HomeMy WebLinkAboutPermit Correspondence 2002-10-30
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Fiber Glass Blankets when
Installed according to the
manufacturer's recom-
mendatIOns will provide the full
rated thermal resistance value
Blanket Insulation
R Minimum
Value Thickness*
To obtain an Installed
insulation insulatIOn
resistance should
(R) of not be less than
R-38c lOX" Thick
R-38 13" Thick
i=l-30c 8X" Thick
;0 lOX" Thick
R-21 5X" Thick
R-19 611" Thlckt
R-15 3X"Thlck
R-13 3X" Thick
R-ll 311" Thick
*Thlckness may vary Check bag
label
t R-17 3 In a 511" cavity
The manufacturer recommends that the Insulation be Installed at these minimum thicknesses
and maximum coverages to provide the levels of Insulation thermal resistance (R-value) shown
(Based on 45 Ib nom mal net weight bag)
Fiber Glass Blowing Wool Attic InsulatIOn - 45 Ib Bag
R Mimmum Bags Per
Value Thickness 1000 sq. ft
To obtain an Installed The number of
insulatIOn insulation shall bags per 1000
resistance not be less sq ft of net
(R) of than area should
not be less
than
R-60
R-50
R-44
R-38
R-30
R-26
R-22
R-19
R-11
22X" Thick
20" Thick
18" Thick
16" Thick
13" Thick
111\"Thlck
9%" Thick
8X" Thick
5X" Thick
MaXimum
Net Coverage
Contents of
thiS bag should
not cover more
than
454
373
321
274
217
186
156
134
79
22 0 sq ft
26 8 SQ ft
31 1 SQ ft
36 5 SQ ft
46 2 SQ ft
53 7 SQ ft
64 2 SQ ft
748 SQ ft
1268 SQ ft
Minimum
Wt/sq. ft.
The weight
persq ft
of Installed
insulation
should not be
less than
20421bs
1 680 Ibs
1 446 Ibs
1 2331bs
09751bs
o 8381bs
0701 Ibs
o 6021bs
0355 Ibs
Net Weight/Bag Minimum 411bs. This product conforms to the performance requirements of
ASTM C764 Type I, Category 2. This product meets the Insulation Quality Standards of the
state of California.
Thickness
Coverage Area
R means resistance to heat flow. The higher the R-value. the greater the insulating power. Ask your seller for the fact sheet on R-Values.
Insulation products have been Installed In accordance with the above specifications to provide the R-values shown
Batts and Rolls
R-value
Ceilings
Walls Q - {\)C 1'50D
Floors
(2, - J!5 XI l?
I 7:7~ 0
Blowing Wool
~-val!le
<<.- "3 't\
Thickness
Iv"
Bags Used
<)1
Coverage Area
,<((;<.,-
l~ltJf)
~ ~t/1fL1 torJm~ -JAI ~/(Jl-
"
Signature (Home BUilder)
Company
Date
BIC 186 (Willows) 8/98
This home is insulated with Johns Manville Fiber Glass Building Insulation
This is Fiber Glass
Blowing Wool Insulation
FTC Fact Sheet
High Density Fiber Glass Building Insulation
Bag Weight 45 Ibs. Nominal (Minimum Net Weight of Insulation In this package is 41 Ibs.)
R
Value
Minimum
Thickness
Bags Per
1000 sq. ft.
Maximum
Net Coverage
Minimum
Wt./sq. ft.
To obtain an
insulatIOn
resIstance
(R) of
Installed
insulatIOn shall
not be less
than
The number of
bags per 1000
sq ft of net
area should
not be less
than
Contents of
thIs bag should
not cover more
than
The weIght
persq ft
of Installed
insulatIOn
should not be
less than
R-60
R-50
R-44
R-38
R-30
R-26
R-22
R-19
R-11
22Yz" Thick
20" Thick
18" Thick
16" Thick
13" Thick
11Yz" Thick
9%" Thick
8 Yz" Thick
5%" Thick
45.4
37.3
32.1
274
21 7
186
156
13.4
7.9
22.0 sq. ft
26.8 sq. ft
31.1 sq ft
36 5 sq. ft.
46.2 sq ft
53 7 sq ft.
64.2 sq ft
74.8 sq. ft.
126 8 sq ft
20421bs
1 680 Ibs.
1.446 Ibs.
1.233 Ibs.
0975 Ibs.
0.838 Ibs
0701 Ibs.
0.602Ibs.
03551bs.
Read This Before You Buy
What You Should Know About R-Values
The chart shows the R-value of this insulation. R means resistance to heat flow The higher
the R-value, the greater the Insulation power. Compare Insulation R-values before you buy
There are other factors to consider The amount of insulation you need depends mainly on the
climate you live In Also, your fuel savings from Insulation will depend upon the climate, the
type and size of your house, the amount of Insulation already In your house, and your fuel use
patterns and family size. If you buy too much Insulation, it will cost you more than what you'll
save on fuel.
To get the marked R-value, it is essential that this Insulation be installed properly with
pneumatic equipment.
JI'M
Johns Manville
BIC 186 (Willowsl 8/98
~ PRINTED ON
~ RECYCLED PAPER
Insulation Group
POBox 5108
Denver, Colorado 80217-5108
1-800-654-3103
Internet http //www Jm com