Ask Me Anything: Spec Answers Six Questions Every Sign Shop Should Have Locked

Six real questions. Six straight answers. From the inspector who lives on our production floor.

They’re not basic. They’re foundational. Get them right and the rest of the job runs cleaner. Get them wrong and the back half of the project pays for the front. I’m Spec. I’m the inspector. I see every channel letter sign that leaves our floor — and most of the things that go wrong on a job started before fabrication. These six questions are the ones I see trip up quotes and orders most often. Today, I’m taking over the blog to walk through them.

Real questions. Real answers. Let’s go.

1. What’s the difference between CMYK and paint codes?

Different jobs. Different languages. Not interchangeable.

CMYK is for printers. It’s how ink gets mixed on paper or vinyl. Four channels — cyan, magenta, yellow, black — that combine to make every color you see in print or on a screen.

Paint codes are for physical surfaces. Sherwin-Williams (SWP), Benjamin Moore (BM), Pantone (PMS). They tell our paint shop exactly what to mix for an aluminum return, a backer panel, a wireway, a trim cap.

Here’s where it goes wrong: a designer sends us a logo and says “match the brand color.” But the brand color is in CMYK. We don’t paint with CMYK. We paint with SWP or BM or matched Pantone. And the conversion isn’t pixel-perfect. CMYK on a screen looks one way under your office lights. The same color, painted on aluminum, looks different on a building at 3pm versus 9am.

The best move: get the actual exterior paint code from the brand. Not the CMYK number. Not “kind of like this red.” The actual SWP, BM, or PMS number. If they don’t have one — that’s a conversation worth having before we cut anything.

If we’re matching from CMYK because that’s all we’ve got, tell us. We’ll do our best. But our best with a paint code is a different thing than our best with a guess.

2. What’s the difference between vector and raster art files?

Vector is math. Raster is pixels. For sign fabrication, we need vector. Period.

This one I have feelings about.

Vector files use mathematical paths to draw shapes. Lines, curves, fills — all defined by equations. You can scale a vector file to a billboard or a business card, and it stays crisp. Common formats: .ai, .eps, .svg.

Raster files are made of pixels. Dots in a grid. Common formats: .jpg, .png, .gif, .tif. They look fine at the size they were saved. Try to scale them up, and they get blurry — that pixelated mess you see when someone zooms too far on a phone photo.

For sign fabrication, we route, cut, and paint based on paths. Paths are vector. Pixels are not paths. We can’t cut a pixel.

Where it breaks down: a customer sends their logo as a 200×200 .png pulled from their website. It looks fine on screen. We open it in Illustrator and the edges are soft. Now we’re either tracing it (which costs time and risks drift from the original) or asking for a vector — which costs the customer a call to their designer.

The faster move: Ask for vector up front. Every time. If they don’t have one, that’s information we need before quoting, not after.

PDF caveat: a PDF can be either. If it was exported from Illustrator with vector preserved, we’re good. If it’s a scan or screenshot saved as PDF, it’s still raster underneath. We open it and check.

When in doubt: .ai or .eps. That’s the language we speak.

3. Why do you need overall dimensions, not just letter height?

Because letter height alone doesn’t tell us how big the sign is.

This is the most-asked, least-given piece of information.

When we ask for overall dimensions, we mean the bounding box. The full width and height of the entire sign — letter set, logo, backer if there is one. Edge to edge.

Letter height alone doesn’t get us there. A 24″ letter set could be five feet wide or fifteen feet wide depending on the word, the kerning, the layout. “PHO” and “PHILADELPHIA SIGNATURE STEAKHOUSE” are very different signs at the same letter height.

Why overall matters:

Permitting. You’re the one pulling the permit. The overall dimension on your build had better match the overall dimension on your permit, or your inspector is going to eat you for lunch. Square-footage limits, height restrictions, projection rules — every one of them keys off overall. Get the number right.

Wall fit. The sign has to physically live on a real wall. We’ve seen jobs where the sign was beautifully built and didn’t fit because nobody confirmed overall.

Best move: send a layout proof or a scaled drawing. If you don’t have one, send the artwork plus desired letter height, and we’ll work the math back to overall and confirm with you before we cut.

Don’t guess. Don’t round. Don’t assume. The wall doesn’t care what you assumed.

