This website is provided by Joseph Jenkins, Inc., The Slate Roof Experts.
How to Repair an Asbestos Roof
Sources of Asbestos Roof Tiles
(e.g. slate) roofing contractors will repair asbestos roofs for three
1) No one
else will do it;
2) They are good roofs and will last a long
time if maintained;
Removal and replacement of the entire roof can involve the
EPA, OSHA, moon suits, and costly asbestos abatement procedures.
ROOFS ARE NOT AN ENVIRONMENTAL HAZARD UNLESS THEY ARE
BROKEN OR CRUMBLED AND THE DUST IS INHALED. THAT IS WHY,
*WHEN REMOVED*, THEY FALL UNDER HAZARDOUS MATERIALS
REGULATIONS. IF LEFT IN PLACE, IRONICALLY, THEY MAKE A GOOD ROOF.
long do asbestos roofs last? It is not unreasonable to
expect 100 years from a properly maintained asbestos roof. There
is more information about asbestos roofs in the Slate
are at least three types of asbestos shingles. Regular flat
shingle tiles (standard lap) are shown below, as are common diamond shaped
tiles, and side-lap tiles. It may be difficult to find asbestos replacement
tiles that match the original roof in color, although
we link to a page listing sources
of asbestos tiles. You can often take tiles from an unseen portion of the roof, such as a back dormer, and use them to repair the more visible areas. Then reroof the "cannibalized" area with something that works, like other asbestos tiles, or even natural slate, maybe salvaged.
is a brittle and fragile material. It cannot be walked
on as the tiles will crack and these hairline cracks, which
are hard to see, will leak. Asbestos tiles can be cut with
a slate cutter, some of which,
in fact, were originally manufactured to cut asbestos tiles.
This tool will also punch holes in asbestos tiles - no
small feat as they tend to crack otherwise. You can also
put holes in asbestos tiles by using a small masonry drill
bit (3/16 inch, for example). You can work on asbestos
roofs by using hook ladders. A ladder hook is inexpensive and works pretty well on
asbestos roofs. Slate hooks work well for fastening replacement tiles
in place. On diamond shaped tiles use two hooks, one at
4 o clock and one at 8 o clock (see below). When you use
slate hooks you don't have to drill the tiles or caulk
anything. You can also use copper
nails to nail the asbestos tiles back in place after
taking the roof apart (such as when you replace flashings).
The last (top) row of tiles, however, will probably have
to be installed with slate hooks.
Here is an illustration showing how to use slate
hooks to repair an asbestos roof (from the Slate Roof Bible, 3rd Edition).
chimney flashing replacement job on a standard lap asbestos roof in Grove City, PA