MH Belly Repair - Soft Bottom Patching

Select sealants that:

are compatible with their intended surfaces,

allow for differential expansion and contraction between dissimilar materials,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) sealants that meet independent testing and verification protocols

Select materials that:

adequately support applied load and are permanent air barriers, and

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers).

Remove any material from the sealing and patching area that will prevent full adhesion of the selected sealant and patch material

Install patching material over all holes lapping a minimum of 3" over the surrounding material

Apply a continuous bead of sealant under the patch that creates an airtight seal

Attach patches using outward clinch staples ("cinch staples") spaced no more than 2" apart

Install only noncombustible materials and sealants with an ASTM E136 listing in contact with any device producing 200 degrees F or more (chimneys, vents, flues, etc.)