CLIMATE ZONES FOR ROOF SYSTEMS

Climatic conditions vary considerably over the United States forming similar climatic divisions which when grouped together form climatic zones. The National Oceanic and Atmospheric Administration (NOAA) defined these regions within a state that are as close to the same climatic condition as possible. Each NOAA Climatic Division is placed into one of five climate zones. Based on its 30 year average heating degree-days (HDD) and cooling degree-days (CDD) for the period from 1971 through the year 2000. This database is continually updated. Based on this knowledge, roofing materials for the specific climatic zones are recommended by the manufacturers. The Roof Guys are taught these technical recommendations and hold to these standards when applying your roofing systems.

Map of Climate Zones

Climatic problems that affect roofing systems most are:

Hail

Wind

Lightning

Sun/UV

Extreme Temperatures

Fire

Climate/Roof System

Different regions of the United States are subject to different weather patterns. As such, each region has special roofing requirements that you must be sensitive to either in the industry or as a homeowner looking to roof repairs or replacements.

There are five primary roofing materials approved by the Institute for Business and home Safety:

Tile become brittle as they age and ultimately need replacing they are prone to developing cracks. As water gets into the cracks, the liquid freezes and then expands, causing the tile to break. A tile roof is also rather heavy. Though tile is a reasonable roofing material for areas with a lot of moisture or very cold winter should take into consideration the weakness of this material.

Metal roofing is especially popular for low or steeped roofs. This is so because there are no shingles, therefore the slope of the roof is not an issue. Although metal roofs can receive cosmetic damage from hail, you can buy metal product which is rated for high impact. Additional to the ability to resist damage caused by hail, metal roofing is highly fire resistant. In areas prone to brush fires like the South west United States metal roofing is required for all buildings abutting the tree line. Metal roofing is not without its disadvantages though, as it is two to three times as expensive as asphalt.

Asphalt shingles reinforced with fiberglass are relatively low cost, easy to install and are highly resistant to fire. They should be used in regions where hailstorms occur. Asphalt shingles have wind warranties of up to 130 miles per hour available. Properly installed, shingles could survive 15 to 25 years. High-end asphalt shingles can come with 50-year warranties.

Slate outlasts just about every kind of roofing material. It is so strong that hail would have to be the size of cannonballs to put a dent in it. It is also the most expensive roofing material. Slate roofs require special care and attention, and slate qualified roofers to make repairs and replacements. A downside of slate is that it is incredibly heavy as it is a naturally occurring stone. The underlying structure of the roof must be able to hold the weight of the stone.

Wood is good in dry climates, although it can suffer a lot of damage in hailstorms and, unless it is treated with a retardant at the factory, it is not fire-resistant.

We are proud to say that we now have 3 generations of the Walker family in the roofing business to carry on the Roof Guys company name. We must be doing something right.

 

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