A brief history of asbestos cement siding.
Asbestos siding and asphalt siding house.
The portland cement binds asbestos fibers into a hard mass.
Lead paint wasn t outlawed until 1978 so it s sure to be present on siding going back to the 1950s.
This old house has asphalt siding the type that comes in panels that measure about 18 x 28 inches designed to look like several courses of brick.
If you suspect that your siding may contain asbestos there is no need for alarm.
Nonfriable means they cannot be broken up by hand pressure.
This was done in order to add fireproofing and stability to cement siding so that it wouldn t crack or break as easily.
Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.
Asbestos shingles are relatively strong but.
Asbestos ranks high on the list of dangerous substances because of its toxic and carcinogenic properties when airborne.
Let the siding dry then prime and paint with the best exterior latex you can find.
Some asphalt siding may contain asbestos in the asphalt impregnated felt backer or asbestos may also be in the asphalt impregnated paper tar paper or felt used as a house wrap under the siding.
Alternatively if you leave the asbestos on your home you can safely seal the old siding underneath the new siding and because asbestos is an excellent insulator you will actually be adding to the energy efficiency of your home by leaving it on.
Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials.
It is very difficult to remove spray paint graffiti without also dissolving or discoloring some of the siding surface coating material itself.
Covering old asbestos shingles with new siding may seem like an option too but it s not easy to do safely.
Asbestos siding was essentially a cement siding product that asbestos fibers had been added to.
This article provides photographs of asphalt based siding products and discusses common defects observed in asphalt exterior building siding such as buckling splitting cracks odors and questions about the need for a vapor barrier behind asphalt siding and over building sheathing.
Installing vinyl siding will require disturbing the asbestos by nailing into it.
Asbestos house siding was used in many homes until the epa banned its use in new products in 1989.
Unless asbestos siding is disturbed it doesn t pose a significant health hazard and does not need to be removed.
Asphalt or cement roofing and siding that contain asbestos when intact and in good condition are generally considered nonfriable and are not hazardous.
