Certi-Guard™ Fire Retardand Cedar
Shakes and Shingles
If required in your area our ICBO number is: ICBO ES ER 5327
 Identification -
The CERTI-GUARD label identifies cedar shakes and shingles which have been
pressure-impregnated with fire-retardant polymers to provide permanent fire
protection. Class C shakes and shingles are identified by
their blue Certi-Guard label.
Class B shakes and shingles are identified by their red Certi-Guard label.
Class C and B labels must identify the treating
company, the independent testing laboratory,
and the building code research number.
Material - Certi-Guard
is manufactured from #1 grade Certi-Split cedar shakes,
#1 grade Certigrade cedar shingles, or #1 grade Certi-Sawn
cedar shakes.
Application - Class
C Rated Roof: Class C rated shakes or shingles
shall be placed over spaced or solid sheathing.
Class B Rated Roof:
Class B rated shakes or shingles shall be placed
over a minimum ½" solid
sheathing.
Class A Rated Roof: Class
B rated shakes shall be applied over a roof deck
assembly consisting of a minimum ½" thick water-resistant gypsum board,
applied to spaced or ½" solid sheathing. A layer of spaced or ½" solid
sheathing is then applied over the gypsum sheathing, to which the Class B shakes
are applied.
Test Standards: ASTM E-108, UL-790, NFPA-256,
UBC Standard 32-7
| Intermittent-Flame
Test |
| Class |
Flame
Temperature |
Flame
on Minutes |
Flame
Off Minutes |
Number
of Test Cycles |
| A |
1400 ± 50°F |
2 |
2 |
15 |
| B |
1400 ± 50°F |
2 |
2 |
8 |
| C |
1300 ± 50°F |
1 |
2 |
3 |
Spread-Of-Flame
Test
|
| Class |
Flame
Temperature |
Flame
Application |
| A |
1400 ± 50°F |
10 |
| B |
1400 ± 50°F |
10 |
| C |
1300 ± 50°F |
4 |
Spread-Of-Flame
Test
|
| Class |
Flame
Temperature |
Flame
Application |
| A |
1400 ± 50°F |
10 |
| B |
1400 ± 50°F |
10 |
| C |
1300 ± 50°F |
4 |
Burning
Brand Test
|
| Class |
Brand
Size |
Brand
Wood |
No.
of Brands |
| A |
12
by 12 inches
2¼" inches thick |
Douglas
Fir |
1 |
| B |
6
by 6 inches
2¼" inches thick |
Douglas
Fir |
2 |
| C |
1½" by
1½" inches
25/32 inches thick |
White
Pine |
20 |
Flying
Brand Test
|
| Class |
Flame
Temperature |
Flame
Application |
| A |
1400 ± 50°F |
10 |
| B |
1400 ± 50°F |
10 |
| C |
1300 ± 50°F |
4 |
Rain
Test
|
Class
|
Exposure
|
A,B,C
|
Twelve
one week conditioning cycles of 96 hours
of water exposure at a rate of 0.7 inches
of water per hour, followed by 72 hours
of drying time at 140°F. This
equates to 20 to 30 years of actual outdoor
rain and wear. |
| Weathering
Test* |
Class
|
Exposure
|
Test Years
|
A,B,C
|
Actual
outdoor weathering
|
1,2,3,5
and 10
|
*After the rain test and each weathering test
period, the shakes and shingles are again subjected
to the Intermittent Flame, Burning-Brand and
Flying Brand tests.
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