b'TECHNICAL & RESEARCHContinued from page 14The third optiona combination of structural steel and tapered insulationis optimal. Primary drainage is accomplished by slope in the structure. Tapered polyiso crickets, with a slope of 1/2-inch per foot, supplement this by providing lateral movement to the drains and around projections.Follow the 50 Percent Rule Building The wider a cricket is, the faster water will flow to the drains or scuppers. Full diamonds should be used in theroof repair center of the roof and half diamonds used against walls.solutions Following the 50 Percent Rule ensures the cricket is properly sized to provide sufficient drainage. It directsaround that the half cricketthe distance from the center of the diamond or half diamond to a cornershould be half theyoudistance between the drains or scuppers; for example, if the drains or scuppers are 24 feet apart, the half cricket should be 12 feet.Proactively Prevent ObstructionsRoof penetrations in valley lines obstruct the flow of water to drains, creating landscapes ripe for ponding water. A simple proactive step, taken during the design process, can prevent these obstructions and the change orders needed to correct them change orders that can cost many times more to implement than if the roof was designed properly in the first place. Computer-aided design tools can be used to overlay the framing, electrical, HVAC and mechanical plans onto the roofing plans. Obstructions can then be identified and addressed by moving the projections (the ideal remedy) or by elevating the curbs and specifying additional and opposing crickets. Continued on page 16No matter how big or small your operation, sending a crew for a simple TPO repair can throw a wrench into a profitable day.What if you could send ONE roofer because their repair kit fits into a big ol knapsack? Send them out with the NEW lightweight and compact GAF Commercial Maintenance and Repair line of products.The line includes handy aerosol primer, cleaner, and adhesives; and a hand-held, battery-powered welder. Were buildingright-sized roof repair. Around you.Learn more at gaf.com/repair2025 GAFCOMGNAD014-1124'