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A waterproof layer of thermoplastic olefin is laid down before installing the solar panels.
All vents are routed to gable walls and eaves rather than through the roof to minimize the risk of leaks and provide an uninterrupted plane for PV panels.
Apply roof underlayment over roof deck and up the sidewall over housewrap
Apply self-adhesive flashing over top edge of the wall flashing, diverter, and housewrap
Because all of the structural load is carried by the SIP roof and wall panels, no trusses are needed, allowing the home to have vaulted ceilings and open interiors throughout.
Catchment system
Chimneys and roof valleys are flashed with metal flashing that is integrated with roof shingles.
Climate-specific features include bug- and moisture-resistant concrete block construction and borate-treated interior framing; a hurricane-resistant spray-foamed hip roof; and ventless roof soffits to keep out wind-driven rain.
Downspout termination
ENERGY STAR reflective shingles cover the roof, which is ideally angled for solar panels.
Existing wall-to-lower roof transition retrofitted with a new strip of fully adhered air control transition membrane, new step flashing, new roof underlayment, and new cladding
Grade-level drainage
Gutter channel
Improper flashing can allow rain water into walls, causing significant damage
In 2009 IECC CZ 5 and higher, install self-sealing bituminous membrane or equivalent over sheathing at eaves from the edge of the roof line to > 2 ft. up roof deck from the interior plane of the exterior wall.
Install a rigid air barrier to separate the porch attic from the conditioned space.
Install gutters and downspouts that divert water away from home.
Install remaining sidewall flashing, counter flashing, and shingles
Install self-sealing bituminous membrane or equivalent at all valleys and roof deck penetrations
Install shingle starter strip then kick-out diverter; attach to roof deck but not sidewall
Install the housewrap. Cut housewrap to fit over diverter and tape top of cut
Installation of the Self-Sealing Bituminous Membrane in Relation to the Drip Edge and Roof Underlayment
Insulating sheathing is extended up to the roof rafters and sealed around the framing with spray foam as part of this exterior wall retrofit
Metal straps tie the roof rafters to the top plate for additional resistance to severe storms.
On top of the ice-and-water shield, the builder installed horizontal beams that were raised 6 inches off the deck to allow room for spray foam insulation.
Peel and Stick Membrane Applied to Roof Valley
Place first shingle and next section of sidewall flashing over upper edge of diverter
Placement of the Self-Sealing Bituminous Membrane
Power production from the Integrated solar shingles helps cut electric bills to $71 a month for this home in North Carolina.
Provide flashing and sealing integrated with the air and water control layers for vents and other roof penetrations
PV is installed on all available south-facing roof surfaces.
Raised-heel roof trusses allow more room at the eaves for attic insulation.
Raised-heel trusses increase the roof height above the eaves allowing more space for insulation above exterior wall top plates; exterior wall sheathing extends up to keep wind from soffit vents from disrupting insulation.
Right – Air barrier and penetrations sealed between porch attic and conditioned space
Right – Air barrier is installed prior to porch attic framing
Right – Air barrier is installed prior to porch attic framing
Right – House without gutters has waterproof liner, drain tile, and gravel bed extending more than 5 feet from foundation
Right – Rain barrel installed with an overflow spout terminating at least 5 feet from foundation
Right – The downspout pipe is far enough away from the foundation to prevent moisture problems
Right – The downspout terminates into a catchment system that moves water away from the foundation of the house
Right – The step flashing is the correct height above the roof deck
Right – The water-resistant barrier is layered over the step flashing to provide a complete drainage system
Right – There is a properly installed and layered self-sealing bituminous membrane at the roof penetration
Right – There is a self-sealing bituminous membrane installed at the valley of the roof prior to the roof felt
Roof penetrations are minimized to provide more space for PV panels.
Roof valley membrane protection
Saturated ground water
Sealing direct roof penetrations—final steps
Sealing direct roof penetrations—first steps
Sealing structural penetrations at roof wall intersections
Step 1. Apply roof underlayment over roof deck and up the sidewall over the rigid foam insulation
Step 2. Install shingle starter strip then kick-out diverter as first piece of step flashing.
Step 3. Place the first shingle and the next section of sidewall flashing over upper edge of diverter
Step 4. Install remaining sidewall flashing, appropriate counter flashing, and shingles