What is the wind rating for a Class A roof?
This type of roofing material is classified based on wind speed resistance and with wind ratings categorized as follows: Class A (for winds up to 60 mph) Class D (90 mph) Class F (110 mph) Class G (120 mph) and Class H (150 mph)
What is the wind rating on 3 tab shingles?
The wind rating on 3-tab shingles is 60 mph when the shingles have the proper 4 nail per shingle pattern. Architectural shingles, on the other hand, have a rating of 130 mph on them.
How much wind can a shingle roof withstand?
Don’t Just Trust What You Read On A Shingle Package Or Brochure At a glance, all shingles appear very close in wind ratings, ranging from 110 to 135 MPH. What often gets overlooked is what is required to get these ratings. There is one manufacturer who boasts having the highest wind rating at 135 MPH.
What is the passing wind speed for asphalt shingle testing?
Asphalt shingle test specimens passing the two-hour test duration at 60 mph are classified as Class A; those passing at 90 mph are classified as Class D; and those passing at 110 mph are classified as Class F. A statement in ASTM D3161 indicates: "… The results of this test do not directly correlate to wind speeds experienced in service … ."
What wind speed can shingles withstand?
Most modern shingle roofs are rated to withstand 90 mile-per-hour winds, although there are roofing products available for hurricane and tornado-prone areas that can withstand winds up to 150 MPH.
How windy is too windy for roofing?
For significant types of roofing and cladding work, the guidance gives upper limits on wind speeds when work must cease immediately. Most of the work undertaken by roofers must stop at 23 mph (10 m/s), and many other activities have a lower limit of 17 mph (7.7 m/s).
What roof is best for strong winds?
Metal roofing A metal roof can weather hurricane-force winds up to 160 mph, making it the most wind-resistant solution. Metal roofing systems are pricier than cheap shingles, but they last longer and are more durable than any other types of roofing.
How do you protect shingles from wind?
Secure Shingles What to Do: Secure loose shingles with a hammer or nails. Use at least six nails or staples on each shingle. Also, caulk the edges. For extra protection, install waterproof layers under the shingles.
Can you roof in high winds?
Roofs are very susceptible to wind damage, in part because high winds do not hit roofs uniformly. Rather, wind tends to cause damage to the edges of the roof, or areas of the roof that are already loose.
What causes roof shingles to buckle?
Buckling is the result of asphalt shingles not laying flat due to the wrinkling of the roofing underlayment or the movement of the wood deck. During the summer months we normally experience high humidity, and as the old roof is torn off the wood deck is exposed and absorbs moisture.
What are hurricane proof shingles?
For the highest level of wind rated shingle, look for shingles that are rated to ASTM D3161 Class F or ASTM D7158 Class H. For the highest level of impact protection, look for shingles that meet UL 2218 Class 4. Asphalt Shingles. Pros: Relatively low cost, lightweight, and easy to install.
What type of roof is more vulnerable to high winds?
Asphalt Shingles Since they're lightweight, they are affordable and easy to work with, but they're also typically more susceptible to blow-offs.
What is a Class 4 shingle?
To receive a Class 4 rating, a roofing shingle must withstand having a 2-inch steel ball dropped multiple times from a height of 20 feet. For more perspective, if this same test is repeated on a 4-inch concrete paver, the force of the steel ball would crack the paver in half.
Should shingles flap in the wind?
Flapping shingles are harder to spot and fix than missing shingles since they are still in place, but when subjected to high winds, they will flap and settle back down. When shingles start to flap, this is often caused by loose nails or damaged shingles.
Will lifted shingles reseal?
Most unsealed shingles should not be expected to reseal but can be hand sealed with roof cement.
How do I stop shingles from blowing off?
You can change the direction of the exposed raised edge of the ridge cap shingles by installing them – in your case – from south to north, the opposite of your current state. If one direction of wind is more prevalent around your house, this may keep the shingles on the roof longer by keeping the raised edge down-wind.
What is a professional roofing contractor?
A professional roofing contractor or architect can advise consumers on the best choice of roofing material for specific situations. International building and safety codes provide specific installation requirements for wind and uplift resistance to help ensure standards are adhered to and to minimize damage to homes from high winds, ...
What are the concerns of replacing a roof?
Homeowners contemplating the installation of a replacement roof may be concerned about the wind resistance of construction materials used on their homes -- especially in areas with a high concentration of tornadoes or hurricanes.
Does wind velocity affect roof?
Homeowners should be aware that wind velocity varies across a roof and causes different uplift pressures depending on wind gusts, the landscape surrounding the home, the shape of the roof, and the design of the roof edge.
How much force does a shingle need to be to be wind resistant?
ASTM International requires all shingles resist at least 23 lbs of force. CertainTeed (one of the best wind resistant shingle brands in our opinion) requires all their products resist a minimum of 30 lbs. This higher quality control standard has, in our opinion, resulted in a product that leads the industry in wind resistance.
What is wind damage on a roof?
Wind damaged roofs are one of the most frequently used insurance claim categories for homeowners in Southern Ontario. The cost to repair these damages are typically thousands of dollars. Unresponsive roofing contractors and repair lead times after a major storm can cause a great deal of stress and anxiety for homeowners who experience substantial wind damage. Many homeowners are left wondering if they could have done something different to avoid this stress.
What is the nail zone on CertainTeed shingle?
