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FM APPROVAL GUIDE

Roof Cover: Fields F56 GlasPly 4, Fields F54 GlasPly 6, Fields F52 GlasBase, Fields F58 GlasCap
Substrate: Steel, Wood, Concrete, Gypsum (recover)
Coating: See below
Application: Adhered with hot asphalt
Hail Rating: Class 1-SH
ASTM E 108: Noncombustible deck ratings are Approved as follows:
Class A at 2 in 12 slope – HAI-X25-MC, HAI-X35-MC, HAI-X45-MC, min 2 ply BUR with a cap sheet
Class A at 2 in 12 slope – HAW-315-MC, HAW-325-MC, HAW-335-MC, HAL-315-MC, HAL-325-MC, HAL-335-MC, min 2 ply BUR with a cap sheet
Class B at 3 in 12 slope – HAI-X25-MC, HAI-X35-MC, HAI-X45-MC, HAW-315-MC, HAW-325-MC, HAW-335-MC min 2 ply BUR with a cap sheet
Class A at 3 in 12 slope – HAI-X25-MC, HAI-X35-MC, HAI-X35-MC min 3 ply BUR covered with 38 in. (9.5 mm) gravel applied at 400 lb/sq (20 kg/m2) or slag applied at 300 lb/sq (14.6 kg/m2) adhered with flood coat top surface of hot asphalt applied at 60 lb/sq (2.9 kg/m2)
Class A at 112 in 12 slope – HAI-X35-RM OR HAI-X45-RM min 3 ply BUR covered with 38 in. (9.5 mm) gravel applied at 400 lb/sq (20 kg/m2) or slag applied at 300 lb/sq (14.6 kg/m2) adhered with flood coat top surface of hot asphalt applied at 60 lb/sq (2.9 kg/m2)
Class B at 3 in 12 slope – HAW-325-RM, HAW-335-RM HAL-325-RM OR HAL-335-RM min 3 ply BUR covered with 38 in. (9.5 mm) gravel applied at 400 lb/sq (19.5 kg/m2) or slag applied at 300 lb/sq (14.6 kg/m2) adhered with flood coat top surface of hot asphalt applied at 60 lb/sq (2.9 kg/m2).
Class C at 1 in 12 slope – HAI-X35-RC, HAI-X45-RC HAI-X55-RC min 3 ply BUR covered with a full mop of hot asphalt
ASTM E 108 combustible deck ratings as follows:
Class A at 3 in 12 slope – HAI-X35-RM, HAI-X45-RM, min 3 ply BUR covered with 38 in. (9.5 mm) gravel applied at 400 lb/sq (20 kg/m2) or slag applied at 300 lb/sq (14.6 kg/m2) adhered with hot asphalt applied at 60 lb/sq (2.9 kg/m2)
Class A at 112 in 12 slope – HAI-X25-MC HAI-X35-MC, min 2 ply BUR covered with a cap sheet

Construction #1: Insulation is secured to the deck per Built Up Roof cover insulation/fastener tables. 3, 4 or 5 ply BUR roof covers are constructed with hot asphalt at 18-28 lb/sq (0.9-1.4 kg/m2). The covering is a multilayer construction of Fields F56 GlasPly 4 Fields F54 GlasPly 6 used as a 3, 4 or 5 (5 ply BUR system only approved over concrete decks) ply assembly. Each layer is adhered to the preceding layer or insulation by hot asphalt. The use of Fields F52 GlasBase base sheet and/or Fields F58 GlasCap cap sheet is optional. MeetsClass 1-60/1-90 per insulation/fastener table.


Construction #2: Insulation is secured to the deck per Built Up Roof cover insulation/fastener tables. Manufacturers specification numbers:HAI-X25-MC HAI-X35-MC HAI-X45-MC, HAI-X35-RM HAI-X45-RM HAI-X55-RM, HAI-X35-RC (hot asphalt surfacing only), HAI-X45-RC (hot asphalt surfacing only). 3, 4 or 5 (5 ply BUR system only approved over concrete decks) ply BUR roof covers are constructed as in Construction #1. Base sheet may be adhered with 12 in. (305 mm) dia. spots 24 in. (610 mm) o.c. Meets Class 1-60/1-90 per
insulation/fastener table.


