I Cost My Company $14,200 in One Quarter. Here's the Checklist That Would've Prevented Most of It

The Tuesday Morning We Found Water Where Water Shouldn't Be

July 13, 2021, 7:40 a.m. My site superintendent called from Building 3 and I was still 40 minutes away, second cup of coffee in hand, doing that thing where you already know the news is bad because the voicemail was too short.

"Get down to the northwest corner of the basement. Bring a flashlight."

Building 3 was a 1982 masonry warehouse we'd started renovating that spring. Scope was three parts: re-cover the roof with new TPO and Johns Manville roof insulation, refit the wet basement walls with Johns Manville GoBoard waterproof backer, and replace failed glass in 14 windows. Total job was around $410,000 in materials and labor.

I was the guy signing every purchase order. I'd been in procurement for that contractor about three years at that point — long enough to feel confident, not long enough to actually be good at it.

The GoBoard Installation Looked Fine From Six Feet Away

Honestly, the GoBoard side of the job felt like the easy part. Light, easy to cut, went up fast over the old block wall. We staged a few pallets in early June and the install crew knocked it out in about a week and a half.

From the floor, the work looked clean. Seams lined up, edges were tight, panels were flat.

The problem was invisible. We used a generic construction sealant out of the site stock for the seams and around the window returns, because the JM-approved sealant that was supposed to go with the GoBoard order didn't make it onto the first PO. The installer figured "sealant is sealant" and I never checked.

According to the Johns Manville GoBoard installation guide (the version I pulled from their site in January 2025 — always verify current instructions), seams and penetrations need their specified compatible sealant and a clean, dry substrate. We got maybe half of that right. The northwest wall was holding overnight condensation, the generic sealant never bonded, and water tracked straight through the seam joints.

If you're searching for johns manville goboard installation right now because you're about to do this: the sealant is structural, not cosmetic. A single call to the manufacturer's tech line would've saved me $6,800 in rework and about three weeks of schedule. I'm not knocking the product — I still spec GoBoard on wet-area walls. I'm knocking the fact that none of us read the spec sheet before the pallet hit the dirt.

Then Came the Window Glass Replacement Invoice Nobody Warned Me About

August. The basement was fixed and drying out, and we moved on to the window glass replacement portion. Twelve failing units in Building 3 and two more in Building 2, all on the original 1982 frames.

I quoted it out on a per-lite basis and went with the low bid — about 14% under the next closest quote. Looked like an easy win on paper.

Two things blew up. First, I ordered the glass based on frame dimensions without confirming the glass spec in writing. Turns out the south elevation of Building 3 was supposed to get Low-E double-pane with a warm-edge spacer, and the north side of Building 2 was on a different spec entirely. Half the units came in configured wrong. That was about $3,100 in replacement glass plus a delivery delay.

Second — and this is the one that still stings — the winning quote didn't include removal or disposal of the old units. When the invoice arrived, that "included" had quietly become a $1,800 add-on. The bid that had looked 14% higher when I compared numbers actually came in lower, because the other vendor had priced the full scope.

That's the moment I stopped comparing bottom lines and started comparing scopes.

The Glass Water Bottle Order That Arrived in Pieces

September. HR wanted 200 glass water bottles for an employee appreciation push — the kind with the silicone sleeve and the bamboo lid. I found a supplier, checked the per-unit price, placed the order.

The bottles shipped loose in partitioned cartons with no foam dividers. When the pallet landed, 61 were chipped or shattered. The supplier refunded the broken units, but the event was four days out and there was no time to reorder. We ended up handing out what survived and buying coffee shop gift cards with the refund, which cost another $400 out of the original budget and looked a lot less polished.

Lessons I should've already known: on anything fragile, the packaging spec goes in the PO. Not the catalog, not the email thread — the PO.

The Can-Am Defender Doors Problem

Late October. Our site manager backed the crew's 2020 Can-Am Defender HD10 into a fence post and crumpled the driver's door. Not a huge deal, until I went looking for a replacement.

I found aftermarket can am defender doors online for roughly 40% less than OEM and ordered one, assuming a door is a door. It is not a door. The aftermarket shell bolted onto the OEM hinge points with about half an inch of slop, the latch striker didn't line up, and our mechanic spent nearly a day trying to make it work before we gave up.

We returned it, ate the shipping both ways, and paid full OEM price anyway — about $1,340 all-in once the labor was counted. The cheap option cost us more than the expensive option. I wrote that sentence on a sticky note and stuck it to my monitor for the rest of the year.

What I Actually Learned From the Whole Mess

By December I added up everything: the GoBoard rework, the wrong window glass, the surprise removal fees, the shattered bottles, the Defender door fiasco. Roughly $14,200 in rework, replacement, and wasted labor across one quarter. Not catastrophic for a company our size, but embarrassing, and entirely avoidable.

Here's the checklist I built after that year, and the one I still use:

• Waterproofing products: the manufacturer's specified sealant, tape, and fasteners ship on the same PO as the panel material. If they're not in the box, the installation doesn't start.
• Glass and windows: glass spec written out and countersigned — type, coating, spacer, and whether removal and disposal are included. "Per lite" means nothing without the scope.
• Fragile goods: packaging requirements written into the purchase order. No verbal assurances.
• Replacement parts: verify fitment against the exact model year and trim before ordering, and call the equipment manufacturer's parts desk if the fitment chart is vague.

One more thing, and it's the part I care about most. I've started asking vendors "what's NOT included" before I ask "what's the price." It feels slow. It feels like I'm being annoying. But the quote that lists every line item — even when the total looks higher — is the one that usually costs less at the end.

I don't have hard data on how often this plays out across the industry. My experience is based on roughly 180 POs across commercial renovation jobs in the $200K–$600K range, mostly in the mid-Atlantic. If you're doing residential or light commercial work, your mileage will almost certainly differ.

But if you're early in a procurement role and you just found water where water shouldn't be: read the spec sheet. Every time. That's the job.