DESCRIPTION
Firestall® Roof Decking is a nailable UL Class "A" fire
rated structural roof decking. It is made of 1 to 4 plies of Homasote structural
board and a face ply of NCFR® Homasote. It is made to accommodate spans
from 16" to 48" o.c.
USES
Firestall Roof Decking is designed for use as a structural load
bearing decking in residential and commercial buildings that require a
Class A (25 flame spread) rated decking. It can be applied over either
steel or wood framing or structural steel deck and provides a nailbase
surface to attach additional insulation, shingles and other finish roofing.
Firestall® Roof Deck complies with 1993 BOCA National Building Code Section 2310.2, Fire retardant-Treated Wood.
Extended ASTM E-84 Fire Test Method, Factory Mutual Research Report J.l. 1R9Q9.AC.
SIZES, WEIGHTS AND THERMAL RESISTANCE
Thickness Nom: 1.0"
Size: 2' x 8' (23-1/8" x 95-7/8" actual)
Weight (lbs./sq. ft.): 2.62
R-Value: 2.05
Thickness Nom: 1-3/8"
Size: 2' x 8' (23-1/8" x 95-7/8" actual)
Weight (lbs./sq. ft.): 3.48
R-Value: 2.5
Thickness Nom: 1-7/8"
Size: 2' x 8' (23-1/8" x 95-7/8" actual)
Weight (lbs./sq. ft.): 4.63
R-Value: 3.1
Thickness Nom: 2-3/8"
Size: 2' x 8' (23-1/8" x 95-7/8" actual)
Weight (lbs./sq. ft.): 5.78
R-Value: 4.9
2' Edge Square
8' Edge T&G
FIRE RESISTANCE RATINGS
Method of Test: ASTM-E84
Class: A
Flame Spread: 25
Smoke Developed: 20
Firestall® Roof Decking is U.L. listed under file R-5268.
LOAD TABLE
Panel Thickness: 1"
Maximum Rafter Spacing for live loads of 50 PSF: 24"
Panel Thickness: 1-3/8"
Maximum Rafter Spacing for live loads of 50 PSF: 32"
Panel Thickness: 1-7/8"
Maximum Rafter Spacing for live loads of 50 PSF: 48"
Panel Thickness: 2-3/8"
Maximum Rafter Spacing for live loads of 50 PSF: 48"
• Load Table calculations are based on 2 or more continuous spans.
• 10 PSF dead load assumed.
TYPICAL PHYSICAL PROPERTIES
Density, lbs./ft.
440 Surface: 26-28
NCFR Surface: 34-40
Tensile Strength, PSI
440 Surface: 450-700
NCFR Surface: 400-700
Hardness, lb. (Janka Ball)
440 Surface: 230
NCFR Surface: 275
Water Absorption by vol. (Max.)
(2 hrs. immers.)
440 Surface: 5 %
NCFR Surface: 5%
(24 hrs. immers.)
440 Surface: 15%
NCFR Surface: 14%
Expansion from 50%-90%
Rel. Hum. (Max.)
440 Surface: 0.25%
NCFR Surface: 0.30%
Flame Spread (NCFR surface): Class I (or A)
Noise Reduction Coefficient: .20
ARCHITECTURAL SPECIFICATION (short form)
All structural Roof Panels shall be _____ thick Firestall Roof Decking as manufactured by the Homasote Company, West Trenton, NJ, made of a composition of Homasote structural board and a face ply of UL Class A NCFR Homasote. All panels shall be installed in accordance with current Homasote Company Instructions.
Installation Instructions
GENERAL REQUIREMENTS
Packaging, Storage and Protection Firestall® Roof Deck comes to the job site covered in weather-resistant plastic, encapsulated units. However, all materials should be stored at job site above ground on wooden pallets and covered by tarpaulins. Packaging material is not intended for exterior job site protection.
Install in a dry condition only. Follow immediately with application of roofing felt and finish roofing.
Panel ends must have a minimum of 3/4" bearing at all times.
Panels must have 1/8" expansion and contraction space (running the full thickness of the panel) between all square end joints and 3/4" space at all abutting shear and fire walls and gable ends.
For structures 150' or longer provide a 1-1/2" free expansion joint at 75' intervals. All connections at shear and fire walls and gable ends should be allowed to float 3/4".
The NCFR face ply with V groove must face down towards the interior of the structure.
