4.1088.6 Installing Insulation at Flat and Cathedral Ceiling Transition Wall

Topic:

Attics

Subtopic:

Special Considerations

Desired Outcome:

Consistent, uniform thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow and air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary between the conditioned space and unconditioned space

Manufactured Housing

Title	Specification(s)	Objective(s)
4.1088.6a Insulation installation verification	A visual inspection of the highest point of the transition wall will be completed Access points will be determined from the gable end, roof, ceiling, or interior paneling	Verify the height and the accessibility of the attic
4.1088.6b Access attic	Attic will be accessed through the location that allows the most efficient and effective insulation coverage	Gain access to the flat and cathedral ceiling Cathedral ceiling A condition in which the ceiling has the same slope as the roof transition wall
4.1088.6c Blowing	Blowing machine pressure test will be performed with air on full, feed off, and gate closed Insulation will be blown against the transition wall until the wall is covered	Ensure machine is capable of delivering uniform insulation density and coverage to meet manufacturer specifications for loose blown insulation Create a thermal barrier at the transition wall
4.1088.6d Spray two-part foam	Insulation will be installed to prescribed R-value in accordance with manufacturer specifications Spray polyurethane foam ( SPF SPF Spray polyurethane foam ) will be applied to desired thickness, using pass thickness maximum as indicated by manufacturer	Insulate and seal transition wall
4.1088.6e Batt	Batt insulation will be installed in accordance with manufacturer specifications without gaps, voids, compressions, misalignments, or wind intrusions Insulation will be installed to the prescribed R-value Vapor barrier Vapor barrier A material that retards the passage of water vapor and contains a perm rating of less than 1 will be installed based on regional considerations	Insulate to prescribed R-value
4.1088.6f Patching and sealing access points	Created access points will be covered and sealed in an aesthetically pleasing manner Existing access points (e.g., gable vent) will be returned to the original condition If existing trim was removed, it will be reinstalled	Create an airtight seal Create an aesthetically pleasing finish
4.1088.6g Verification of details	Installation process will be considered complete when installer has verified that damage has not occurred to the roof or ceiling assemblies during the installation process	Verify the integrity of the house has been maintained
4.1088.6h Onsite Documentation	A dated receipt signed by the installer will be provided that includes: Insulation type Coverage area R-value • Installed thickness and settled thickness (settled thickness required for loose-fill only) • Number of bags installed in accordance with manufacturer specifications (for loose-fill only)	Document job completion to contract specifications Confirm amount of insulation installed Comply with 16 CFR 460.17