Transcript Project Status - Coastal Contractor Summit

New Water Intrusion Prevention
and Wind Resistant
Construction Techniques @
Mercedes Homes
A presentation by Stuart McDonald
Corporate Vice President of Operations
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National Housing Quality Award Winner 2007
 The history of the project
 The birth of Solid Wall Systems
 NHQ Partners and Participators
 The Prototypes-Standards & Options
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The History of Solid Wall Systems
 9 years ago, an idea was formed to build a safer, stronger, more
energy efficient homes
 Over the last 8 years PATH, Steven Winter and Associates,
FLASH, the University of Florida School of Construction and
Engineering Department, the Insurance Industry, and Applied
Research Associates have participated
 Four different wall types were experimented with which has
resulted in the Solid Wall homes we build today
 Since 2001, we have built over 4,500 Solid Wall homes in Florida
 Much of our success is due to the advent of SWS
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About Solid Wall Systems
 30-40% of all homes we build in Florida are Solid
Concrete Walls installed by our subsidiary; Solid Wall
Systems
 We invested over $3 Million Dollars in training, specialty
trucks, lifts, forms, etc. to get Solid Wall Systems off the
ground
 We are working to be more efficient with our installation
processes. Solid Wall Systems can help reduce our
build time and cost
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TYPICAL 9 Ft.
WINDOW
OPENING
HEADER
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WINDOW INSTALLATION
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Structural
Protection
Cast-in-Place Concrete
Walls Provide Superior Hurricane
Featured 6” solid concrete
walls withstand extreme
wind loads and wind-driven
‘missiles’ at 200 mph
Structural Protection Hurricane
straps are wet-set into concrete
walls at strategic locations for
more effective uplift resistance
and foolproof installation
Steel cage provides a reinforced
structure for impact load
distribution
Aluminum forms assure fast and
accurate construction with
minimal waste
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Out-swing entry doors
are more resistant to wind
loads and prevent water
intrusion that occurs when
hurricane winds force rain past
weather stripping on in-swing
doors
Wind-Driven Rain
Protection Design
Features Reduce the
Chance for Water
Intrusion
Removable hurricane
shutters protect window
openings from wind, debris,
and wind driven rain
Recessed seats in the
foundation slab for walls and
entry doors discourages rain
draining off the exterior from
entering the home
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Soffit vent openings are
limited and reconfigured to
prevent water from being driven
or sucked into eaves by wind
pressures Extended fascia design
creates a drip edge to drain water
out and away
Wind-Driven Rain
Protection Design
Features Reduce the
Chance for Water
Intrusion
Baffled roof vents make it
more difficult for rain to
penetrate into attic spaces
Continuous wall surface
drainage plane from eaves
to foundation inhibits water
from entering wall cavities
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Wind-Driven Rain
Protection
Enhanced Specifications
Control Water
Elastomeric sealant at
concrete form joints and snap tie
locations prevents water from
entering through vulnerable
areas
Secondary roof drainage
plane made of continuous self adhesive
membrane underlayment provides
continuous rainwater protection if
shingles are lost or damaged during a
storm
High performance acrylic
finish coatings prevent
exterior walls from
absorbing water during
heavy rains
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Post-Storm Recovery
Water Damage & Mold Mitigation
Water damage and mold growth become increasingly severe when power
outages prevent homes from drying out quickly following a hurricane
Natural gas generator
in each home allows for
fans and dryers to be used
in power outages, greatly
reducing risk of mold
growth and other damage
Paperless drywall
with glass mat facing
resists mold growth far
better than traditional
paper-faced products.
Mold grows particularly
quickly on paper and
other organic materials
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Energy Efficiency in Mercedes Homes
Energy modeling helped predict and optimize efficiency
Home performance testing
verified that our prototype
homes meet or exceed
ENERGY STAR® Home
standards
Our Building envelope
was improved through
tight concrete
construction and
continuous foam
insulation boards
adhered directly to
concrete walls
Mechanical systems
were carefully selected
to maximize efficiency
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Single Story
Standard, Included Features
 Out Swing Doors (Recessed)
 Recessed Foundation Wall Seat
 Color Wheel’s Flex-Lox Coating
− RCS-4 Sealant
 Lomanco Off-Ridge and Ridge Vents
 Self Adhesive Membrane applied in Roof Valley
 Soffit and 6” Fascia with 4” Sub-Facia
 Textured Cement & Paint up to Truss
 Weep Screed
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Two Story
Standard, Included Features
 Tyvek with Paper Back Lath (creates additional drainage plane)
 Horizontal and Vertical Expansion Joint with Weep Screed
 Tyvek Window Sill Flashing “Flex Wrap” and Straight Tape
 Sill Flashing or Pan for Second Floor Exterior Doors Sliding Glass
Door
 Flashing Detail for Second Floor Balcony
 Second Floor-Laundry Pan and Drain under Washer
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Optional Features
 Hurricane Shutters
 Self Adhesive Membrane Entire Roof
 Paperless, Mold Resistant Drywall
 Kohler Generator (or)
 Pre-Wire System for Generator
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Seeing
IS
Believing…
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Innovation Before the Storm
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