4. Does it matter if the sign is interior or exterior?

More than you’d think. The differences live in details most people don’t see.

The pros know to tell us up front. Here’s what they’re telling us — and why it changes the build.

Drain holes. Exterior signs need them. Non-negotiable. UL compliance requires it because water and electricity don’t mix, and exterior signs catch water. Interior signs don’t need them — and if they have them, all you’ve made are light leaks. Tell us where the sign is going so we drill the right holes, or none at all.

Eye level. Tell us if the sign will be at eye level. We’re the fabricator — we adjust the build for the end use. A lobby sign gets different finish tolerances than one viewed 20 feet in the air from across a parking lot.

Glossy or mirrored surfaces — pay attention here. If the sign is mounting on anything reflective and you’re spec’ing reverse-lit, the surface will expose every LED module behind the letter as a visible pin-dot instead of a clean halo. The pros tell us this up front. They know what looks like a beautiful reflective backdrop in renderings turns into a dotted disco ball on install day.

The bigger truth: Disappointment gets fixed in the details on the front end.

Tell us interior or exterior on every quote. Every time. The rest gets easier from there.

5. What’s the difference between In-Hand date and Install date?

Two different dates. Two different stakes. In-hand always comes before install.

Install date is when the lift shows up, the crew is on site, and the sign goes on the wall. That’s a customer-facing date. It’s on the project schedule. It’s what your customer is counting down to.

In-hand date is when the sign needs to physically arrive — at your shop, at the install site, at the receiving dock. That’s our deadline.

In-hand always comes before install. Always. Never the other way around.

How much before? That’s on you. Some shops want signs in-hand a week before install — for unboxing, inspection, prepping mounting hardware, staging the truck. Others run tighter — 48 hours, sometimes same-day for local installs. Both can work. The key is telling us which one you’re running.

Where this gets expensive:

A partner gives us an install date and assumes that’s also the in-hand date. It’s not. We build to in-hand. You build the rest of your project around what happens after the sign arrives.

Plan enough time to receive the sign, inspect it, prep your install hardware, and stage your crew. We’re not food caterers. Signs don’t spoil. Get them early. Prep right.

Build buffer between them. We’ll hit the in-hand date. The buffer is what protects you when something else goes sideways. Don’t plan for perfect conditions.

6. Why DSW?

You asked. I’ll be honest.

I’m biased. I was built here. So when I tell you what I see, take it for what it is: an inspector who lives on the floor.

Here’s what I see at DSW that I don’t see in most shops:

• Every department QCs. Not just at the end. Every department QCs their work against the Shop Drawing – the blueprint for the build. Correct material? Check. Correct color? Check. Correct depth and height? Check. Mounting, LED placement, paint finish, vinyl application. Check, check, check. By the time a sign reaches the truck, it’s been through dozens of pairs of eyes — and most of those eyes have been doing this for over a decade.
• Warranty rework runs under 1%. That’s not a marketing stat. That’s a real number from real production records. Cheap signs come back. Ours don’t.
• 10-12 business days, standard. That’s the build. Not a promise. Not a goal. A standard. And it holds because the front end is clean — we ask the questions before we cut. Spec Chec™ is how we do it.
• The whole team knows your name. The team huddles twice a day to discuss projects headed to the production floor, and your name is known around here. They’re thankful for your business and your trust in what we do. 
• We manufacture install-ready. When your crew opens the crate, the sign is built for the conditions you specified. Not “close enough.” Built for it.
• We say what we’ll do, and we do it. That’s the standard. That’s why I’m here. And that’s the answer.

No surprises. No flack.

Bonus question — What fuels you, Spec?

Here’s a Fun Fact about Me: NFL Running backs say feed me. Give them the ball. Let them eat. Same here. Feed me clean specs. Vector files. Locked dimensions. Real paint codes. That’s my meal. That’s what I run on. If you bring me an actual snack, I’ll inspect the packaging.

Want to keep going?

The TechSpecs are the cheat sheets — every dimension, material, mounting option, and standard build detail for our two most-quoted product lines.

Everything you’d ask your rep before quoting, on one page. Bookmark them. Print them. Share with your team.

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Got a question I didn’t answer? Send it to your rep — or to us when you submit a quote. I’m on the floor.