - and they could cost you at inspection or down the line 🚧

Questions on grade, retention rating, or fasteners for your next project? Our trade desk has answers.

08/31/2026

Normal conversation between Celtic staff 🤪

08/30/2026

Got questions about painting wood?
Here’s everything you need to know to get that smooth, flawless finish!

Accuracy where it counts.When precision matters on the job site, the Milwaukee 100ft Long Tape Measure gets it right eve...
08/20/2026

Accuracy where it counts.
When precision matters on the job site, the Milwaukee 100ft Long Tape Measure gets it right every time. Built tough for daily site demands.

08/17/2026

Before you start your next project... watch this. From what you’ll need to get started, to delivery times and our returns policy, we’re answering the questions we get asked the most.

08/16/2026

“Why Celtic Supplies is Built Different” At Celtic, our workers don’t just deliver the job... they test the materials.

Chaos on site is rarely sudden - it’s cumulative.Without a clear laydown plan, materials end up wherever there’s a gap. ...
08/12/2026

Chaos on site is rarely sudden - it’s cumulative.

Without a clear laydown plan, materials end up wherever there’s a gap. It’s not carelessness…it’s just the absence of a system.

At Celtic, we work with contractors to sequence deliveries around your site’s actual layout and capacity.

Talk to our team about your next delivery schedule.

08/11/2026

One less thing to figure out.
Send us your decking and railing measurements, and we’ll calculate the materials you need and let you know the lead time. So you can get started with confidence.

Why do contractors keep coming back? Ask them. Five stars across the board.We just show up and get the job done. ...
08/10/2026

Why do contractors keep coming back? Ask them. Five stars across the board.
We just show up and get the job done.

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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