So, are you saying that it's just "what you are used to" and there's no real discernible difference between 'em? 9quote)
I stated that it was a preference among S.W Missouri contractors.In many regions certain materials are popular by majority.
I also think Certainteed is the best manufacture hands down.But It varies by region.
Do I have documented proof which is the better? No.,am I stated that Tamko is better than GAF ?,,not necessarily.Do I prefer Tamko over GAF? yes.Does my preference mean anything? Probably not.
But I am sure that I am not alone in saying that most shingles have lowered in quality since as little as 10 years ago.
The only manufacture that has maintained a strict guideline with manufacturing roofing products is Certainteed.But once again that is my opinion and against the majority it means little.
It goes back to my initial reply saying that it really depends on who you ask and the area you are asking in.
I have installed thousands of squares of Tamko and thousands of squares of GAF,O.C,Atlas and Certainteed.
My opinion is that back in the day GAF Timberlines were a heavy duty shingle with rigid looks and awesome high definition colors.Now my opinion is they have become a lower quality shingle.I feel they have lost that thick,rigid shake look.But that's my thought.
I will use them right now,,,if the customer chooses.I give customers several manufactures to choose from.Tamko,Certainteed,O.C,GAF and Atlas.They are the ones who choose Tamko.It might also be that Tamko has a planet 60 miles away.Some areas like to keep local plants going by investing in your home state.