At Harv Ginter Construction we use Johns Manville Spider® Plus fibre glass blow-in insulation. This insulation features interlocking fibre technology which is the next evolution of the JM formaldehyde-free™ insulation family. This technology allows the fibres to spring and lock into cavities with no adhesive or netting. This complete coverage results in superior thermal performance and sound control. With a simple installation that’s typically faster than other spray systems and unprecedented drying times.