The shingle on the right is the CertainTeed Landmark with its 1 1/2 “ nail zone . Another leading brand on the left has only a ⅜” wide nail zone. It can be near impossible to hit a ⅜” wide nail zone with every nail on every shingle. However, not hitting these nail zones could void your wind warranty.
What is the most important aspect of a wind resistant assembly?
Selecting a quality shingle is likely the most important aspect of a quality, wind resistant assembly. Most brands have comparable wind ratings written on packaging or in their promotional literature. However, our experience has been that a couple of brands seem to outperform the others.
What is the leading cause of wind damage resulting from faulty workmanship?
Improper nailing is the leading cause of wind damage resulting from faulty workmanship. Note the upper nail on the left is fastened in the nail zone, which also fastens the upper portion of the underlying shingle. The shingle on the right is fastened above the nail zone and misses the underlying shingle.
Do you have to have shingle for auto racing?
In auto racing, having the fastest car does not ensure you will win the race. Having a highly skilled driver is also necessary. Similarly, having a high quality shingle is only part of the equation. You also need to choose an experienced installer, preferably one who is manufacturer certified.
What is the wind rating on 3 tab shingles?
The wind rating on 3-tab shingles is 60 mph when the shingles have the proper 4 nail per shingle pattern.
How long do 3 tab shingles last?
You can expect 3-tab shingles to last anywhere from 20-30 years, barring any huge storms and major damage. That makes them even more affordable since they last such a long time. If you need an economical answer to roof replacement, 3-tab shingles offer you longevity, attractiveness, and safety for your home.
Why is a 60 mph rating?
The 60 mph rating is due to the fact that the exposed portion of the shingle is split into 3 individual tabs, making it more susceptible to being lifted when the wind blows at high speeds.
How to tell if shingles are blown off?
Signs of Wind Damage on Asphalt Shingle Roofs. Some signs of roof wind damage are more obvious than others. After a severe weather event, significant wind damage to a roof may be highly visible, such as: A puncture from a fallen tree limb. Large swatches of exposed underlayment where shingles have been blown off.
What are the factors that affect the ability of a roof to resist wind?
The nailing method used to install the shingles, the quality and strength of the fasteners, and the installation temperature can also play a role in the roof’s ability to resist wind. Installation flaws. Misaligned shingles, incorrect nail placement, poorly sealed flashing or the lack of starter strip shingles can all cause increased susceptibility ...
What happens when wind hits a house?
When wind encounters a structure such as your home, it acts in some fairly predictable ways: Wind hitting the side of the home travels up and over the roof with varying degrees of uplift pressure.
What does it mean when shingle edges look raised?
Areas where shingle edges look slightly raised, which tells you the seals may have been broken. Narrow lines near the shingle edges which can indicate they may have been flipped up and creased. Scratch marks across the roof field where wind-borne debris has raked across the roof. Damaged ridge or soffit vents.
How to check for wind damage in attic?
Indoor Evidence of Roof Damage. You can check for potential signs of wind damage inside your home by inspecting your attic and finished living areas. As always, keep safety in mind with anything you do. When going up into your attic be sure to have a sturdy walking path and wear appropriate protective gear.
How to check for roof damage?
How to check your attic for signs of roof damage: Go up to the attic while it’s still light outdoors. Use a flashlight to check for water leaks and stains on the underside of the roof or signs of water damage on the floor.
Why does wind move in circular patterns?
Wind doesn’t always move in a steady, smooth stream — it swirls up, down, sideways and in circular patterns at various speeds in reaction to temperature and pressure differences in the Earth’s atmosphere, and variations in the land’s topography and terrain.
Know Your Roof Is Installed Right
Let the wind blow. Your new roof can handle it and more. New Atlas HP42" shingles stay put in the roughest of conditions — winds up to 150 mph.
We're Not Blowing Hot Air - Wind Protection Matters
The two most important components to keeping shingles attached to a roof — the Sweet Spot nailing area and the double FASTAC® adhesive sealant line — set the new Atlas HP42" shingles apart from the competition. You can be confident that your shingles will stay put.
Bigger Performance. Unforgettable LOOK
New Larger Shingle Size Bigger means faster. Atlas super-size HP42" shingle requires fewer laps — which means installation goes quicker and the crew is on and off your roof in record time.
A Brief History of Shingles Over The Last 35 Years
Shingle Selection
- Selecting a quality shingle is likely the most important aspect of a quality, wind resistant assembly. Most brands have comparable wind ratings written on packaging or in their promotional literature. However, our experience has been that a couple of brands seem to outperform the others. We believe this is due to two main attributes: 1. Nail Pull R...
Professional Installation
- In auto racing, having the fastest car does not ensure you will win the race. Having a highly skilled driver is also necessary. Similarly, having a high quality shingle is only part of the equation. You also need to choose an experienced installer, preferably one who is manufacturer certified. “High Nailing” or placing fasteners outside of the manufacturer’s nail area is one of the most common …
Additional Advice For Homeowners
- Now that we’ve covered the two most critical aspects of achieving a high wind resistant roof system, I’d like to list a few other important factors: 1. Avoid Winter Installations Installing roofs in cold weather can delay the activation of sealant strips, as they typically need around 5-10 Degrees Celsius to adhere properly. If your roof is installed during a consistently cold time of the year, yo…