Myth #3: Metal Edging Along Roof Eaves Prevents Ice Dams and Roof Damage
. . .FALSE!!
Metal edging (aka skirting) along roof eaves is often used to prevent damage from ice formations. Unfortunately, this well-intended approach creates a new set of problems that causes leaks and property damage.
When ice dams do fall off the roof, a new ice dam develops at the snow fracture, often at or above the building wall line. This not only promotes leaks, but also damages the transition between the metal and composition shingle roofing.
Here’s a close up of the extensive damage this metal-edged roof endured. So severe was the ice movement that it flattened the transition metal and the metal roofing ribs punctured through it. This roof leaked in many locations.
Worthy of noting is that just two years prior this metal edging was a $5,000.00 attempt by the owners and the building contractor to stop the ice dam damage.
The metal edging was completely removed and Radiant Edge was installed with new shingles to tie into the old roof. Ice formations and ice dam leak problems are now a thing of the past.
The transition area between shingles and metal edging is a complex array of fasteners, clips, ribs, closures, starter strips, overlaps and transition metal. The entire area and all parts are flooded by the ice dam which creates many opportunities for leaks.
This home had the metal edging installed at the time of construction. The shingles uphill from the metal get damaged (leaving the interior of the home more vulnerable than ever.)
The resulting ice dams began to leak, as noted by the shovel hack marks through the metal panels in an attempt to stop the leaking.