A systems approach combines high-performance components underlayments, shingles, accessory products and ventilation to make the Integrity Roof System a complete roofing solution. When you choose an Integrity Roof System, you gain the advantage of having CertainTeed as your single manufacturing source to stand behind its roof system components. Hip & Ridge Accessories Accessory shingles are used to finish the hips and ridges of the roof and are designed to complement the appearance of certainTeed shingles. CertainTeed Shingles High-quality shingles available in a wide variety of styles and colors, covered by the strongest warranty in the business. Flintlastic roll roofing products are also available for flat roof areas. Roofers’ Select or DiamondDeck High-performance underlayment provides a protective water-resistant layer over the roof deck and a secondary barrier against leaks. Winter Guard Waterproofing shingle underlayment prevents leaks from wind-driven rain and ice dams in vulnerable areas. An shingles are designed to work specifically for each different type of CertainTeed shingle for maximum performance!