Cement Shingle Siding With Numbers On The Back Asbestos

The portland cement binds asbestos fibers into a hard mass.

Cement shingle siding with numbers on the back asbestos.

Are permit fees always required for removing asbestos built up roofing materials or asbestos cement shingles panels. A brief history of asbestos cement siding. It is available in a variety of sizes and shapes to match many of the old siding shingles installed over the last 60 years. If your siding fits either of these descriptions you should consider having it tested.

Cementious siding and roofing such as fiber cement siding lap siding and fiber cement roof shingles containing asbestos may then have appeared on homes constructed between 1906 and 1980 in north america and contining later in some other countries. Asbestos cement shingle panels roof area 1000 square feet 1000 x 10 100 5. The shingle or artificial slate of this invention comprises a slab of asbestos cement tapered in thickness from one end to the ot er as indicated at1 5 and provided in the back thereof at the lower thicker end with recesses 01 depressions 6 said recesses being separated and defined by an intervening rib or ribs 7 these recesses are shown as extending longitudinally throughout greater portion of the thickened section of the shingle and as tapering in depth from the lower to. These shingles are generally 12 by 24 inches and the bottom tends to have a wave like pattern though that is not always the case.

Testing your siding for asbestos. A hardened mixture of asbestos fibers portland cement and water used in relatively thin slabs for shingles wallboard and siding asbestos siding was first introduced into the us in the early 1900 s by austrian engineer ludwid hatschek. Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials. Asbestos was added to the cement because of its fire retardant properties as well as to add strength and durability to the siding shingles as well as insulating capacity.

Those same asbestos fibers that were being added. He discovered how asbestos could help reinforce thin shingles made from cement. Weatherside fiber cement siding is the one and only solution for replacing or repairing old asbestos siding shingles. After properly removing the old siding 1 simply nail in place and paint there s no caulking required at the joints between shingles.

Asbestos health concerns unfortunately though there was a lurking problem with asbestos that took decades to confirm. The one and only replacement solution for matching or replacing older non existent siding pre primed and ready to paint to match your existing siding or trim. The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar. The use of asbestos siding shingles was a popular one that was used in the us from the early part of the 20th century until the 1970s.

Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.