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GAFGLAS" Specifications N- B- 4 -M /P6 and N -B -4 -M M
1 MHFOM,S
') fl AT wI
Moditied Base
' " ° f1 4 + ' S : 'ti}:% i ::z;,. Jr! •,"� ,, .v ,, , , ,Ri l.p �; "-,i[' - - ':; ;'i . ;. I I .$rape per oot Asphalt•T • •
LT'M S . r e4 .
,., i AL I'.I7 Y V • eie e Y� t• 1 . Y
.1'• :.•-•,,.. , {,iSmi}. 1 „`„lr. '�, ', .a ° ' �„ f . ; .,. . • r� - r - ` °�i'..; +�i I _ y ; {_ • °.,
d %"A _ ''t V0, 1:- 1.4 • .{t;- u , ). 2• `. • i.: a' •-- --
�, :,t� a i” �,, , '��,� - ,� : . :; :,' � •l1p tti; Stee AST �'T' � v lll�
�; h. •' ��, ? ,Cif . ;4 � �;' - : - . �;..; :;. : ; • � d. M - YA .
:.:d ... -1/4' . -ve: : 3 ..,8' ; . :. ' , . FtT Steep' A. STM :Tyjie IV:' , .
§ : :r : 1 eatbklifiipK r : i .. slopes rich e oot, FI ASTM Type II • • be
` , ;' 4r�;. • ;, On s! p up to Y: in' h per f at yp I may used except in
4
• .! . ., : ;'�•'1,4r r; ;I Florida, Texas, New Mexico, Arizona, and California.
, : •. P ; :�' , � :: , 1e ` Aflhi in'.w I Surfacing
i i.':4'-::: , ` ° 2 siee;l t 12' ??d " `tx i Apply GAFGLAS Mineral Surfaced Cap Sheet in accordance with the application
z c = : P. •f'' ' - • t'4 w t : k h :a � In^tr ns on page 20, so that the laps
r. 'r .4,. r , uctio t a ply 5 A 9 e laps are offset from the la of the ly sheets,
} : - :�:� � ., 9 , .. ,'. / . : -. , ti ,� Special Instructions
f ti ° `• i` t, 1. See recommendati for over s'� decks on page : � .,, , h� c ; � ��'�#.
' a � : o use ov. gypsum p e 9.
;. r '. ai .
tr , •• ,r r , , J k -;fir . ev 2. Acceptable Base Sheets include: STRATAVENTs Mailable required for freshly
• ,•,.,,er ;`„ ,v>s> I poured gypsum decks, GAFGLAS #75 Base Sheet, RUBEROID�
�� :,e ••••••• A r
'G`Aye..,= 1 6 Anus ' ` I Sheet, F exP and GAFGLAS Ply • t � l ,y - Mineral surteneo `.'` eel, G GLAS FI IyG, GL S y 4. For wood decks and structural
i ' ricq t.. rt c
13Vs , ; �t /. :; .. c N „ - _ . a s �' :` . wood fib de when F 4
r � �, _ � cks, GA GLAS P!y or GAFGLAS`FlexPly6 is used as a
. . :-.
T"�om' s �..,1 base sheef, a sheathing paper is required.
See - Nai ' p 9.
"Sri e.triie t -e I fGCi �.�* -;;Vt w "... w'• ••••i . llnq of Base Sheet, gee 1 a
e H .: ''- i v . •','i e ' ; r ".w : " "'� a :.N ' ?r ; : "i t �; r m
f : :
: y .r; {roan ;k :} g ,;'; .: :: W,.. � :.., ::y'•;, 4. For roof slopes inch foot U ore. all felts must
�r• 6f ,,�;� R, � :.F ' , ` .�•<._F loo pesofiir per or ply ets usthebacknair 4 ;,
G;'::: :::. , ,`''' ' 4 ?` - • : i . '' fir A' . : -}1, ,, .: ;`= :, - I inches in from the back edge of the felt, See "Installation on Steep Roofs; page 10. E
UL Classification • North, South, and West Zones { ?:uL•Cia ; ;'. '% Substrate - Sto _ --
a.ifabledesks up to 6 inches per foot slope except tor lightweight p y
N
exec o ghtweight insulating h.sa • .4f, :a :.•,. c, ? •' :;;.,,•
Concrete decks which art: limited to a maximum slope of 1' per foot. Wood, ' i. • < , - �'. • •2 .X
gypsum, p gypsum p acceptable _ .a •'• . ;` ; • • - :' •
plywood. -
decks. For lightweight
ood. 00 fled sum recast s planks, other naildbie - • g �a :. • .,4 .' , , ..,; ` + '� _ '..,. _ •
insulating concrete C ` 3 (a
s g •snerete decks, see pace 9. �
UL Chan Key
•
ffetertatsavy;: : :y;.. y ; . : , • ., . • •• .. I 1. Substrate
vy�.. : "''�� ' P�` � t :' �! > '4; : � ^;�`�'�. : + Y . : : {, •
one 4-, :. -i -:Y ` , ", ,.7G }; - " - 4 ;'- - � Combustible and Noncombustible
r.: � A� '� : _ : - .� :�. ; ..� ,.,., `. j C = C mh
;5ttf : pa 1 py 4 11. r, . w1 d r.Q ' '
•" •' = " r Combustible planks, r,,, plywood (min, inch lisa � , ,,, ,t l )-..
