Method of making jacketed foam pipe insulation

A method of making jacketed foam pipe insulation (24) comprising applying hardenable liquid resin impregnated fibrous glass mat (10) to a semicylindrical mold (12), curing the resin in the mat (10) while it is on the mold (12) to form a semicylindrical glass fiber reinforced resin jacket (18), removing the jacket (18) from the mold (12), assembling the jacket (18) in cooperative concentric relationship with a second semicylindrical mold (20) of a smaller radius than that of the first mold (12) to provide a semicylindrical space (21) therebetween, inserting a foamable hardenable liquid resin in the semicylindrical space (21), allowing the liquid resin in the space (21) to expand into foam (26) and harden while adhering to the jacket (18) to form a semicylindrical piece of jacketed foam pipe insulation (24), removing the second semicylindrical mold (20) from the jacketed foam pipe insulation (24), adhering a compressible semicircular pad (28) of fibrous glass wool with a suitable adhesive to one end face of the jacketed foam pipe insulation (24), and adhering a compressible strip (30) of fibrous glass wool with a suitable adhesive to a flat longitudinal face of the jacketed foam pipe insulation (24).