Why Do Roof Shingles On The South Slope Deteriorate Quickest

Low slope roofing manual of 4th ed c w.

Why do roof shingles on the south slope deteriorate quickest.

Some portions of the roof are affected by prevailing winds more than others. How to cut shingles off the edge of a roof in a straight line. Shingle deterioration tends to accelerate in the final third of a roof s lifespan even under normal conditions. Griffin richard fricklas mcgraw hill professional.

Many do it yourselfers make this mistake before they even begin. South facing roof slopes have shorter lifespans due to increased thermal cycling and uv exposure. As they approach the end of the accelerating deterioration slope most shingles will have common failures. Starter shingles installed incorrectly or not at all.

However a roofing project that is characterized by shoddy or amateur workmanship can lead to higher costs in the long run. Harsh weather is the main reason shingles deteriorate sooner than expected and the following elements are the most common culprit. Leaf debris on the roof especially in valleys the tannic acid seeping though of a pile of rotting leaves in the valley of a roof stains and attacks the shingles while slowing water drainage. The rake edge is the extreme edge of the roof on either side.

Shingles historically were called tiles and shingle was a term. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Shingle is a corruption of german schindle schindel meaning a roofing slate. What is the minimum pitch slope of an asphalt shingle roof.

The edge of a roof in professional vernacular is called the rake edge. That works out to about nine degrees if that works better for you. The minimum requirement is 2 12. If asphalt roof shingles must be applied on such a low slope say for.

According to the national roofing contractor s association nrca and the asphalt roofing manufacturers association arma roofing guidelines conventional roof shingles should not be used on slopes less than 3 in 12 that is 3 of rise in 12 of run on a roof slope. Here are 10 of the most frequently seen roofing mistakes. Roof failure causes in depth and specific methods for avoiding them roof design fundamentals and flourishes based on voluminous industry research and experience. It can damage its structure cause mildew rot decking and even damage the insulation.

6 common reasons behind deterioration of your roof. Shingles of all types need to have a slope to function properly. 4 edition 2006 isbn 10. Rain snow ice moisture is roof s enemy 1.

Roof shingles may deteriorate faster and need to repel more water than wall shingles. Putting a new roof onto a home is an expensive but necessary cost for homeowners. Degree of roof slope.