For the purpose of the Washington state public works law, chapter 39.12 RCW, roofers apply and install any and all types of roofing materials, other than sheet metal. The work of roofers includes, but is not limited to:
All cementing in, on or around slate and tile roofs.
All laying of felt or paper beneath the slate and tile.
All dressing, punching and cutting of all roof slate or tile either by hand or machinery.
The installation of all damp resisting preparations when applied on roofs with mop, three-knot brush, roller, swab or spray system.
All types of aggregates, blocks, bricks or stones used to ballast these elasto-plastic systems.
All types of aggregates used as a ballast for inverted roofing membrane assembly, or roof of similar construction where the insulation is laid over the roofing membrane.
All sealing and caulking of seams and joints on these elasto-plastic systems to insure water-tightness.
All liquid-type elasto-plastic preparation for roofing, damp or waterproofing when applied with a squeegee, trowel, roller or spray equipment.
All sheet-type elasto-plastic systems, whether single or multi-ply, for waterproofing.
All priming of surfaces to be roofed, damp or waterproofed, whether done by roller, mop, swab, three-knot brush, or spray systems.
All types of preformed panels used in waterproofing.
Wash. Admin. Code § 296-127-01370
Statutory Authority: Chapter 39.12 RCW, RCW 43.22.270 and 43.22.051. 00-15-077, § 296-127-01370, filed 7/19/00, effective 7/19/00.