FIRESTALL ROOF DECK Panels are not recommended for use over swimming pools or similar areas. NO MOISTURE FROM ANY SOURCE SHOULD BE SEALED INTO A ROOF SYSTEM. ROOFING FELTS, INSULATION OR VAPOR RETARDERS THAT BECOME WET OR WATER-LADEN DURING CONSTRUCTION SHOULD BE REMOVED AND REPLACED BEFORE THE APPLICATION OF FINISH ROOFING MATERIALS.
Do not use aluminum nails to install Roof Decking or to apply finish roofing. Do not attach aluminum flashing directly to Roof Decking.
INTERIOR FINISH
Interior face of panel is NCFR Homasote® which may be finished with quality textured latex paint or other material such as wood paneling, ceiling tile, etc.
Vapor retarders in general are based on many and varied factors. They shall or shall not be used depending on architectural or engineering evaluation of existing conditions. This determination is not the responsibility of the Homasote Company.
In areas where a vapor retarder is required it is recommended that, as panels are applied to framing, a bead of caulking be placed in the groove of each joint and along the panel ends. After roof is completed, interior surface should be painted with a vapor-retardant paint such as Glidden INSUL-AID or equal.
APPLICATION TO STEEL FRAME STRUCTURE
1. ATTACHMENT TO: Steel Bar Joists or I-Beams (Max. 1/4" Thick Flange)
A. Apply metal angle of wood nailer to steel bar joists at all eave
and rake edges.
B. Starting at low or outside edge of the roof, place the panel on
the bar joists with groove edge toward low portion of roof and tongue toward
high portion. Fasten using Olympic No. 14-10 Heavy Duty Al1 Purpose Screws
(or equal) applied 10" o.c. and back 1-1/2" from edges at each bar joist
location (3 screws per joist). To install Olympic No. 14-10 Heavy Duty
All Purpose Screws, pre-drill hole thru panel into flange of the steel
joist using 7/32" high speed drill bit. Place screw in pre-drilled hole
and draw fastener head flush with surface of panel; do not over drill.
Fasten 12" o.c. at each framing location.
C. Place subsequent panels to fit over the exposed tongue. Drive T&G
edges tightly. Place panels in straight alignment and at right angles to
framing with all butt joints falling on framing members. Butt joints must
be staggered. Leave 1/8" space between all butt joints.
D. The structural framing system shall provide adequate structural
support at the perimeter of all openings larger than 8" diameter.
E. All end joints shall be securely fastened to the joists.
F. As Firestall® Panels are installed, cover immediately with roofing
felt and finish roofing.
2. ATTACHMENT TO METAL C-JOIST
A. Apply metal angle or wood nailer to metal C joists at all eave and
rake edges.
B. Follow a, b, c, d, e, and f under "Attachment to Steel Bar Joist
or I-beams" using appropriate corrosion-resistant self-drilling fasteners
suitable for use with gauge of C-Joist. Do not pre-drill C-Joist.
APPLICATION TO WOOD FRAME STRUCTURE
A. Apply wood nailers of same thickness as Firestall Roof Deck at all eave and rake edges.
B. Starting at low or outside edge of the roof, place the panel on the rafters, tongue pointing to ridge, and nail 6" o.c. to each rafter location (5 nails per rafter). Use common galvanized nails of sufficient length to penetrate thru the Firestall Roof Deck and a minimum of 1" into wood framing. Butt ends of panels must have a minimum of 3/4" bearing on framing.
C. Place subsequent panels to fit over the exposed tongue. Drive T&G edges snugly. Place panels in straight alignment and at right angles to framing with all butt joints staggered. Leave 1/8" space between all butt joints.
D. Where openings larger than 8" in diameter occur in panels, adequate structural support must be provided for all edges.
E. All ends of panels shall be securely nailed to rafters.
F. When heavy materials or concentrated loads must be placed upon, or transported over, installed Firestall Roof Deck panels, deck planking or other suitable material shall be placed to distribute weight.
G. After Firestall Roof Deck panels are installed, cover immediately with roofing felt and finish roofing.
APPLICATION AS NAILBASE OVER A STRUCTURAL STEEL DECK
A. Apply wood nailers of the same thickness as Firestall Roof Decking to surface of decking at all eves and rake edges of roof to provide starter strips and nailer for trim and fascia.
B. Starting at low or outside edge of roof, place panels on the steel deck running perpendicular to the flutes. Make sure panel ends fall on top flange between ribs.
