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Homasote Co.
Recycled Building Products\Roof Deck
Easy-ply Roof Decking - page 6
Recycled Building Products\Roof Deck
Thermasote® Nailbase for Supplemental Roof Insulation
THERMASOTE® is a composite of strong, asbestos-free insulating and weather- resistant HOMASOTE® structural building board plus polyisocyanurate form and a bottom surface of asphalt saturated felt, fibrous glass, or foil.
Homasote Easy-Ply® Roof Decking, used in conjunction with Thermasote® , will provide a 15-minute thermal barrier protection, following ASTM E-119 criteria (Factory Mutual Research Test Serial No. 2760) and insulation values to R32 + are possible.
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Thermasote® |
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Thickness Nom. |
Size |
Age R-Value |
2.0" |
4' x 8' |
11.1 |
3.0" |
18.2 |
The thermal value of this product was determined in accordance with the TAMA conditioning procedure as outlined in PIMA Tech. Bulletin 101.
NAILING
a. |
Apply wood nailers of same thickness as THERMASOTE® to all eave and rake edges of roof as starter strip and nailing for trim and fascia. |
b. |
Cover all roof decking with felt paper prior to application of Thermasote. |
c. |
Starting at the low or outside edge of the roof, place the panel on the deck and nail 6" o.c. at the panel edges and 12" through the field with HOMASOTE NAIL (3/8" Head, Annular Thread) of sufficient length to penetrate 1" into the deck (See Nail Chart). Stagger all panels. |
d. |
Place the next panel lightly abutting previous panel. |
As THERMASOTE® is applied follow immediately with application of required felt paper and finish roofing. |
ROOFING APPLICATION *
1. |
Asphalt/Fiberglass Shingles-Apply roofing felt and asphalt/ fiberglass strip shingles directly to the THERMASOTE® panels. 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. P17BAB (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 ROOF DECK and THERMASOTE®. The shingle must have a minimum weight of 240 lbs per square. |
2. |
Wood Shingles or Shakes - For wood shingles, attach roofing felt to the THERMASOTE® and apply shingle directly over the roofing paper with annular threaded, corrosion-resistant nails of sufficient length to penetrate 1" into the THERMASOTE®. 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 THERMASOTE.® 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 THERMASOTE® in accordance with single-ply manufacturer's recommendation. Consult Homasote Company for most recent single-ply manufacturers approval list. |
6. |
Metal Roofing - Contact Homasote Company for metal roofing application recommendations. |
*If supplemental insulation is not desired, felt and finish roofing may be applied directly to Roof Decking.
NAILS FOR THERMASOTE® APPLICATION |
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THICKNESS |
NAIL NO. |
REQ'D./100 S.F. |
2.0 |
2350 |
2.3 lbs. |
2.5 |
2350 |
2.3 lbs. |
3.0 |
2450 |
3.3 lbs. |
4.0 |
2500 |
7.4 lbs. |
3.0 |
2400** |
2.7 lbs. |
BONDED BUILT-UP ROOFING APPLICATION
Homasote Roof Deckings, as described above, are acceptable surfaces for Built- Up Roofing when the following requirements are met:
1. |
Slope of roof must be not less than 1/4" per foot nor more than 3" per foot. |
2. |
Free drainage must be provided at all points. |
3. |
Wood nailers of same thickness as decking and at least 3-1/2" wide must be provided at all edges and around all openings cut in the decking. Top of nailers must be flush with top of Homasote Roof Decking and fastened securely to wood framing. |
Built-Up roofing is applied directly to the top surface of Homasote Roof Decking using nailable method. First two courses of paper are applied with "Square-Head" nails or Homasote Nail 2125 with tin caps. Follow roofing material manufacturer's directions.
Application of built-up roofing materials must be in accordance with manufacturer's specifications and any other requirements he may establish.
Caution: |
AVAILABILITY
Homasote products, samples and technical literature are available throughout the United States, and Canada. Contact your local building material dealer, roofing distributor, or write to Homasote Company, P.O. Box 7240, West Trenton, NJ 08628-0240.
P.O. Box 7240,
West Trenton, New Jersey 08628-0240
PH. #609-883-3300
Fax #609-530-1584