Installing Landmark - five course pattern, alternate closed cut valley & skylight flashing
Landmark Installation
This installation video reviews five course application of CertainTeed's Landmark shingle product, as well as alternate closed cut valley and skylight flashing application.
When the mercury drops, construction doesn’t stop—but it sure gets trickier. Cold weather can turn routine installations into a real test of skill and patience. Materials stiffen, adhesives struggle, and moisture lurks as a silent enemy.