DuraVent DuraStack Installation - Manual (Page 17)

NOTE:.DIAGRAMS.&.ILLUSTRATIONS.ARE.NOT.TO.SCALE.
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SECTION D - ROOF AND WALL PENETRATIONS
ROOF/FLOOR PENETRATION
1.. The.roof/floor.penetration.consist.of.a.firestop.radiant.shield.(FS),.a.
flashing.(F).with.a.storm.collar.(SC).and.a.floor.guide.(FG).or.ventilated.
anchor.plate.(APV).(see.Figure 36.roof/floor.penetration).
2...Those.components.allows.the.chimney.to.penetrate.a.combustible.roof.
or.floor.at.2.inches.clearance.to.combustible...See table 3.–.Minimum.
openings.for.framing.dimension.
3...The.radiant.shield.of.the.firestop.may.need.to.be.trimmed.to.fit.the.
height.of.the.roof...Nominal.height.is.10.inches.
4...Roof/floor.penetration.components.are.designed.to.be.installed.on.a.
flat.roof...They.may.be.installed.on.a.pitch.roof.if.a.curb.is.installed.
to.provide.a.flat.surface.
5...Floor.guide.is.used.to.protect.the.flashing.from.lateral.movement...The.
ventilated.anchor.plate.is.used.to.protect.the.flashing.and.to.provide.
a.re-support.
6.. Do.not.install.a.chimney.joint.or.a.expansion.length.in.the.roof/floor.
space.
7.. For.installation.on.non-combustibles.materials,.the.minimum.opening.
can.be.reduced.to.I.D...+.6.inches...The.anchor.plate.can.also.be.used.
instead.of.the.ventilated.version.
8.. Always.seal,.with.outer.joint.sealant,.between.storm.collar.and.outer.
chimney.casing.
9..Installation.step:
a..Cut.opening.to.dimensions.specify.in.table 3.
b..Install.the.Firestop.under.the.roof/floor.and.attach.it.with.screw.
c..Slide.DIS./.DAS.chimney.trough.the.firestop.
d..Install.the.floor.guide.or.the.ventilated.anchor.plate.on.top.of.the.
roof/floor.
e..Install. flashing. over. the. chimney. and. the. guide/support. and.
screw.it.
f.. The.storm.collar.is.placed.around.the.chimney.and.sealed.to.the.
casing.with.outer.joint.sealant..The.storm.collar.should.not.quite.
rest.on.the.flashing.when.the.chimney.is.cold.(1/4”.gap.between.
the.collar.and.the.top.of.the.flashing).
WALL PENETRATION
1...This.part.is.used.to.allow.model.DIS./.DAS.chimney.to.pass.trough.a.
wall.made.of.combustible.construction..
. NOTE: Crossing a combustible wall is not permitted for diameters
larger than 10” inside diameter.
2.. The.wall.penetrator.(FSW).consist.of.a.firestop.female.half.and.a.male.
half.that.slide.in.each.other.to.adjust.wall.thickness.from.7.8”.to.12.1”,.
see.Figure 37.
3...Installation.step:
a..Cut.opening.to.dimension.indicated.in.table 3.
b..Slide.the.firestop.female.half.into.the.opening.and.fix.it.to.the.
wall.with.screws.
c..On.the.other.side.of.the.wall,.slide.the.male.half.into.the.opening.
and.fix.it.
d..Insert.the.chimney.trough.the.opening.of.the.wall.firestop...Make.
sure.there.is.no.chimney.joint.or.expansion.length.in.the.wall.
opening.
e..The. chimney. section. must. be. well. supported. and. guided. to.
prevent.any.load.on.the.wall.firestop.
Figure 37 - Wall firestop
Firestop
female half
Chimney
length
Firestop
Male half
Figure 36 - Roof / floor penetration
Storm Collar (SC)
Floor guide or
ventilated anchor
plate
No joint or expansion
length in this area
Firestop radiant shield
Sealant
Flashing
2” Clearances (DIS)
4” Clearances (DAS)
Combustible
roof / floor