It is illegal in Kansas City to have more than 2 layers of shingles on your house. Even if you only have one layer, it is usually a good idea to strip any old shingles from your roof. This will allow you to examine your existing roof sheeting. In some cases, dry rot can occur below your shingles causing the need for repair.
Does a 30 year shingle really last 30 years?
Typically a shingle will only last 75% of it's suggested lifespan.
Why does a roof need ventilation?
Proper ventilation in a roof is an important factor in getting the longest lifespan out of you new roof. Without proper ventilation, the warm summer air can not escape and can cause rot to your sheeting and shingles.