C. Mechanically fasten Firestall Roof Deck in place using FM approved Galvanized Roof Insulation fasteners (without plates) at a rate of 11 screws per panel. See fastening pattern below. Screws must be of sufficient length to penetrate structural deck at least 3/4". Hold screw back a minimum of 3/4" from panel edges.
D. Place subsequent panels to fit over the exposed tongue. Drive tongue and groove edges together tightly, leave 1/8" space and stagger all joints at square edge of panels. For runs over 50' leave 1/2" expansion joint. Leave 3/8" space form all wood blocking or nailers.
E. As Firestall Panels are installed cover immediately with roofing felt and finished roofing.
*NOTE: If additional insulation is required over Firestall Roof Deck, Thermasote Nailbase Roof Insulation is recommended for use under shingles or metal roofing (see Homasote Bulletin No. T-8-381-5). For single-plys and BUR systems use Homasote Commercial Roof Insulation. See Homasote Catalog No. SWT 8-290-8 for complete information.
ROOFING APPLICATION
1. ASPHALT/FIBERGLASS SHINGLES*
Apply roofing felt and asphalt/fiberglass strip shingles directly
to the Firestall Roof Deck panels. Use annular threaded galvanized roofing
nails with 3/8" diameter head, 1-1/4" long. Use Homasote Nail No. 2125
(3/8" head, 1-1/4" long, annular threaded, galvanized), Bostitch Nail No.
CR3DGAL (3/8" head, 1-1/4" long) shot with N12B Roofing Nailer, or Senco
Staple No. P178A8 (1" crown, 1-1/2" long, 5562 galvanized wire with Sencoting)
shot with the appropriate Senco stapler.
*NOTE: Homasote Company requires the use of a premium or laminated roofing shingle over Firestall Roof Deck. The shingle must have minimum of 240 lbs. per square.
2. WOOD SHINGLES OR SHAKES
For wood shingles, attach roofing felt to the Firestall Roof Deck
and apply shingles directly over the roofing paper with annular threaded,
corrosion-resistant nails of sufficient length to penetrate 1" into the
Firestall Roof Deck. Apply shingles following the procedure outlined by
the Cedar Wood Shingle Mfg. Association.
3. ROOFING TILES OR SLATE
For rigid-type, non-wood cement, clay tile, or slate shingles over
roofing felt, use corrosion-resistant annular threaded roofing nails with
3/8" diameter head and of sufficient length to assure 1" penetration into
the Firestall Roof Deck. In all cases, follow the recommendations of the
roofing materials manufacturer.
4. BUR
Apply according to BURSI standards for attachment to wood fiber
insulation.
5. SINGLE-PLY MEMBRANES
Apply to Firestall Roof Deck in accordance with single ply manufacturer’s
recommendation. Consult Homasote Company for most recent single-ply manufacturer’s
approval list.
6. METAL ROOFING
Contact Homasote Company for metal roofing application.
Any deviation from these instructions voids all warranties, including implied warranties of merchantability and fitness for a particular purpose.
Characteristics, properties or performance of materials manufactured by Homasote Company herein described are derived from data obtained under controlled test conditions. Homasote Company makes no warranties, express or implied, as to their characteristics, properties, or performance under any variations from such conditions in actual construction. These provisions may not be altered in any way by a salesperson, employee, agent, or any other representative of Homasote Company, except by a letter from an officer of Homasote. Homasote does not assume any responsibility of liability for the performance of any products other than those manufactured by Homasote. Homasote Company assumes no responsibility for the effects of structural movement.
AVAILABILITY
Homasote building products are available throughout the United States and Canada from local building material dealers. Dealers should have samples and literature describing all Homasote products. If not, write directly to Homasote Company.
SECTION 06124
FIRESTALL® ROOF DECKING
PART ONE GENERAL
1.01 SUMMARY:
A. Work included: Furnishing and installing factory fabricated and
finished roof decking.
B. Related Work: [Insert applicable sections].
1.02 REFERENCES:
A. Factory Mutual Research Corporation (FMRC), 1151 Boston-Providence
Hwy, Norwood, MA 02062, 617-762-4300, Fax: 617-762-9375.
B. Underwriters Laboratories (UL), 333 Pfingsten Road, Northbrook, IL 60062, 847-272-8800, Fax: 847-272-8129.
C. ASTM, 100 Bar Harbor Dr., West Conshohocken, PA 19428, 610-832-9500, Fax: 610-832-9555
1.03 SUBMITTALS:
A. Product Data: Provide manufacturer’s product and complete installation
data for all materials in this specification.
