This Synthetic Cedar Roof have replaced real cedar roof previously there. The biggest difference is that this Synthetic Cedar roof have 50 year warranty and not like the real cedar roof which lasted 13 years before it begin to leak in 5 places will out last the real cedar roof 5 times. Leska have upgraded all the flashing true out with 100% copper and underlayment is hight temperature Titanium PSU. Stainless steel roofing nails were used. Solid pieces were used in the valleys so it looks like real cedar roof.