Not always, code allows the contractor to install only one other layer of shingles over the existing. When ever there are already two layers of shingles they must be removed, the main reason is not to exceed the safe weight limit of the roof structure.
A roof that breathes is shown to perform better and last longer. Ridge vents in combination with intake vents allow air to flow on the underside of the roof deck keeping the attic cooler.
Yes it does! Light weight low quality tar paper will wrinkle when wet, is only minimally water resistant and degrades faster. Synthetic and composite underlayment is waterproof and lasts much longer.
The life span of the roof is very dependent on the quality of the shingle and underlayment. Higher quality shingles and underlayment can last 30 years in Hawaii, lower quality products might only last 15 years.
A typical 2000 sq. ft. roof will take 3 to 4 days.
We perform a thorough survey of your existing roof to make sure we have all the information we need to provide a complete proposal. We will then sit down with you to go over which type of shingle, underlayment, venting and flashing options you would like. Once we have all the information we present you with a complete proposal with no surprises.
Weight! Heavier weight means a better quality shingle because it’s thicker with more materials to last longer.