Metal’s Freeze / Thaw Cycle Resistant Roofing Benefits
Freeze / Thaw Cycles
Metal roofs do not absorb water or moisture, making them impervious to the damage caused by repeated freeze and thaw cycles. When water freezes, its volume increases. If the water is trapped in a confined space such as a small crack, it exerts tremendous pressure to the surfaces around it once it freezes which can cause the surrounding materials to break under the pressure. Anyone who has ever frozen an unopened aluminum soda can has probably witnessed this phenomenon first-hand as the can will rupture, spilling the contents. Similarly, water that seeps into the cracks of porous roofing materials such as wood shakes or asphalt shingles produces damage when it freezes during periods of cold whether. Repeated cycles of freezing and thawing continue to deteriorate porous roofing materials by producing cracks and ruptures that continue to grow with time. The resistance of metal roofs to this type of damage is the reason they are very popular in severe weather areas that experience heavy snows and ice.