� • �v��''' • • � ! I. • : +�'r: ustible =Wood ranks, ds, et yw ood mi � in h t
,,.�Q { ,+ .. : 7 ' � i '" � . '1'Y:1.47 - ` t �� : :�'c :r .� :7 J�. : ;' - " o' • . �S` I ( n
, e•$11F;L'S' . : , c 3? :q, .. ;G . + j :,-.1,:.:''?" ` - J � ' . - ,
>; ': <= e : ..�' f• .k oriented strand board (min. ,a inch thickness)
• :GA€ tASLP :?Bee ' o ,,`,Rgc,,.. .. . ^:, : -,,T ; �., 7 w. , -; . •,,17. NC = Noncombustible only
' G IVIa • ;�, � �Dn o nq As dolt ='!''` ?,. �c�; 4 _ ; s : ,
�,: > "� : s ,.,�, � y ,� : '< fti '} I Noncombustible = Steel, poured or precast structural concrete, lightweight
t'" 'fite!pls' ,, »• t A N .. . 4 ; _ ' •. =g , / • - insulating concrete, sum, structural wood fiber, etc.
•.. e n •i w' 1 t t * } ,i. ,,, y k Est �i _ 4 t o- • s �;'. 1: ' 2 Slope
GU► f, i 1lrie �
7 1 . ed'CabSSheet i l � : !'.. g j i
' " r i:; GAF :it6.,,t',k � y i.ii.P,..: :a, ; T : r y� i %l .,`p Y� ..:.. . ..'.`"Z;i _. . - i i. — . i Maximum ?, allow
� : � ;{••' : Fs � ,•. . -`'� z ;r rt; `� + :N;i .• �' _ i S•Op ed, in inches per foot.
� i4 : , ,... , ,
.Q... l 5 2
1 pt' a Fa : • , :. ' ,:` :. :.c � ;s • ;
Specifications -
General
Design and Application Considerations detailed in this Manual shall apply in
addition to the following recommendations and specifications.
Application of Roofing Membrane
1. Oyer entire Surface, lay one ply of sheathing paper where applicable. Lap .
each sheet 2 inches over preceding sheet. Nail sufficiently to hold in place.
2. StartIng at the low point of the roof, lay one ply of Base Sheet, lapping each •
sheet 2 inches at edges and not less than 6 inches at end laps. Nail along lap
of base ply at intervals not to exceed 9 inches and stagger•nail down center Of '
shott in two rows with nails spaced at 18 inch Intervals in each row. Use fas-
teners with integral metal heads at least I inch in diameter or square that are
recommended by GAF Materials Corporation or the deck manufacturer. (See
'Special Instructions' below.)
3. Starting at the low point of the root, mop two plies of GAFGLAS Ply shingle
fashion; lapping each sheet 20 r7. inches over the preceding sheet: solidly • , .., .. . — . ...
mopping to the underlying base sheet to provide three plies over the entire x• ; , %'} ' . Guefantees A0aila610'
roof area • Specification'. ••. Llbert :
Asphalt Requirements .P1 -4 MI /P.t. ''; ; : `.'' t•15 ;¶2;10, 5 yr :�West.Zotie only; : Wood Decks:
-l Interpl y moppings of Roofino Asphalt must be applied in a continuous film and •M :g- 4-MjPS a; , .; :.'' :` 5;- 12;10; 5yt: i, ; '
shall consist of approximately 25 pounds par 100 square feet of roof area with ' i ' " -
: : ' . : • .. .•: -. ' : 7 • 'Llphlght lhsrilatfng;Conerete. (Seepage 9.)
a tolerance not to exceed 20 °o plus or minus. The appropriate asphalt for the N -8.4 M ., 12;10 5. yr: .
slopes involved must be used. , - - •
• 41