of Northwest Florida(850) 896-2207

Panama City, Florida · 2025

Metal Roof Retrofit & Drainage Improvements

A local flooring business and showroom · Panama City, Florida

This approximately 50-year-old metal roof had received patches over the years, but the project also required attention to the way water moved off the building. Existing gutters sat behind the mansard parapet, with drainage routed through the mansard soffits and downspouts. Longstanding drainage problems had contributed to corrosion in the roof panels near this area.

Inside, the showroom stayed fully operational and dry for the length of the recover, with minimal disturbance to the business.

Completed entirely by Garrett Construction's own crew.

A Garrett Construction crew member hot-air welding a seam in the white membrane, with safety tape along the roof edge.
Installation in progress — hot-air welding the membrane.

An aging metal roof. A new approach to drainage.

Garrett Construction first confirmed that the existing roof was suitable for a recover, including satisfactory screw pull tests. That allowed us to retain the serviceable roof while replacing rusted R-panel sections where needed.

The existing metal roof at the start of the work, with rolls of material staged along the ridge.
The existing metal roof at the beginning of work, with materials staged.

Preparing the roof

Our crew installed flute fill between the metal ribs and foam cover board over it, giving the Duro-Last® membrane a continuous surface.

Cutaway diagram of a metal roof retrofit assembly, with insulation and cover board over the metal panel ribs and a membrane rolled across the top.
Illustrative metal roof retrofit assembly. Manufacturer-supplied diagram; project assemblies vary.
Flute fill set between the ribs of the metal roof with cover board laid over it.
Flute fill and cover board over the existing metal roof.
Two Garrett Construction crew members laying roof preparation materials across the metal roof.
The crew installing roof preparation materials.
Crew members working along the roof perimeter beside the safety line, with cover board in place.
Working along the roof perimeter.

Crickets and membrane

We built crickets—raised, sloped sections that direct water toward drainage points—before the membrane went over them.

A cricket built up on the roof deck, its sloped plywood surface meeting the cover board before the membrane covers it.
Cricket construction before membrane coverage.
Wide view across the roof with the white membrane laid out, materials on the surface, and safety line along the perimeter.
Membrane installation in progress, with materials and perimeter work still underway.

Gutters and downspouts

We installed gutters and downspouts, including replacement of the downspout serving the mansard area. The work brought the roof assembly, perimeter details, and drainage improvements together as one coordinated project.

The replacement downspout running down the wall below the mansard soffit.
Replacement downspout at the mansard soffit.
Gutter and downspout installed along the building wall, with the roof edge above.
Gutter and downspout installation.
Location
Panama City, Florida
Year
2025
Our role
Metal roof retrofit, Duro-Last recover, and drainage improvements