Metal roofing in Durham

Why northern Durham County went metal first

Metal roofing Durham NC farmhouses have carried since the 1950s was 5V crimp galvanized steel, screwed to purlins over a barn or a two-story frame house, and a lot of it is still up there. It rusts at the cut edges, it's loud, and the screws back out every 15 years, but it has outlasted three generations of shingles on the houses next door.

Modern metal roofing Durham homeowners choose now is a different product: Galvalume steel (aluminum-zinc coated) with a Kynar 500 / PVDF paint finish, formed into either standing-seam panels with concealed clips or exposed-fastener panels with gasketed screws. A properly installed standing-seam roof lasts 40–60 years in the Piedmont. It sheds pine needles instead of holding them, algae doesn't get a grip on it, and a pine limb that would punch through a shingle roof usually dents it.

Where we install it: farmhouses and new builds from Bahama to Rougemont and out toward Hillsborough, the modern-farmhouse builds going up on acreage north of I-85 and in southern Durham County, restored mill houses downtown where the owner wants the historic look on a porch, and anyone in Hope Valley or Treyburn who has decided they never want to buy another roof.

Spec matters more than brand

• Galvalume, not plain galvanized. The aluminum in the coating is what keeps cut edges from rusting in our humidity. Plain galvanized panels start rusting at the eave cut inside ten years.
• Kynar over polyester paint every time. The cheaper SMP and polyester finishes chalk and fade in Carolina sun; Kynar holds its color for decades.
• 26 gauge minimum on a house. The 29-gauge panels sold for sheds oil-can and dent from hail and limbs.
• Long-life fasteners with EPDM washers on exposed-fastener systems, stainless or zinc-aluminum, not the plain zinc screws that rust-streak the roof in three years.
• High-temperature synthetic underlayment. Standard underlayment softens under a metal roof at 130 degrees; Durham's attics get there every July.

Standing seam versus exposed fastener

Standing seam — panels with raised, interlocking seams and concealed clips that let the metal expand and contract. No screws through the panel face, so no gaskets to dry out. The right choice for a house you're living in. $1,000–$1,800 per square installed, so $25,000–$50,000 on a typical Durham two-story.

Exposed fastener (ag panel, 5V, PBR) — panels screwed through the face with gasketed screws. Cheaper, fine on a barn, shed, porch or workshop, and honestly what most of northern Durham County has on the house too. On a home, the two thousand gaskets each become a maintenance item around year 15–20. $700–$1,200 per square installed.

Both are roughly two to three times the cost of an architectural shingle replacement. The math works if you're staying 15 years or more, if the house is under pines and you're tired of limb damage, or if you're building new and want to never think about it again.

What the job involves

A full tear-off (we don't install metal over shingles on a house; the old roof traps humidity against the deck), decking repairs, high-temperature underlayment, then panels roll-formed on site or shop-cut to your exact rafter lengths. Trim, ridge, valleys and flashing are matched metal. A 2,000 sq ft house takes three to five days.

Trade-offs, honestly

Metal is louder in heavy rain unless the attic is insulated well. It shows dents from large hail, which we get every few years. The color you choose is the color for 40 years. An exposed-fastener roof, however cheap, will need screws replaced eventually. And on a 1990s subdivision house with an HOA, you'll need approval first; some Durham and Cary covenants still restrict metal.

Considering it? Our post on metal roofing in Durham: cost, pros and cons goes deeper. A roof inspection will tell you whether the decking and framing are ready for it, and the pricing page puts metal and shingle numbers side by side.