However there are a number of factors that could cause damage such as.
Slate roof and hail.
External impacts are not limited to hail but may be from windborne or thrown rocks golf balls or even bullets.
Note the aluminum vent above.
2 thin soft or deteriorated slates that are relatively fragile such as older pennsylvania soft black slates.
However unlike these other roofing materials vermont slate hp is factory warrantied against hail impact damage of any size for the first 20 years.
The first section of the video shows poor repair work from previous contractors on the vermont slate roof.
Genuine vermont slate a natural stronger alternative to synthetics astm s1 quality the highest available slate rating for strength and longevity.
After that it reverts to the standard warranty for hail of two inch diameter or less for 30 years.
The damaged slates should simply be replaced.
It has been beat to death by the hail but only a few of the slates have been damaged.
But metal clay and slate roofing can also be difficult.
In most cases slate roof tiles are resistant to hail damage and other impact damage.
Hail damage to other types of roofing systems shingles might be the trickiest type of roof to assess for hail damage.
Clay and slate roofs will usually have cracks or gouges when the stones hit while metal roof repair will show dents from the impact of the hailstones.
1 very large hail.
In deciding whether damage is from hail it s important to look at the overall pattern of damage across the roof.
A roof with a single layer of slate is more likely to develop leaks as the result of a hailstrike.
And 3 slates installed in a side lap style where much of the roof has only a single layer of slate.
Natural slate hail testing results the testing was conducted on north american produced s 1 rated natural roofing slate by architectural testing of southlake texas in accordance with factory mutual fm 4473 specification test standard for impact resistance testing of rigid materials by impacting with freezer ice balls.
Hail damage to a slate roof is easily identifiable.
A hailfire roof protects against weather and climate conditions better than any other roof.
The second section of the video shows the affects of hail damage on slate roof.
Fm 4473 class 4 the highest class rating for hail impact resistance.
Although slate tends to be durable and resistant to hail damage there are three primary conditions that will maximize hail damage to a slate roof.
On june 6 2018 hailstones the size of baseballs hit parts of north texas from carrollton to coppell to arlington with significant property damage.