Sheet M-201 · Material chapter A
Fiber cement: the board Atlanta defaults to, and what it demands in return
Fiber cement — cement, sand, water, and cellulose fibre — is the most common full replacement siding in metro Atlanta. James Hardie dominates the local market, and its HZ10 line is formulated for hot, humid, high-UV climates: Atlanta sits squarely in HZ10 territory.
Why it wins here
It does not rot, termites do not eat it, and woodpeckers largely ignore it. It is noncombustible (ASTM E136), holds a paint film far longer than wood, and comes as lap plank, shingle, and vertical panel for board-and-batten work — one material family can satisfy most HOA and historic-district pattern requirements. The substrate typically carries a 30-year limited warranty; factory ColorPlus finishes carry a shorter finish warranty, commonly 15 years. Confirm the current terms for the exact product before you rely on either number.
What it demands
Weight — roughly two to three times vinyl per square foot — means two-person handling and proper nailing schedules. Cutting produces silica dust and needs the right blades and controls. Boards must be stored flat and dry, gapped and flashed exactly to the manufacturer manual, and painted within the stated window when supplied primed-only (commonly 180 days). Most fiber-cement failures traced in Atlanta are installation failures at butt joints, roof-wall junctions, and grade clearance, not board failures.
Cost, stated as a range
Lap installed in Atlanta: $8.00–$13.50 per sq ft. Panel-and-batten: $9.00–$14.50. Tear-off adds $1.00–$2.00 where applicable. Worked examples and the estimator live on the cost guide; the rates there and here are the same ledger.
Detail notes — read before specifying
- Keep clearance: typically 6 in. to grade, 2 in. to roofs, decks, and hard surfaces — per the current install manual.
- Flash every horizontal joint that the manual calls for; caulk is a supplement, never the flashing.
- Blind-nail or face-nail exactly as specified for your wind exposure; over-driven nails void more than they hold.
- On pre-1978 homes, treat existing painted siding as potential lead paint until tested.
Profiles. Lap (smooth or cedar-grain texture) for Craftsman, ranch, and traditional elevations; shingle for gables and Cape forms; panel with battens for modern-farmhouse verticality. Mixed elevations — lap field, shingle gable — are period-correct on many intown Atlanta houses.
Paint and colour. Field-painted primed board takes any quality acrylic exterior paint; factory-finished board trades colour freedom for a baked finish and a longer repaint interval. In full Georgia sun, dark colours on any siding deserve a second thought about heat load and fade.
Compare against vinyl and engineered wood, then price your walls on the ledger.