ASHRAE Journal - August 2020 - 58
COLUMN BUILDING SCIENCES
I played around with
FIGURE 2 Wood Crawlspace Foundation. All the details are pretty much the same as with the wood basement foundation details.
But if you want to do away with the concrete footing, I think you can. Just remember "point loads."
panelizing the wood
basement foundations,
including panelized
basement wood floor
slabs (Photo 5, Photo 6 and
Photo 7). Let me tell you
about this panelization
thing-great for the structure, terrible for the water
proofing and air control.
I tried everything-twostage joints, gaskets. So
my advice for you youngsters today: if you want to
panelize the wall framing
and the floor slabs, go
ahead. But do not incorporate the water proofing, continuous exterior
insulation and air control
in the panels themselves.
Add the water proofing and air control with fully
PHOTO 9 Wood-Slab-On-Grade Foundation. Start with a gravel pad. Lay out your
adhered membranes over the exterior of the panels
membrane water control layer, air control layer and vapor control layer; lay out
your perimeter wood footing and lay down your continuous rigid insulation. Note
and go over everything with the continuous exterior
the concrete "pad" that provides support for a "point load."
draining insulation.
My best current recommendation is to use concrete
footings, lay down the rigid insulation under the wood
basement floor slab, run a fully adhered membrane over
the top of everything including out over the perimeter
footings. Then frame the wood basement floor-or use
panels. Then frame the exterior walls-or use panels.
Then install the fully adhered membrane and continuous exterior draining insulation on the exterior
(Figure 1).
Note how the main floor is framed below the top
of the perimeter wall to handle the "back-fill" load
(Photo 8). Similar approach with the wood basement
floor. Back in the day we did not have cellular PVC
boards available to act as protection for the above grade
On to crawlspaces. Much easier, especially if the inteportion of the continuous exterior draining insulation. rior grade of the crawlspace is higher than the exterior
Today-yeah!
grade. Note that I am a conditioned crawlspace kind of
You need to assume that you will have insects wanting to guy. If you go that approach, the crawlspace is a "miniinvade. You do not want the continuous exterior draining basement." All the details are pretty much the same as
insulation to act as an "insect interstate." Note the fully
with the wood basement foundation details. But if you
adhered membrane layers acting as insect protection.
want to do away with the concrete footing, I think you
Also, do not forget about air control layer continuity.
can (Figure 2). Just remember "point loads." Wherever
58
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ASHRAE Journal - August 2020
Table of Contents for the Digital Edition of ASHRAE Journal - August 2020
Contents
ASHRAE Journal - August 2020 - Intro
ASHRAE Journal - August 2020 - Cover1
ASHRAE Journal - August 2020 - Cover2
ASHRAE Journal - August 2020 - 1
ASHRAE Journal - August 2020 - Contents
ASHRAE Journal - August 2020 - 3
ASHRAE Journal - August 2020 - 4
ASHRAE Journal - August 2020 - 5
ASHRAE Journal - August 2020 - 6
ASHRAE Journal - August 2020 - 7
ASHRAE Journal - August 2020 - 8
ASHRAE Journal - August 2020 - 9
ASHRAE Journal - August 2020 - 10
ASHRAE Journal - August 2020 - 11
ASHRAE Journal - August 2020 - 12
ASHRAE Journal - August 2020 - 13
ASHRAE Journal - August 2020 - 14
ASHRAE Journal - August 2020 - 15
ASHRAE Journal - August 2020 - 16
ASHRAE Journal - August 2020 - 17
ASHRAE Journal - August 2020 - 18
ASHRAE Journal - August 2020 - 19
ASHRAE Journal - August 2020 - 20
ASHRAE Journal - August 2020 - 21
ASHRAE Journal - August 2020 - 22
ASHRAE Journal - August 2020 - 23
ASHRAE Journal - August 2020 - 24
ASHRAE Journal - August 2020 - 25
ASHRAE Journal - August 2020 - 26
ASHRAE Journal - August 2020 - 27
ASHRAE Journal - August 2020 - 28
ASHRAE Journal - August 2020 - 29
ASHRAE Journal - August 2020 - 30
ASHRAE Journal - August 2020 - 31
ASHRAE Journal - August 2020 - 32
ASHRAE Journal - August 2020 - 33
ASHRAE Journal - August 2020 - 34
ASHRAE Journal - August 2020 - 35
ASHRAE Journal - August 2020 - 36
ASHRAE Journal - August 2020 - 37
ASHRAE Journal - August 2020 - 38
ASHRAE Journal - August 2020 - 39
ASHRAE Journal - August 2020 - 40
ASHRAE Journal - August 2020 - 41
ASHRAE Journal - August 2020 - 42
ASHRAE Journal - August 2020 - 43
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ASHRAE Journal - August 2020 - 46
ASHRAE Journal - August 2020 - 47
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ASHRAE Journal - August 2020 - 51
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ASHRAE Journal - August 2020 - 53
ASHRAE Journal - August 2020 - 54
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ASHRAE Journal - August 2020 - 56
ASHRAE Journal - August 2020 - 57
ASHRAE Journal - August 2020 - 58
ASHRAE Journal - August 2020 - 59
ASHRAE Journal - August 2020 - 60
ASHRAE Journal - August 2020 - 61
ASHRAE Journal - August 2020 - 62
ASHRAE Journal - August 2020 - 63
ASHRAE Journal - August 2020 - 64
ASHRAE Journal - August 2020 - 65
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ASHRAE Journal - August 2020 - 67
ASHRAE Journal - August 2020 - 68
ASHRAE Journal - August 2020 - 69
ASHRAE Journal - August 2020 - 70
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ASHRAE Journal - August 2020 - Cover3
ASHRAE Journal - August 2020 - Cover4
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