Construction #3: Concrete. Multilayer Insulation. Deck is primed and covered with a polyisocyanurate insulation as shown in the table under Construction #1 or min 12 in. (13 mm) thick Retro-Fit or min 34 in. (19 mm) thick Fesco, Base Cap or Fiber Glass Roof Insulation is adhered with hot asphalt at 30 lb/sq (1.5 kg/m2). Apply 3, 4 or 5 ply BUR per Construction #1 or #2. Meets Class 1-90.


Construction #4: Concrete. Deck is primed and covered with one or more layers of Fesco, ENRGY 2, Fesco Foam, DuraBoard, Fiber Glass or Base Cap (as shown in Construction #3) are adhered to the deck with hot asphalt at 30-35 lb/sq (1.5-1.7 kg/m2). Apply 3, 4 or 5 ply BUR per Construction #1 or #2. Meets Class 1-90.


Construction #5: Concrete. Min 1.4 in. (35 mm) ENRGY 2, min 1.5 in. (38 mm) Fesco Foam or DuraBoard, or min 34 in. (19 mm) Fesco secured to deck per Built-Up Roof Cover Insulation/Fastener table. Optional min 1.4 in. (35 mm) ENRGY 2, min 1.5 in. (38 mm) Fesco Foam or DuraBoard, min 34 in. (19 mm) Fesco or 12 in. (13 mm) Retro-Fit Board, GAFTEMP Permalite Recover, Permalite Recover Board adhered in hot asphalt at 25 lb/sq (1.2 kg/m2). Apply BUR per Construction #1. Meets Class 1-60/1-90 per insulation/fastener table for bottom layer insulation.


Construction #6: Steel, Concrete. Min 1.4 in. (35 mm) ENRGY 2 (not with ENRGY 2 coverboard on steel deck), min 1.5 in. (38 mm) Fesco Foam or DuraBoard, or min 34 in. (19 mm) Fesco loose laid on the deck Min 1.4 in. (35 mm) ENRGY 2, min 1.5 in. (38 mm) Fesco Foam or DuraBoard, min 34 in. (19 mm) Fesco is placed with all joints staggered and mechanically fastened through bottom layer per Built-Up Roof Cover Insulation tables. Apply BUR per Construction #1. Meets Class 1-90/1-60 per insulation/fastener table for top layer.


Construction #6a: Concrete. Same as Construction #6 except 3, 4 or 5 ply BUR felt applied. Meets Class 1-60/1-90 per insulation/fastener table for bottom layer insulation.


Construction #7: Steel. FM Approved 18, 20 or 22 ga. (MSG) (0.0474, 0.0358 or 0.0295 in. [1.2, 0.9 or 0.7 mm]) steel deck placed over 0.25 in. (6 mm) thick structural steel supports having max 6 ft (1.8 m) o.c. span. The deck is anchored to the min 0.25 in. (6 mm) thick steel supports with ITW Buildex Teks 4 or Teks 5 fasteners spaced max 6 in. (152 mm) o.c. at the supports. The deck side laps shall be secured with ITW Buildex Teks 1 fastener spaced max 30 in. (762 mm) o.c.
Min 2 in. (51 mm) thick ENRGY 2 roof insulation mechanically secured to the deck with UltraFast fasteners and metal plates applied at 1.45 sq/ft (0.1 m2) max contributory area per fastener and plate (22 fasteners and plates per 4 x 8 ft (1.2 x 2.4 m) board). Retro-Fit board, GAFTEMP Permalite Recover, Permalite Recover Board adhered to the mechanically fastened insulation with a fully mopping of hot asphalt at approximate 20-25 lb/sq (1-1.2 kg/m2). Four-ply roof cover adhered to Retro-Fit by a fully mopping of hot asphalt. Meets Class 1-150.

Construction #8: Steel. Min 58 in. (16 mm) Dens Deck or 1 in. (25 mm) Fesco board mechanically fastened to the deck per Built-Up Roof Cover Insulation/Fastener tables. Two-ply vapor retarder of Fields F56 GlasPly 4 adhered to Dens Deck by a full mopping of hot asphalt. Min 1.8 in. (46 mm) thick ENRGY 2 or 2.0 in. (51 mm) Fiber Glass adhered to the vapor retarder by a full mopping of asphalt. Min 12 in. (13 mm) Retrofit adhered by a full mopping of hot asphalt. Max 4 ply hot asphalt applied built-up roof cover. Meets Class 1-60/1-90 per insulation/fastener table for bottom layer insulation.

   

Fields Company LLC
2240 Taylor Way,
Tacoma WA 98421

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800-627-4098
Fax:
253-383-2181
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