4.1003.10 Installing Fiberglass Blown Insulation for Flat, Bowed, or Vaulted Ceilings (via Interior Access Through the Ceiling)

Topic:

Attics

Subtopic:

Attic Ceilings

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)
4.1003.10a Attic, ceiling, and roof verification	All combustion appliance flues will be terminated to the exterior of the house and terminations will maintain proper clearance above snow loads A distance no less than 2" will be maintained between any combustion appliance flue and combustible materials, unless zero clearance flue is in place All ventilation systems will maintain a continuous connection and terminate to the outdoors All broken mushroom vents will be replaced or removed and sealed All plumbing stacks will be terminated to the outdoors Non- IC IC Insulation contact rated light fixtures will be replaced with airtight IC IC Insulation contact -rated fixtures, if feasible and only when installed measures will compromise the fire rating of the fixture All recessed lights will be labeled as having an air leakage rate no more than 2.0 CFM CFM Cubic feet per minute when tested in accordance with ASTM ASTM ASTM International, www.astm.org E 283 at a 75 pascals pressure differential All obvious ceiling penetrations will be sealed The space between combustion appliance flues and the ceiling will be sealed with fire-rated materials All roof, attic, and ceiling assemblies will be structurally sound: Loose ceiling panels will be secured Temporary ceiling bracing will be recommended while installing installation Dishing and pooling issues that allow standing water will be addressed All known roof water leaks will be repaired before installing installation	Ensure occupant and worker safety Verify attic space is ready to insulate Ensure structural integrity of the roof and ceiling assembly Prevent intrusion of bulk moisture Prevent damage while installing insulation
4.1003.10b Construction prep	Special precautions will be taken to limit fiberglass and construction dust exposure to the occupant and occupant belongings	Protect occupant health and safety Protect occupant belongings
4.1003.10c Attic access	Equidistant holes will be drilled in a straight row parallel to the longitudinal exterior wall of the ceiling If a longitudinal ceiling trim piece exists, trim piece will be removed and holes will be drilled behind the trim Hole location and size will be placed to provide access to allow for consistent and uniform coverage of installed insulation throughout the attic assembly There will be, at a minimum, one hole between each roof truss Holes will be large enough to accommodate the chosen fill tube without damaging the ceiling material during installation If a vapor barrier Vapor barrier A material that retards the passage of water vapor and contains a perm rating of less than 1 or ceiling-mounted insulation is present, access will be gained through them Attic will be visually inspected for the location of existing insulation, obstructions, hazards, and construction type	Create access to the full attic cavity Determine insulation installation technique Prevent damage to ceiling Create a professionally finished ceiling
4.1003.10d Blowing machine set up	Blowing machine pressure test will be performed with air on full, feed off, and gate closed Hose outlet pressure will be set in accordance with manufacturer specifications	Ensure machine is capable of delivering uniform insulation density and coverage
4.1003.10e Fiberglass blown insulation installation	Insulation will be installed to a density of 1.5 to 1.6 pounds per cubic foot Using fill tube, 100% of each cavity will be filled to a consistent density Fill tube will be inserted within 6" of the end of each attic cavity Insulation will be installed into the void of the attic cavity: If existing insulation is roof-mounted, insulation will be blown below If existing insulation is ceiling-mounted, insulation will be blown above If existing insulation is mounted at both locations, insulation will be blown in between Flame spread and smoke-developed index for insulation will be a flame spread rating of 25 or less and a smoke development rating of 450 or less when tested in accordance with ASTM ASTM ASTM International, www.astm.org E84	Fill entire attic cavity to the prescribed R-value to reduce air infiltration Infiltration The uncontrolled passage of outside air into a building through unintended leaks in the building envelope Avoid clogging of the cavity and the fill tube Prevent damage to the ceiling Fire safety will be maintained
4.1003.10f Patching and sealing holes	Holes will be plugged or covered and sealed to be aesthetically pleasing If existing trim was removed, it will be reinstalled	Create an airtight seal Create a visually acceptable ceiling finish
4.1003.10g 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
4.1003.10h Onsite Documentation	A dated receipt signed by the installer will be provided that includes: Insulation type Coverage area R-value Installed thickness and minimum settled thickness Number of bags installed in accordance with manufacturer specifications	Document job completion to contract specifications Confirm amount of insulation installed Ensure ability to match bags required for total area completed Comply with 16 CFR 460.17