Roof Penetrations, Thimbles And Flashing; Unvented Insulated Roof Assembly - ENERVEX PowerStack EPSC Installation & Operating Manual

010.8030.1222 12.22

7. ROOF PENETRATIONS, THIMBLES AND FLASHING

7.1 UNVENTED INSULATED ROOF ASSEMBLY

The insulated penetration thimble, which does not include a
pipe section, is primarily for the penetration of building roofs
and walls of combustible construction. It can be installed with
a wooden frame at a minimum of 1" (25mm) clearance, see
Fig 7-2 for framing data.
1. Before installation remove the top and bottom Lateral
Support Rings from the insulated thimble.
2. The thimble mounts directly to a level combustible
structure using four 1/4 x 2 1/2" lag screws and
extends down through the roof void and into the space
below. Where the roof is not level, build a suitable
level frame construction above the roof to offer a flat
and structurally stable platform for the insulated thimble
assembly using the framing dimensions of Fig 8-2.
3. The pipe is then assembled from below and inserted
through the insulated thimble assembly.
4. Position the upper and lower Lateral Support Band around
the pipe and bolt through the hardware bracket on the
thimble with the nuts and bolts provided.
5. Position the Floor Guide around the underside of the
thimble, bolt together with the nuts and bolts provide and
secure to the ceiling using appropriate lag screws.
6. The Flat Flashing is then passed over the upper section
of pipe and position so that the flashing skirt is centrally
located over the frame.
7. The flashing is then weathered in the traditional way
depending on the type of roof.
8. Locate the Storm Collar around the pipe and loosely
tighten the hardware. Ensure that the Storm Collar is
positioned and located directly down on to the upstand of
the Flat Flashing.
9. When in position, fully tighten the hardware and apply
a bead of weather resistance sealant around the interface
between the top of the Storm Collar cone and the overlap
joint of the pipe in order to provide a suitable weather seal.
Expansion Note: There is approximately 0.2" (5mm) clearance
between the OD of the pipe and the ID of the Lateral Support
Band to allow for thermal movement of the pipe. Ensure
that there is adequate vertical expansion allowance between
the Pipe Channel Bands and the Upper and Lower Lateral
Support Bands. Where possible ensure that any joint /
Channel Band is located above the upper and lower Lateral
Support Band to prevent interference. Failure to provide
adequate allowance for expansion could seriously damage
and compromise the integrity of the product
Fig 7-1: Roof Assembly Details
A
A
Fig 7-2: Framing Dimensions
22
Chimney Cap
Storm Collar
Insulated Roof
Thimble
Flashing
Lateral Thimble
Support Ring
EPSC WALL/ROOF
CHIMNEY
PENETRATION
SIZE
FRAMING DIMENSION (A)
in (mm)
10.50
4"
(267)
11.75
5"
(298)
12.50
6"
(318)
13.63
7"
(346)
14.50
8"
(368)
16.50
10"
(419)
18.50
12"
(470)
20.38
14"
(518)