All Vermont slate is premium slate A HailFire™ roof stands up to weather and climate conditions like no other because it is “the best of the best“.
Unsurpassed performance in roofing by every measure
HailFire™ roof performance goes well beyond its well-deserved, highest industry ratings — qualifications that other materials might just barely meet. The natural physical characteristics of Vermont slate is the basis of a HailFire roof. Only natural stone could provide these benefits:
- ASTM-S1 quality – far exceeds the highest available slate rating for strength and longevity.
- FM 4473 Class 4 – It more than meets the highest class rating for hail impact resistance. It’s in a class by itself!
- Miami-Dade approved for use in hurricane zones.
- Up to 40% less roof weight available when installed using SlateTec.
- “Walkable” after installation.
Superior impact resistance: The rigidity and density of premium Greenstone HailFire™ slate gives it extraordinary resistance to hail and other types of impacts. The Greenstone Vermont slate used in HailFire™ (see below table) has been lab-tested to repel 2-inch hail weighing 0.3 lbs traveling 120MPH, well beyond the ASTM Class 4 rating level.
100% Fireproof: It’s just a fact: Like all slate, it is stone. It simply does not burn.
The 100-year roof! Beyond the prestigious ASTM S-1, 75-year life expectancy rating, the slate in a HailFire roof is backed by Greenstone’s 100-year warranty.
Waterproof: Greenstone HailFire slates are virtually impervious to water.
Unaffected by temperature extremes and moisture: From the hot southern summer sun to the coldest day of a northern winter, a HailFire roof will not appreciably expand, contract, warp, discolor (other than natural weathering of some colors) or be otherwise affected.
Genuine Vermont S-1 slate combined with cutting-edge installation techniques and materials
Extended protection: A HailFire™ roof has an additional layer of protection because it is installed using the patented SlateTec™ installation system. SlateTec’s “interlayment” layer under the slate protects the integrity of the deck even if a slate is damaged or missing.
Independent lab tests confirm that the SlateTec interlayment as a stand-alone material achieves Class 3 testing. In addition, SlateTec interlayment “cushions” the slate, enhancing the slate’s impact resistance.
40% less weight: A HailFire™ slate roof weighs less—not because the slate itself weighs less — because it uses less slate! The SlateTec™ installation system makes this possible because SlateTec’s interlayment reduces the amount of overlap (technically known as headlap) that traditional slate installations require. Therefore less slate is required, reducing the overall weight of the roof compared to a traditional slate installation.
Or call 800 619 4333 to speak with a Greenstone Slate sales representative
HailFire™ is 100% fireproof
HailFire™ earned the best hail rating: Class 4
HailFire™ is Miami-Dade approved for hurricane zones
Installing a HailFire™ reduced weight roof
HailFire™ Resists 121mph Hail Impact
Slate is not only rugged, it is considered one of the world’s most beautiful roofs
Slate’s extended life expectancy and durability create an overall low cost of ownership. That’s why it is frequently the choice for fine residences but also for institutional applications such as colleges, churches and government buildings.
More HailFire benefits
- Its density provides an insulating factor that helps save energy.
- Slate is impervious to fungi and mold.
- Slate is sustainable, keeping five or more asphalt roofs out of a landfill, and has no environmental impact upon disposal.
- Unlike traditional slate installations, a HailFire roof is walkable once installed.
| Specifications |  Architectural Grade | Heavy Grade | Estate Grade |
|---|---|---|---|
| Slate Colors | All Greenstone colors | All Greenstone colors | All Greenstone colors |
| Slate thickness | 3/8" to 1/2" | 1/2" to 3/4" | at least 3/4" |
| Weight per square | < 8 lbs/sqft | < 10 lbs/sqft | < 14 lbs/sqft |
| Installation* | SlateTec™ | SlateTec™ | SlateTec™ |
| Walk-ability | Yes | Yes | Yes |
| Miami-Dade approved | Yes | Yes | Yes |
| ASTM rating | S-1 | S-1 | S-1 |
| Slate fire resistance | 100% | 100% | 100% |
| Water absorption | <0.0025 (ASTM S-1) | <0.0025 (ASTM S-1) | <0.0025 (ASTM S-1) |
| Impact resistance | Class 4 | Class 4 | Class 4 |
| Interlayment impact resistance | Class 3 | Class 3 | Class 3 |
HailFire Colors
HailFire™ is available in all Greenstone genuine Vermont slate colors. The colors are natural stone and will vary to a degree so that every slate roof is unique and has its own character. The colors are often mixed to create a certain overall hue. Count on us for advice on color blends of two more slate colors that commonly work well together. View our project gallery for slate color ideas!
Greenstone HailFire™
