I'm considering having these installed when I get a new roof. This will be a tear off job with three layers being removed.
Will these plastic moldings become brittle and possibly crack under the weight of snow in the cold weather? Would they crack if when walking around on the roof if you somehow step on the edge of the roof? If they do crack then wouldn't it be a royal pain to replace and reinstall them? Wouldn't any cracks create a direct route for water to enter the interior roof?
If you bang it hard with a hammer or a ladder, I suspect that it could crack in cold temperatures, especially after the UV Rays of the Sun degrade it a bit and the plasticizers leach out of it, but I have heard good feedback on that Intake Ventilation Solution from some contractors who were too intimidated to try the Smart Vent from DCI Products, Inc. or TheEdge Intake Vent from Air Vent Corporation.