News flash! If you want to keep water from seeping into your home, hop on the roof. Flashings refers to weatherproofing chimneys, vent pipes, windows, door openings, and other places where water could potentially penetrate the interior walls. Water penetration can cause interior mold and mildew. Roof flashing materials including lead, aluminium, copper, stainless steel, zinc alloy, and other thin, pliable substances. Vent caps are sleeves that protect ventilation pipes from surface cracks. Metal flashing tends to channel water to leaders and gutters, then away from the home. We have many ducting venting supplies, including, vent adapters, ducting hoses, and roofing boots.