Feb 08, 2013, 07:14 PMdale_eklund
Organic and 3-tab composition asphalt shingles: a brief primer
Organic asphalt shingles and 3-tab composition asphalt shingles are two common options for roofing materials. Comparing organic and 3-tab asphalt shingle roofing will give you an idea of which option to select when the time comes to replace your roof or select a roofing material for a new home.
Organic, in this context, refers to the composition of the core underneath the asphalt shingle's exterior; organic cores are often longer lasting than fiberglass cores. 3-tab refers to the shape of the shingle itself, and is used in comparison with more expensive architectural shingles.
Organic asphalt and 3-tab asphalt shingles do not necessarily fall into separate categories; a 3-tab asphalt shingle can also be an organic asphalt shingle.
The choice of shingle comes down to your budget, your building's location, and how long you would like the roof to last.
Advantages of organic shingles
Disadvantages of organic shingles
Paper core increases flammability
Asphalt content makes them less environmentally friendly
Some varieties are less resistant to wind
Advantages of 3-tab shingles
Lower roofing cost than architectural shingles
Create a more sophisticated look with fewer shingles
More design options
Longevity (some come with warranties of up to fifty years)
(If you are building in an area with high wind, 3-tab shingles may not be the best choice, as they are less resistant to strong gusts. Also, because each shingle contains three individual tabs, careful during installation is required to create a seamless look.)
Disadvantages of 3-tab shingles
Generally, shorter lifespan than architectural shingles
Higher installation costs
Often have low wind ratings
Tend to show roof defects
More of a challenge for do-it-yourselfers
Companies who manufacture both organic and 3-tab asphalt shingles include:
If you want the look of a 3-tab shingle roof with the extended lifetime of the organic shingle core, look for a manufacturer that offers a 3-tab, organic asphalt shingle option.
Original Article: http://www.qualitysmith.com/re...0%93-a-brief-primer/