ASHRAE Journal - December 2020 - 62

COLUMN BUILDING SCIENCES

PHOTO 12 Stone Veneer. Nothing like a stone tur-

ret meeting a roof to have fun with.

FIGURE 6 Roof to Wall Connection. The water control of the roof needs to connect to the water control of the wall
and pass through the brick layer and stone layer.

Brick Veneer/Stone
Veneer
Exterior Sheathing (Plywood or Oriented
Strand Board [OSB])
Wood Stud Cavity
Airspace
Cavity Insulation
Water Control Layer
Gypsum Board
Latex Paint or Vapor
Semi-Permeable Texture
Wall Finish

PHOTO 13 Sealant Dreams. Yup, a little bit of

Weep Holes at 36 in. (900 mm) o.c.
Prefinished Metal Flashing with Drip Edge;
Overlap Minimum 2 in. (50 mm)
Metal Flashing

Roofing

sealant will do the trick. Hah! The stone has to be
removed and through wall flashing installed.

Roof Water Control Layer
Roof Sheathing
Water Control Layer
FIGURE 7 Roof to Wall Connection. Flashing detail needs to be " stepped " upward and integrated into each course
of brick. Note the end dam on each counter flashing segment.

Water Control Layer Diagonally to Cover
Joints in the Counter Flashing
End Dam

veneer wall. How do we drain the
Solder or Install
Exterior
Sealant at All
back of the brick veneer to the exteSheathing
3 in. (75 mm)
Joints
(Plywood or
Minimum Overlap
rior? In this photo we don't. The roof
Oriented Strand
flashing is only sealed to the face of the
Board [OSB])
Typical Counter
Flashing Segment
brick veneer. Happens all the time.
Some folks believe that saw cutting a " notch " (the correct term is
Counter Flashing Mechanically
" regletting " ) into the brick (Photo 10)
Fastened to Sheathing with Flathead
and inserting a " counter flashing "
Galvanized Roofing Nails at 12 in.
4 in. (100 mm)
(300 mm) o.c. Minimum Two Per
Minimum
Overlap
(Photo 11) will do the trick. No chance.
Segment
3 in. (75 mm)
Let's try the same thing with
Minimum Overlap
stone. Nothing like a stone turret
4 in. (100 mm)
meeting a roof to have fun with
Minimum Overlap
(Photo 12). Yup, a little bit of sealant
Continuous Flashing
will do the trick (Photo 13). Hah!
Roof Underlayment
The water control of the roof
needs to connect to the water control of the wall and
flashing segment in Figure 7. But this is
pass through the brick layer and stone layer. Figure 6
hard, it's not easy. That is correct. Suck
and Figure 7 show how it needs to be done. The flashing
it up and do it or stay away from brick
detail needs to be " stepped " upward and integrated into and stone. Perhaps your future should be https://bit.ly/3dTa21p
Rate this Column
each course of brick. Note the end dam on each counter
limited to siding and stucco.
62

ASHRAE JOURNAL

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D ECEM BER 2020


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ASHRAE Journal - December 2020

Table of Contents for the Digital Edition of ASHRAE Journal - December 2020

Contents
ASHRAE Journal - December 2020 - Intro
ASHRAE Journal - December 2020 - CT1
ASHRAE Journal - December 2020 - CT2
ASHRAE Journal - December 2020 - Cover1
ASHRAE Journal - December 2020 - Cover2
ASHRAE Journal - December 2020 - 1
ASHRAE Journal - December 2020 - Contents
ASHRAE Journal - December 2020 - 3
ASHRAE Journal - December 2020 - 4
ASHRAE Journal - December 2020 - 5
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ASHRAE Journal - December 2020 - Cover3
ASHRAE Journal - December 2020 - Cover4
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