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Mobile Home Attic Insulation
Bill Eckman – EnergySmart Academy @ SFCC
WOULD’YA Like to take a SURVEY?
1) Who wants to Avoid MH entirely?2) Who is pushed to do MH attics?3) Can we learn it in a Conference?4) How many MHs do you do per month?
So what’s the plan Jack?
1) Ways to limit the issue2) Strategies to do it well
5 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Mobile Home Roof Retrofit
The benefits include:• Increases thermal performance• Provides heating and cooling
savings• Reduced “roof rumble”• Fairly easy to do
• Does not affect the air leakage rate as dramatically as a belly retrofit
Re-insulating roof cavities on pre-1976 mobile homes is cost-effective, according to MHEA
MOBILE HOME ROOF RETROFIT
NatGasCity 80/13 80/11 70/8Amarillo 1,060$ 1,160$ 1,440$ El Paso 960$ 1,060$ 1,360$ Brownsville 980$ 1,120$ 1,480$ Houston 860$ 960$ 1,260$ Dallas 1,040$ 1,140$ 1,440$
Mobile Home Attic Savings1000SF, 2ton AC, 80k Furnace
20yr Total Savings
PropaneCity 80/13 80/11 70/8Amarillo 1,560$ 1,640$ 2,000$ El Paso 1,220$ 1,340$ 1,680$ Brownsville 1,000$ 1,160$ 1,520$ Houston 1,000$ 1,120$ 1,420$ Dallas 1,340$ 1,440$ 1,820$
Mobile Home Attic Savings1000SF, 2ton AC, 80k Furnace
20yr Total Savings
1) How much can we add?2) HVAC Efficiency3) Duct Leakage
1) How much does it really cost?2) Adjust Setup Library accordingly
11 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Top Fill” Method
Photo courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
12 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Top Fill” – Specialized Tools & Materials
• Flexible 8-foot, 2” diameter fill tube
• High-temperature silicone caulk
• Galvanized steel roofing pieces
• Self-tapping galvanized screws
• Fiberglass mesh
• Elastomeric roof coating
Photo courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
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Mark out 4 to 5 evenly spaced holes down the roof center line. The first holes should be 6 to 8 feet from the
ends.
Insert a flexible 2-inch diameter 8-foot fill tube, fill the cavity with
insulation, and complete a 360-degree circle of coverage.
“Top Fill” - Techniques
Photos courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
14 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Bend the roof flap down and overlap the seams with a
pre-cut piece of galvanized metal roofing.
Back-caulk the patch with high-temperature silicone caulk and attach
with hex-head screws, set every 2 inches.
“Top Fill” - Techniques
Photos courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
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Cover with two coats of elastomeric roof coatingover fiberglass mesh
“Top Fill” - Finishing
Photos courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
16 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Ridge” Method
Accessing the ceiling truss cavity through the roof ridge allows the installer to insulate the entire cavity
Photos courtesy of Cal Steiner
MOBILE HOME ROOF RETROFIT
17 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Roof Coating
Image Source: http://www.koolseal.com/
Photo courtesy of PA WTC
Seal edges and seams with an elastomeric roof coating.
MOBILE HOME ROOF RETROFIT
+$400 in cooling areas with AC
18 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
• Check the integrity of the ceiling and seal all interior leaks.
• Check the general condition of roof surfaces.
• Mark out 4 to 5 evenly spaced holes down the roof center line; the first holes should be 6 to 8 feet from the ends.
• Cut 8 x 8 square holes along three sides and bend back the metal roofing flap (as shown in slide #27).
• Insert an 8-foot fill tube and fill the cavity with insulation completing a 360-degree circle of coverage.
• Bend the roof flap down and overlap the seams with a precut piece of galvanized metal roofing.
• Back caulk the patch with high-temperature silicone caulk and attach with hex-head screws set every 2 inches.
• Cover with two coats of elastomeric roof coating over fiberglass mesh.
• Seal seams and edges with the same elastomeric roof coating.
“Top Fill” Method - ReviewMOBILE HOME ROOF RETROFIT
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The “Edge Lift” Method
Photo courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
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“Edge Lift” - Specialized Tools & Materials
• Section of 12-foot long, 2” diameter gray PVC pipe
• Scrap 2 x 4 lumber
• Aluminum self-tapping ½” hex-head screws
• 1.5” roofing nails
• Lengths of aluminum mobile home gutter material
• Putty tape
• Silicone caulk
• Elastomeric roof coating
MOBILE HOME ROOF RETROFIT
23 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Remove the old gutter from the roof edge and….
