Commercial Metal Roof Recover in Grand Junction, CO

Aerial view of the completed white TPO membrane recover roof on the High Grade Concrete & Excavation building along Highway 50 in Grand Junction, Colorado

Project Capsule: The 2025 Western Slope hail storm dented the exposed-fastener metal roof on High Grade Concrete & Excavation's large building on Highway 50 in Grand Junction. Rather than tear off more than 12,000 square feet of metal, CRC documented the storm claim and recovered the roof, building a new insulated, code-compliant low-slope system directly over the existing metal and finishing it with a 60-mil white TPO membrane, with no exposed fasteners left for the next hail to find.

Project Facts

Location	Highway 50 corridor, Grand Junction, Colorado
CRC office	CRC Grand Junction Office
Building type	A large two-story metal building for a concrete and excavation contractor, with a ground-floor tenant
Cause of loss	2025 Western Slope hail storm
Existing roof	26-gauge exposed-fastener ribbed (R-panel) galvanized metal, roughly 8-1/2 inch rib spacing
Scope	Over 12,000 square feet (roughly 127 squares) recovered; hail-damaged ribbed metal wall panels also replaced
Roof system installed	A metal-roof recover: rigid polyiso insulation and a Georgia-Pacific DensDeck Prime cover board over the existing metal, finished with a 60-mil white TPO membrane induction-welded to its fastening plates
Insulation	Rigid polyiso built up to R-30 above the deck, the continuous-insulation level the energy code sets for a replaced roof in Climate Zone 5B

Why recover a hail-damaged metal roof instead of tearing it off?

Stripping more than 12,000 square feet of 26-gauge metal off a two-story building would have exposed the interior to the weather, so CRC built the new roof over the existing panels and the concrete and excavation operation stayed dry and in use. Once hail has dented exposed-fastener panels and worked hundreds of gasketed screws, chasing individual leaks is a losing battle.

Commercial metal roof repair options

How is an induction-welded TPO recover different from a fully adhered one?

Here the 60-mil white TPO membrane was induction-welded to the fastening plates that hold down the insulation and cover board, so no fasteners pass through the finished membrane. On CRC's other Grand Junction metal recover, the membrane was instead fully adhered across the whole surface.

See the fully adhered Grand Junction TPO recover

The Challenge

The 2025 Western Slope hail storm hammered High Grade Concrete & Excavation's metal building on Highway 50 in Grand Junction. The roof was a large 26-gauge exposed-fastener metal roof, and the hail bruised and dented the panels across the entire field. On a building this size, that is not a cosmetic problem. Compromised metal panels and the exposed fasteners that hold them down are exactly where a roof starts to leak, and a leak over an active concrete and excavation operation puts equipment, materials, and the whole building envelope at risk.

Close-up of a weathered galvanized metal roof panel with hail bruises circled in blue chalk on a commercial building in Grand Junction, Colorado — Hail impacts across the galvanized panels, circled in blue chalk as CRC documented the storm damage.

Aged exposed-fastener ribbed galvanized metal roof panels showing hail wear on a commercial building in Grand Junction, Colorado — The aged exposed-fastener metal roof, weathered and hail-worn across the field.

A tape measure laid across ribbed galvanized metal roof panels showing roughly 8-1/2 inch rib spacing, with an exposed fastener marked, on a Grand Junction commercial roof — Measuring the roughly 8-1/2 inch rib spacing on the existing 26-gauge exposed-fastener panels.

CRC documented the loss as a full insurance claim, measuring the existing panels, circling and photographing the hail impacts across the metal field, and recording the collateral hail damage to the building's AC condenser, a window, and exterior metal. Exposed-fastener metal like this ties its watertightness to hundreds of rubber-gasketed screws; once hail has dented the panels and worked the fasteners, chasing individual leaks across a roof this large is a losing battle. The question was not whether to fix a few panels, but how to give the building a roof that would shrug off the next storm.

The Solution

For the roof itself, CRC chose the smarter long-term fix for a large hail-damaged metal building: a recover, not a tear-off. Instead of stripping more than 12,000 square feet of metal panels off a two-story building, the crew built a new, fully insulated, code-compliant low-slope system directly over the existing metal. Rigid polyiso insulation was laid over the ribs to create a flat, insulated plane, built up to R-30. A recover is exempt from the energy code's insulation requirement, but R-30 is the continuous-insulation level the 2021 IECC, enforced by the Mesa County Building Department, sets for a replaced roof in this climate zone, so the recover was built to it. A Georgia-Pacific DensDeck Prime cover board went down over the insulation to give a hard, impact-resistant substrate, and a 60-mil white TPO membrane was installed over the cover board, induction-welded to its fastening plates, so no fasteners pass through the finished membrane.

Rigid polyiso insulation and DensDeck cover board being installed over an existing ribbed metal roof during a recover in Grand Junction, Colorado, with the Grand Mesa in the background — Rigid polyiso and DensDeck cover board going down over the existing metal ribs, with staged material on the roof.

Crew installing Georgia-Pacific DensDeck Prime Roof Board with EONIC Technology over insulation on a commercial metal-roof recover in Grand Junction, Colorado — The Georgia-Pacific DensDeck Prime cover board fastened over the insulation, next to a still-exposed metal section.

White 60-mil TPO membrane dried in on a low-slope commercial roof with round induction-weld fastening plates visible along the edge in Grand Junction, Colorado — The 60-mil white TPO membrane dried in over the cover board, induction-welded to the round fastening plates.

Because the recover was built over the existing metal, the building stayed dry and in use while the work went on overhead, and there was no full tear-off exposing the interior to the weather. CRC also replaced the building's hail-damaged ribbed metal wall panels as part of the same claim, so the finished exterior matched the new roof. The result is a continuous, reflective, fully sealed white membrane roof, with the insulation, cover board, and welded membrane doing the work the bare metal panels no longer could.

The Result

High Grade went from a dented, leak-prone metal roof to a continuous white membrane roof engineered for the Grand Valley's hail and sun. The white surface reflects heat and lowers the cooling load on the building below; the membrane and cover board shrug off the next hail event far better than bare metal panels; and because CRC handled the claim from documentation through the finished roof, the owner had one accountable contractor the whole way. It is a large, in-town Grand Junction project that shows how CRC tackles a difficult metal building, not with the obvious tear-off, but with a recover system that leaves the owner better protected than before the storm.

Aerial view of a finished white TPO membrane roof showing the pattern of induction-welded fastening plates on a commercial building along Highway 50 in Grand Junction, Colorado — The finished white TPO membrane, with the pattern of induction-welded fastening plates visible across the field.

Top-down aerial view of the completed white membrane recover roof covering the full footprint of a commercial metal building in Grand Junction, Colorado — A top-down view of the completed recover across the building's full footprint.

Why CRC for a Commercial Hail Claim

A hail-damaged commercial roof is often worth far more than a first estimate suggests, and the best repair is not always a like-for-like replacement. CRC documents what the storm actually did, presents the complete claim, and then builds the roof that will hold up, in this case a recover that outperforms the metal it replaced. Our Grand Junction office serves the Western Slope, and our commercial team installs white TPO membrane systems and handles storm and hail insurance claims across Colorado.

Get a Storm-Damage Roof Assessment

If a hail storm has hit your commercial building, do not settle on a surface-level estimate before the roof has actually been inspected. Call our Grand Junction office at (970) 877-7663 or our Denver office at (720) 893-7663, or click to request a free roof inspection.