Two questions please?
Have you seen similar cracks in certenteed laminates? I’m trying to decide between timberline and landmarks?
My local roofing supply told me 40 year timberlines weigh 300 lbs per square and 30 years weigh 240 lbs per?
I want to keep the load on the roof as light as possible so was thinking i’d go with 30 year but 265 is not much more than 240 if you are sure about that weight? Does anyone know the actual weight of certainteed landmark 30 and 40 year shingles for comparison?
I have not seen cracks in the Certainteed Landmark line, nor have I heard of 1 warranty claim with that line of shingle. Going back 10+ years the Landmark was made in English specs but since then the shingles have only gotten better. Here in Minnesota the Shakopee shingles are produced with a number of 3M inovations. Of course all contractors can agree on the fact that Certainteed has had it’s issues with deffective shingle, mainly in the organic line.
Every region’s shingle weight will vary.
Here are Certainteeds weights for the North Central Shakopee, MN plant
Landmark 30=245lbs per square
Landmark 40=265lbs per square (Plus)
Landmark 50=300lbs per square (Premium)
Landmark TL Ultimate=340lbs per square, 110mph for 10 years
Wind warranties are,
30=70mph for 5 years
40=80mph for 5 years
50=90mph for 10 years
My conpany is a Shingle Master company and we are able to give a 4 Star warranty at $3 per square which brings the Landmark 30 wind warranty to 110mph for 5 years. We run the Certainteed Swift Start on both the eaves and rakes. The $3 per square also brings the Sure Start warranty from 5 to 15 years.
What I do know is in some regions the Landmark Premiums can weight as much at 330 lbs per square.