…remove staples from the roof edge
“Edge Lift” – Gaining Access #1
Photo courtesy of WV GOEOPhoto courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
24 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Edge Lift” – Gaining Access #2
Photo courtesy of WV GOEO
Loosen the gable edge to lift the roof
MOBILE HOME ROOF RETROFIT
25 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Edge Lift” – Gaining Access #3
Photo courtesy of WV GOEO
Lift the roof edge to expose the roof cavity
MOBILE HOME ROOF RETROFIT
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Fill Tube Basics #1
Photo courtesy of WV GOEO
Fill tube
MOBILE HOME ROOF RETROFIT
27 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Fill Tube Basics #2
Fit the flexible insulation hose into the bell end of the fill tube…..
…..and duct tape the joint
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
28 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Fill Tube Basics #3
Cut a taper on the end of the tube to get past obstructions
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
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Open the product gate for optimal material feed
Adjust the air pressure to optimal flow
Insulation Machine Settings
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
30 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Open the roof cavity about 4” and jack up the roof edge
with scrap 2 x 4 lumber
Work the fill tube past the ridge beam…
“Edge Lift” – Techniques #1
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
31 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
…until it makes contact with the opposite wall
Pull back 4-6” and begin filling
“Edge Lift” – Techniques #2
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
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Ensure the roof will close to original position
A small work crew can fill and close up at the
same time
“Edge Lift” – Techniques #3
Photos courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
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“Edge Lift” – Techniques #4
Photo courtesy of WV GOEO
Keep hands back from the edge and wear
safety equipment.
MOBILE HOME ROOF RETROFIT
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Reinstalling the old gutter is acceptable…
…or you can install a new one
“Edge Lift” – Finishing #1
Photo courtesy of WV GOEOPhoto courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
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“Edge Lift” – Finishing #2
Apply putty tape to the back of the gutter before
fastening
Photo courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
36 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
Roof Coating
Image Source: http://www.koolseal.com/
Photo courtesy of PA WTC
Seal edges and seams with an elastomeric roof coating.
MOBILE HOME ROOF RETROFIT
37 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
• Check the integrity of the ceiling and seal all interior leaks
• Check the general condition of roof surfaces
• Select a side of the home with at least 15’ of horizontal clearance
• Erect scaffold or ladders
• Remove all screws, the roof gutter, and staples from the roof eave
• Raise and block up the roof 4 inches and insert a fill tube
• Fill - but don’t overfill - with blown insulation in each cavity
• Push the roof cap down over the siding and nail into the top plate
• Close up by applying putty tape to the backside of the original or new gutter and reinstall with new hex-head screws
• Seal roof edges and seams with elastomeric roof coating
The “Edge Lift” Method - ReviewMOBILE HOME ROOF RETROFIT
38 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Ceiling” Method #1
“Blowing from the inside!”
Photo courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
39 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Ceiling” Method #2
• Drill 2-inch holes at 16 inches on center with a hole saw bit
• Space holes 3-feet apart
• Keep holes 2-feet from the edge
• Space holes evenly
Photo courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
40 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Ceiling” Method #3
Photo courtesy of WV GOEO
Fill to resistance, but don’t dense pack!
MOBILE HOME ROOF RETROFIT
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“Ceiling” Method #4
Photo courtesy of WV GOEO
Seal holes with plastic plugs
MOBILE HOME ROOF RETROFIT
42 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
“Ceiling” Method - Review
• Cover the client’s belongings
• Check the integrity of the ceiling and seal all interior leaks
• Drill a series of holes evenly across the ceiling
• Fill the cavity
• Seal holes with plastic plugs
Photo courtesy of WV GOEO
MOBILE HOME ROOF RETROFIT
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“Gable End” Method #1
Photos courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
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“Gable End” Method #2
Photos courtesy of PA WTC
MOBILE HOME ROOF RETROFIT
45 | WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM – August 2010 eere.energy.gov
• Set up a scaffold at the end of the home
• Remove siding from the gable end
• Assemble sections of non-conductive 2” gray PVC pipe to equal the length of the home
• Push the pipe assembly into the cavity toward the other end of the home
• Fill the cavity with insulation along the entire length and width of the home
• Reinstall gable end siding
“Gable End” Method #3MOBILE HOME ROOF RETROFIT
Photos courtesy of PA WTC
»Reduce “Shadowing”»Modern tech for better install»Double-end or mixed methods
»Existing Conditions»Potential Savings»Retrofit Options (6) and Costs
Want to know More?
WxTVhttps://www.youtube.com/user/TheWXTV/videos?disable_polymer=1
Bill EckmanThe Energy$mart Academy @Santa Fe Community [email protected]