exterior

Report
Finishes many options
Walls wood shakes, shingles, board & batten (vertical), plank
lap (horizontal), T1-11 ply, vinyl, fiber cement, aluminum, stucco.&
.Brick (masonry) shown above
Roofs wood shakes, shingles, asphalt shingles, metal standing
seam or corrugated, clay or cement tile, slat, single ply at flat roof....
System to Remove water
Gutters / Roof Drains
(Leaders) or Down Spouts DS.
French drains (gravel trench) w/
Rain chains
Details
Weather
protection –
a Moisture
System
•insulation (& V.B.
*
vapor barriers)
•sheathing
•weather barriers
•Venting
•Flashing
•Cladding (finish
material)
Detail Layers-of
weather barrier
System
Vapor Barrier
Insulation
Sheathing
Moisture Barrier
Flashing
Siding
Flashing
often a soft metal
that can cover
the gap and
direct water away
from wall or roof
used at
intersections
(and/or with a
Drip edge)
1” AIR GAP
*Rain-screen*
...Air cavity keeps siding away from
wall framing allows moisture to dry
Brick veneer on
wall is a rain
screen
8
Flashing
...at window
head and at
sloped sill
[Window in section
view]
Frame
Building Section

Weather Protection System
Walls & Roof
•Insulation (w/V.B. vapor barriers)
•Sheathing (OSB - CDX ply.)
•Weather or Moisture barriers
•Venting (air space / dry moisture)
•Flashing (water away & drip edges)
•Cladding (finish material)
*
...In the
Walls
Plumbing, electrical &
Insulation (with V.B. vapor barriers)
Attic
1. Air gap for venting
b/w insulation &
sheathing
6. Roofing felt or MB
(moisture barrier)
2. & 4. Insulation (batt
or rigid)
3.Vapor barrier (on
warm side of wall or
roof)
Insulation (& V.B. vapor
barriers)
5.Drywall Finish wall
6. MB
7. Roof (shakes)
Insulation Symbol is a
Looping line for Blanket
or batt insulation
Rigid Insulation
Symbol
is criss-cross lines
Insulation Resists heat/air infiltration =
R value (the higher the # the
better)
*
Energy Code
Why are
these
numbers
highest at
roof?
R 38 at
ceiling
or
rafters
R 21 in
walls
R 30
at floor
Header with Rigid Insulation
*
energy saving
Types of Insulation Material : Batts or blankets or
blown or Rigid (at Header over door) or foam
expanding insulation
CRUSH LESS
INSUL.
Insulation location :
•
•
•
•
Attic ..most critical area (as heat rises)
Exterior walls
Floors - separating unheated from heated areas
[doors & window - insulated & with weather stripping]
•Isometric of
an exterior
wall with
CLAPBOARD
SIDING
...on the
walls
Weather protection system = enclose
Type of Siding:
noted on elevation
dwgs. Seen in
section dwg. fianl
layer
Wood Shingles or
(Shakes which are more
random because they are split
wood )
Type
of
Shiplap wood
siding
Siding:
Wood
Stucco
Shingles or
(Shakes which
are more
random
because they
are split wood )
*
Shingles
Beveled
Clapboard
siding
Or board & batten
*
energy saving
Flashing at
Roof
Stepped
overlapped
Brick Wall (Masonry)
….on CMU or on wood framing –most common
END OF LECTURE
*

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