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.
|
Thermasote® |
|
Thickness
Nom. |
Size
Nom. |
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 |
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:
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. |
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
