For the most part, metal roofing manufacturers have improved their products to address or solve many of these concerns:
- Cost - The biggest drawback is initial cost. Metal roofing is equivalent in cost to other roof coverings.
- Noise - For some, the sound of rain tapping on the roof is romantic and homey.
- Denting - Just as your car will dent if a golf ball hits it, a metal roof can dent if large hailstones fall on it.
- Chromodek Finish & Care - Some painted metal roof finishes can peel, chip, fade, scratch, or chalk.
- Leaking - Roofs with exposed fasteners are particularly vulnerable to improper installation.
Chromodek or Zinc Alume sheeting beats out conventional roofing materials in several ways:
- Expected life - Properly installed, a metal roof should last as long as the house, sealing out water, surviving high winds, and most weather conditions.
- Weight - Compared to the weight of concrete tiles at around 60kg per m2 , metal roofing is very lightweight and sheeting is around 5-10kg per m2.
- Speed & Ease of Roofing Installation - Metal roofing materials come in multiple- sections between 686mm to 762mm wide that are rolled out to the exact roof length.
- Fire Resistance - Because metal roof materials are non-combustible, they typically have a Class A fire rating (the most fire-resistant rating).
- Heat Conduction - Metal reflects radiant heat from the sun, minimizing midday heat gain.
Minimal Roof Pitch
Minimal Roof Pitch – Most metal roofing materials can be installed on gently pitched roofs without leaking. Minimum roof pitch typically is 2 degrees on concealed roof sheeting, 5 Degrees on IBR and 10 degrees on Corrugated profiled sheeting.