Case study · Franklin, TN · Aug 22, 2025
A modern farmhouse new build in Berry Farms (Franklin, 37064) — the architect specified 24-gauge Galvalume standing-seam metal on the entire main mass, with a CertainTeed Landmark Pro architectural asphalt on the wrapped front porch. We coordinated with the builder for a 5-day install that landed two days ahead of the substantial-completion target.
Squares
46 sq metal + 8 sq asphalt = 5,400 sq ft total
Pitch
9/12 main, 4/12 porch
Access
Scaffolding required for the rear two-story face
Tear-off
None — new build over fresh OSB
CertainTeed (Drexel Metals)
24-gauge is the heaviest gauge commonly used in residential — twice as resistant to denting as 26-ga. Galvalume is the aluminum-zinc coating that resists rust and rates 40+ year life. Charcoal Gray was the architect's spec to read 'dark farmhouse' on the south elevation.
CertainTeed
Color-matched to the metal — both Charcoal Gray, so the porch reads continuous with the main mass from grade. Landmark Pro is CertainTeed's mid-tier architectural with a 50-year limited warranty.
CertainTeed
Full coverage at all valleys, eaves, around penetrations, and at the metal-to-asphalt transition (which is a known leak point if under-shielded).
Drexel Metals
Mechanical snap-lock seams, no field crimping. Panels concealed-fastened (clips, no exposed screw heads). Hidden-fastener systems carry 40+ year leak warranties; exposed-fastener systems do not.
Drexel Metals
All clips and substrate fasteners hidden under the seam. Zero exposed fasteners means zero gasket-failure points — the #1 source of leaks on cheaper exposed-fastener metal roofs.
Builder coordination + scaffolding
Coordinated start date with the builder's substantial-completion target. Scaffolding set on the rear two-story face the day before install.
Underlayment + I&W shield, main mass
Full synthetic underlayment over the entire mass. I&W shield in valleys, at eaves, and around all penetrations including the chimney chase.
Standing-seam panel install
Custom-cut panels run-to-length from the truck. Concealed clips set every 18" up the slope. Snap-lock seams engaged by hand — no crimping tool, no exposed fasteners.
Asphalt porch + transitions
Wrapped front porch installed in Landmark Pro Charcoal Gray. Metal-to-asphalt transition flashing set with double I&W shield overlap (this is the leak point on most mixed-material roofs).
Final flashings + walk + builder handoff
Ridge cap, hip cap, chimney counter-flashing. Magnetic sweep, scaffolding removed. Builder substantial-completion walk; signed off, no punch-list items.
Drexel-supplied 24-ga Galvalume carries CertainTeed's longest panel warranty. Covers manufacturing defects, premature corrosion, and finish degradation.
Standard CertainTeed limited warranty on the Landmark Pro architectural shingle. Transferable once.
Anything we installed — metal panels, seams, flashings, transitions, asphalt porch, ridge cap — we cover for as long as the original owner owns the home.
Drexel's hidden-fastener system carries a 40-year no-leak warranty. Exposed-fastener metal does not qualify.
Outcome
Insurance + warranty + sign-off.
Substantial-completion two days ahead of builder schedule. No punch-list items at builder walk. 11-month follow-up: no callbacks, no leaks, no panel issues. Homeowner referred two neighbors who broke ground in 2026.
On new builds, the cost-premium for hidden-fastener 24-ga standing seam over exposed-fastener 26-ga is about 35% — but the warranty differential (40-year leak warranty vs. typically 20-year on exposed-fastener) and the lifetime differential (40+ years vs. typically 25) make it the right answer if you're going to own the home for 15+ years.
Homeowner voices
We don’t pay for reviews and we don’t buy leads. These are Middle TN homeowners whose roofs we’ve put hands on in the last 90 days. Full Google reviews linked from each.
Hail took out half my roof in the March storm. Ironclad had a tarp on it the same afternoon and walked the adjuster through every shingle. Full scope, zero out-of-pocket beyond my deductible. Roof was done in two days.
Holly N.
Got three estimates. The other two said 'full replacement, $22k.' Tyrone climbed up, took twenty photos, and said the soft spot was a single sheet of decking. $850 repair. Honest people are rare.
James W.
Used Ironclad for our last house in Brentwood and they were the first call when we bought the new one. Derek remembered my name eight years later. That's not customer service — that's how a family business runs.
Priya R.
Storm damage? Call us first.
We do roofs like this every week across Franklin and the surrounding Williamson County. Free 48-hour inspection — no obligation, no high-pressure sales.
(615) 555-0167
