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To increase a masonry-walled home’s resistance to seismic forces, solid wood blocking is added between the roof rafters, anchors are added to connect the brick wall to the rafters and floor joists, building diaphragms are added, foundation braced

To increase a masonry-walled home’s resistance to seismic forces, solid wood blocking is added between the roof rafters, anchors are added to connect the brick wall to the rafters and floor joists, building diaphragms are added, foundation braced
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To keep water out, flashing should be integrated with the house wrap, siding, and shingles or roof tiles.

To keep water out, flashing should be integrated with the house wrap, siding, and shingles or roof tiles.
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To reduce the risk of condensation on the interior of the roof sheathing in cold weather, the ratio of exterior (above-deck) insulation must be increased as a percent of total attic insulation as outside temperature decreases

To reduce the risk of condensation on the interior of the roof sheathing in cold weather, the ratio of exterior (above-deck) insulation must be increased as a percent of total attic insulation as outside temperature decreases
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Top view showing how the chimney is attached to at least four ceiling joists running parallel to the exterior wall.

Top view showing how the chimney is attached to at least four ceiling joists running parallel to the exterior wall.
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Top view showing how the chimney is attached to ceiling joists that run perpendicular to the exterior wall.

Top view showing how the chimney is attached to ceiling joists that run perpendicular to the exterior wall.
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Tornado, Hurricane, and Earthquake Risk Profile of 379 U.S. Urban Areas

Tornado, Hurricane, and Earthquake Risk Profile of 379 U.S. Urban Areas
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Traditional roof trusses pinch insulation where the roof meets the walls.

Traditional roof trusses pinch insulation where the roof meets the walls.
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Turn valve clockwise from vertical (aligned with piping) to horizontal (perpendicular to piping) to shut off gas

Turn valve clockwise from vertical (aligned with piping) to horizontal (perpendicular to piping) to shut off gas
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Two L-brackets or seismic snubbers are installed at each corner of the HVAC unit and a vibration isolator or spring mount is installed in each corner to anchor the unit while allowing for slight movement in an earthquake

Two L-brackets or seismic snubbers are installed at each corner of the HVAC unit and a vibration isolator or spring mount is installed in each corner to anchor the unit while allowing for slight movement in an earthquake
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Types of brackets recommended for use in securing cabinets and drawers to the wall of the home.

Types of brackets recommended for use in securing cabinets and drawers to the wall of the home.
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Typical Concrete Tile Roofs in Florida

Typical Concrete Tile Roofs in Florida
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Typical roof truss top chord bracing

Typical roof truss top chord bracing
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Underneath the roof sheathing and two exterior layers of rigid foam, the builder stapled netting to the underside of the rafters and filled the roof cavities of the unvented attic with blown-in fiberglass insulation.

Underneath the roof sheathing and two exterior layers of rigid foam, the builder stapled netting to the underside of the rafters and filled the roof cavities of the unvented attic with blown-in fiberglass insulation.
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Underwriters Laboratory label for a safe room door.

Underwriters Laboratory label for a safe room door.
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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition
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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper
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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition

Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition
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Unvented roof assembly at rake retrofitted with spray foam installed along the underside of the roof deck and extended to the rake edge to insulate and air seal the attic

Unvented roof assembly at rake retrofitted with spray foam installed along the underside of the roof deck and extended to the rake edge to insulate and air seal the attic
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Use flexible straps to secure large electronics equipment like computer monitors and microwave ovens during seismic events.

Use flexible straps to secure large electronics equipment like computer monitors and microwave ovens during seismic events.
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Use plumbers metal strapping, wood blocking, and shelving brackets to secure a water heater in a corner to prevent tipping during an earthquake.

Use plumbers metal strapping, wood blocking, and shelving brackets to secure a water heater in a corner to prevent tipping during an earthquake.
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Use strapping, wood blocking, and shelving brackets to secure a water heater to a straight wall to prevent tipping during an earthquake.

Use strapping, wood blocking, and shelving brackets to secure a water heater to a straight wall to prevent tipping during an earthquake.
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Using roof and wall materials with a high Solar Reflectance Index (SRI) will reduce heat gains.

Using roof and wall materials with a high Solar Reflectance Index (SRI) will reduce heat gains.
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Vented Attic vs Unvented Cathedral Attic Air Flow

Vented Attic vs Unvented Cathedral Attic Air Flow
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Vented crawlspace cripple wall has seismic retrofits – plywood is added on interior that fastens to extra blocking added at sill plate and connected to foundation with new anchor bolts

Vented crawlspace cripple wall has seismic retrofits – plywood is added on interior that fastens to extra blocking added at sill plate and connected to foundation with new anchor bolts