ASHRAE Journal - August 2021 - 33

COLUMN BUILDING SCIENCES
FIGURE 1 Wall assembly with a non-combustible cladding (brick veneer/
stone veneer), fire retardant or fire resistant continuous exterior insulation, fire
retardant or fire resistant sheathing, fire retardant framing, fire retardant or fire
resistant cavity insulation and a non-combustible interior lining.
FIGURE 2 Wall assembly with a non-combustible cladding (fiber cement siding),
fire retardant or fire resistant continuous exterior insulation, fire retardant or fire
resistant sheathing, fire retardant framing, fire retardant or fire resistant cavity
insulation and a non-combustible interior lining.
gutters such as leaves, pine needles and
branches. Embers drawn through roof
vents will ignite the combustible materials
in the attic. Homeowners, clean your
site, get rid of shrubs close to you building,
don't store trash beside your house, clean
your gutters. Duh!
Let's focus on design. Don't vent your
roof. Don't vent your walls. Drain your
roof. Drain your walls. This venting thing
is such a big deal that venting, particularly
roof venting, is often prohibited by
local jurisdictions within Urban Wildland
Interface Zones.
In terms of roof assemblies, we should
build them out of things that don't burn.
Roof assemblies are vulnerable to direct
fl ames and should be constructed with
roof coverings carrying " Class A " fi re resistance
or clad with metal roofi ng or tiles
(we were here before: " Rocks Don't Burn, "
ASHRAE Journal, May 2013).
In terms of wall assemblies, it is not
uncommon in wildfi re events that homes catch fi re via
the entry of airborne embers/cinders behind vented
cladding assemblies. If you are going to vent your cladding
make sure you have screens that prevent the entry
A U G U S T 2 0 2 1 ashrae.org ASHRAE JOURNAL
33
FIGURE 3 Building section connecting an unvented roof assembly constructed with fire resistant and fire
retardant materials to a wall assembly with similar materials.
http://www.ashrae.org

ASHRAE Journal - August 2021

Table of Contents for the Digital Edition of ASHRAE Journal - August 2021

Contents
ASHRAE Journal - August 2021 - Intro
ASHRAE Journal - August 2021 - Cover1
ASHRAE Journal - August 2021 - Cover2
ASHRAE Journal - August 2021 - 1
ASHRAE Journal - August 2021 - Contents
ASHRAE Journal - August 2021 - 3
ASHRAE Journal - August 2021 - 4
ASHRAE Journal - August 2021 - 5
ASHRAE Journal - August 2021 - 6
ASHRAE Journal - August 2021 - 7
ASHRAE Journal - August 2021 - 8
ASHRAE Journal - August 2021 - 9
ASHRAE Journal - August 2021 - 10
ASHRAE Journal - August 2021 - 11
ASHRAE Journal - August 2021 - 12
ASHRAE Journal - August 2021 - 13
ASHRAE Journal - August 2021 - 14
ASHRAE Journal - August 2021 - 15
ASHRAE Journal - August 2021 - 16
ASHRAE Journal - August 2021 - 17
ASHRAE Journal - August 2021 - 18
ASHRAE Journal - August 2021 - 19
ASHRAE Journal - August 2021 - 20
ASHRAE Journal - August 2021 - 21
ASHRAE Journal - August 2021 - 22
ASHRAE Journal - August 2021 - 23
ASHRAE Journal - August 2021 - 24
ASHRAE Journal - August 2021 - 25
ASHRAE Journal - August 2021 - 26
ASHRAE Journal - August 2021 - 27
ASHRAE Journal - August 2021 - 28
ASHRAE Journal - August 2021 - 29
ASHRAE Journal - August 2021 - 30
ASHRAE Journal - August 2021 - 31
ASHRAE Journal - August 2021 - 32
ASHRAE Journal - August 2021 - 33
ASHRAE Journal - August 2021 - 34
ASHRAE Journal - August 2021 - 35
ASHRAE Journal - August 2021 - 36
ASHRAE Journal - August 2021 - 37
ASHRAE Journal - August 2021 - 38
ASHRAE Journal - August 2021 - 39
ASHRAE Journal - August 2021 - 40
ASHRAE Journal - August 2021 - 41
ASHRAE Journal - August 2021 - 42
ASHRAE Journal - August 2021 - 43
ASHRAE Journal - August 2021 - 44
ASHRAE Journal - August 2021 - 45
ASHRAE Journal - August 2021 - 46
ASHRAE Journal - August 2021 - 47
ASHRAE Journal - August 2021 - 48
ASHRAE Journal - August 2021 - 49
ASHRAE Journal - August 2021 - 50
ASHRAE Journal - August 2021 - 51
ASHRAE Journal - August 2021 - 52
ASHRAE Journal - August 2021 - 53
ASHRAE Journal - August 2021 - 54
ASHRAE Journal - August 2021 - 55
ASHRAE Journal - August 2021 - 56
ASHRAE Journal - August 2021 - 57
ASHRAE Journal - August 2021 - 58
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ASHRAE Journal - August 2021 - 60
ASHRAE Journal - August 2021 - 61
ASHRAE Journal - August 2021 - 62
ASHRAE Journal - August 2021 - 63
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ASHRAE Journal - August 2021 - 70
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ASHRAE Journal - August 2021 - 80
ASHRAE Journal - August 2021 - Cover3
ASHRAE Journal - August 2021 - Cover4
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