Vent pipe insulating sleeve

In combination with an upstanding sewer vent pipe projecting upwardly through a roof structure and terminating upwardly a spaced distance above the portion of the roof structure through which said vent pipe projects, said vent pipe being subject to upward flow of high humidity air and sewer gas therethrough and a build up of accumulated ice thereacross as a result of condensation and ice build up within said upper end portion during periods of very cold ambient temperature, an insulation sleeve assembly for preventing said build up solely through utilization and prevention of loss of the inherent heat of vented high humidity sewer gas, said assembly including an outer sleeve of waterproof material, an inner sleeve body of heat insulative material snugly received within, extending the full length of and supported from said outer sleeve, the upper end of said outer sleeve including an annular upper end portion lapped over the upper end of said inner sleeve body, said sleeve assembly being snugly telescoped over substantially the entire upper end portion of said vent pipe projecting above said roof structure with said inner sleeve at least substantially filling annular area defined between the outer surfaces of said pipe and the inner surfaces of said outer sleeve, said outer sleeve and annular upper end portion being of non-metallic low heat conductive construction, said sleeve assembly being of portions extending across the upper end thereof in registry with the upper end of said pipe, whereby there exists no obstruction to the gentle egress of vented gases from the pipe upper end and maximum heating of the pipe upper end and minimum condensation of moisture occurs within the pipe upper end as result of unobstructed venting of sewer gases upwardly through said pipe.