Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos.
How to determin asbestos roofing vs slate.
Found as an underlayment for both pitched and flat roofing.
Determine when the shingles were installed on your roof.
The weather would erode the cement not the asbestos.
A ladder hook is inexpensive and works pretty well on asbestos roofs.
1 8 to 32 pounds depending on thickness.
Asbestos roof tiles were used from the early 1920s all the way in to the late 1980s.
Asphalt tar paper this is probably the most prevalent acm asbestos containing material found when doing remodels for roofing projects.
But because asbestos cement roofing is easily damaged by a heavy footed worker unfamiliar with the materials involved asbestos cement roofs have to be repaired and maintained with the same care and expertise as slate roofs.
Based on slate s successful performance as a steep slope roofing product we consider a roofing product should have a minimum handleability index of 8.
8 to 64 pounds depending on source and orientation to grain.
If you don t know the age of the shingles inspect them for wear.
The asbestos fibers inside slates can only be released when they are broken and this roofing material does not necessarily require removal although many people choose to do it.
However asbestos can also often be found in roof shingles or tiles.
Asbestos tiles would be thinner and be fibrous stuff embedded in a tarpaper backing.
Their color ranges between grey light green peachy orange and even purple.
We consider asbestos cement roof shingles a durable and fire resistant roof and an asset to the building provided that the roof is in good condition.
This is because until the 1980s asbestos was not fully recognised to be hazardous to the health of anyone exposed to its fibres.
Manufacturers from about 1940 mid 1970 s used asbestos in the this base material.
Over time asbestos shingled roofs take on a weathered appearance that looks a lot like slate.
On diamond shaped tiles use two hooks one at 4 o clock and one at 8 o clock see below.
It s only good for 80 100 years not bad i had a slate roof that started doing that in one area it apparently was from a lower quality batch than the rest of the roof.
If the asbestos surveyor wanted to survey the whole house you could have just said no i just want the roof slate testing.
Slate hooks work well for fastening replacement tiles in place.
When you use slate hooks you don t have to drill the tiles or caulk anything.
Health safety concerns related to the removal of asbestos containing roofs.
It sounds like slate that is reaching the end of its lifespan.
Older building have a higher probability of containing asbestos building materials.