B. Shop drawings: Show profiles, joining method, assembly details, adjacent construction interface, and dimensions.
C. Samples: Available on request; sized to adequately represent material.
D. Contract Closeout: Submit Warranty and Manufacturer’s performance certifications [if applicable].
E. Installation Guide: The product manufacturer shall provide a written installation guide.
1.04 QUALITY ASSURANCE:
A. Fire retardant roof decking shall be CERTIFIED by the roof decking
manufacturer to meet performance design criteria according to the following
test standards: [select, if applicable]:
1. FMRC Standard for Class A (25 Flame Spread) for rated decking.
2. ASTM-E84 Test Method for Fire Resistance.
3. U.L. Listed under File No. R5268.
1.05 PRODUCT HANDLING:
A. All materials shall be delivered in the manufacturer’s original
sealed, labeled packaging.
B. Store materials in a dry, well-vented area above ground on wooden pallets and covered. The contractor shall report damaged material immediately to the delivering carrier and note such damage on the carrier’s freight bile of lading.
C. Remove protective packaging immediately prior to installation.
1.06 SUBSTITUTIONS
A. Proposals for substitution products shall be accepted only from
bidding contractors a minimum of 10 working days before bid due date. The
proposed substitution shall meet the performance and quality standards
of this specification (see section 1.04).
1.07 JOB CONDITIONS:
A. Verify that other trades are complete before installing the roof
decking.
B. Mounting surfaces shall be straight and secure; substrates shall be of proper material per roofing deck manufacturer.
C. Refer to the construction documents, shop drawings and manufacturer’s installation instructions.
D. Coordinate installation with roof membrane manufacturer’s installation instructions.
E. Observe all appropriate OSHA safety guidelines for this work.
1.08 WARRANTY/GUARANTEE:
A. Manufacturer’s Standard Warranty: Warranted materials shall be free
of defects in material and workmanship for 1 year after shipment. If, after
inspection, the manufacturer agrees that materials are defective, the manufacturer
shall at their option repair or replace them.
PART TWO PRODUCTS
2.01 MANUFACTURER:
Homasote Company
P.O. Box 7240
West Trenton, New Jersey 08628-0240
1-609-883-3300
Fax: 1-609-530-1584
Internet address - http://www.homasote.com
For local rep, contact: Sweet’s BuyLine 1-800-892-1165 (#0878)
2.02 ROOF DECKING:
A. All structural roof decking panels shall be Firestall Roof Decking
made of a composition of Homasote structural board and a face ply of UL
Class A NCFR Homasote.
B. Performance characteristics:
1. Flame Spread: Shall be Class I or A.
2. Noise Reduction Coefficient: Shall be 20.
3. Thermal R-Value: Shall be [select one or more: 2.05 for 1"; 2.5
for 1-3/8"; 3.1 for 1-7/8"; 4.9 for 2-3/8"].
4. Weight (psf: Shall be [select one or more: 2.62 for 1"; 3.48 for
1-3/8"; 4.63 for 1-7/8"; 5.78 for 2-3/8"].
C. Panel Thickness: Shall be [select one or more: 1", 1-3/8", 1-7/8" or 2-3/8"].
D. Panel Size: Shall be nominal 24" x 96" (Actual: 23-1/8" width x 95-7/8" length).
E. Maximum Rafter Spacing (For live loads of 50 psf): Shall be [select one or more: 24" o.c. for 1"; 32" o.c. for 1-3/8"; 48" o.c. for 1-7/8"; 48" for 2-3/8"].
PART THREE EXECUTION
3.01 INSPECTION:
A. Verify that the roof decking installation will not disrupt other
trades. Verify that the substrate is dry, clean and free of foreign matter.
Report and correct defects prior to any installation.
3.02 INSTALLATION OF ROOF DECKING:
A. Submit design drawings for review and approval to Architect or Specifier
before installation.
B. Installing contractor shall check as-built conditions and verify the manufacturer’s roof decking details for accuracy to fit the roof configuration. The installer shall comply with the roof decking manufacturer’s current installation guide.
homasote
COMPANY
P.O. Box 7240
West Trenton, NJ 08628-0240
1-800-257-9491
Ph: (609) 883-3300
Fax: (609) 530-1584