View of the main roof. Rigid insulation like the ones seen in the distance have been spread across the roof in layers up to twelve inches thick, and sloped down to six inches along the drains. At The Renaissance we easily surpass the recommended roof insulation value of R-30! On top of this rigid insulation, a rubberized highly durable waterproofing (EPDM) membrane is applied. To reduce the strain of the elements on this rubberized membrane, a two-inch thick layer of river washed stone is applied over it. Because of the light grey colour of the stones, once the roof is completely covered, these stones greatly aid in deflecting heat from the sun’s rays; unlike the more common black tar and felt roof system. Another great advantage of our roof system is that it comes with a 15 year warranty. Traditional black tar and felt roof systems typically come with only a three year warranty.