When two sign shops hand you bids for the same storefront sign, the bid with more certification logos can look like the safer buy. It names brand-name parts, lists a few UL lines, prints a durability rating, and the leaner bid looks thin beside it. It is worth one more question before you trust the logo count: does the paperwork cover the finished sign, or only its parts?
What Those UL Lines on the Bid Actually Cover
Start with what the logos actually mean, because two signs can carry the same parts and still not carry the same assurance. For an electric sign, the kind that lights up, two separate UL standards are in play, and they cover different things. UL 48 is written for the completed electric sign, the assembled and wired unit you are paying for. UL 879 covers the electric-sign components that go inside it, the modules and wiring.
A bid can be full of UL 879 part references and still not show that the finished, wired sign meets the standard written for a completed sign. Suppose one proposal lists a recognized LED module and power supply and calls the sign UL listed. That phrase can describe the parts and still leave the assembled sign’s evidence unstated. A listed part is one input to a sound sign, and on its own it is not evidence that the finished unit meets its standard.
What to Ask Each Shop to Put in Writing
This is the part you can act on before you choose anyone. Ask each shop for documentation that covers the completed electric sign, not only a parts list. When a proposal points to a standard, check whether that line refers to the components or to the assembled sign, and ask which one the cited paperwork actually covers. With that check, you can tell a bid that documents the finished sign from one that stops at its parts. Completed-sign documentation names the assembled unit, not just the parts that go into it.
Then ask that both proposals spell out the same working details: the sign’s size, its materials and colors, the exact copy, and how it is lit. When each field is written down, omissions and scope gaps between the two bids become easy to see. One proposal may describe a smaller or simpler sign than the other, and that difference is easy to miss until you line the fields up. Put the proposals side by side, check every field, and resolve anything left blank or written in vague terms. Only after the finished-sign evidence and the fields line up are you comparing price on the same sign.
When a Bigger Number Does Not Mean a Better Sign
One more line on the bid deserves a second look, and that is salt-spray hours. A proposal might headline a large ASTM B117 chamber-hour count as proof that the sign will hold up outdoors. Those hours come from a salt-fog chamber, and not from seasons of real weather on a wall. On its own, that number does not predict how a coating performs in real West Michigan weather, and it cannot fairly rank two different metal or coating systems against each other. The test has its place, but a bigger chamber number is not a durability ranking. Ask instead for evidence tied to real outdoor exposure, and weigh the hours as one field among the others.
Judge Each Bid by the Finished Sign
If you are weighing two shops right now, send us the proposal you are leaning toward. We will read it and point to whether it documents the completed sign or only its parts. We are a sign shop in Walker, and we build for businesses across Grand Rapids and the rest of West Michigan. Reach Grand Rapids Sign Company at (616) 284-8739.
