Showing results 1 - 75 of 75
Image
Image
A raised wood pier foundation can raise the subfloor above the design flood elevation.
Image
Building siding extended down and over the breakaway wall so the upper wall was damaged when the lower wall broke away.
Image
Buildings damaged by a hurricane storm surge: upper homes on gulf shoreline were hit by large waves above the lowest floor, lower left home on bay and right school 1.3 miles from gulf shoreline were hit by surge and small waves.
Image
Built-up beam connections, knee brace connections, and diagonal brace connections for wood piles.
Image
Closed-cell spray foam insulates the floor above a vented crawlspace; a protection board made of fiber cement is screwed in place under the floor joists to keep out pests
Image
Closed-cell spray foam insulates the floor above an open foundation; a protection board made of fiber cement is screwed in place under the floor joists to keep out pests
Image
Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE and to add a second story.
Image
Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE.
Image
Comparison of a building that sits below the Design Flood Elevation and renovated to be above the DFE.
Image
Concrete pier foundations can be used in place of wood piles in coastal areas where risk of erosion and scour is low.
Image
Connecting hardware helps tie the roof to the walls to ensure a continuous load path to improve a building’s resistance to high winds, floods, and earthquakes.
Image
Connecting hardware helps tie the walls to the top plates and rim joists to ensure a continuous load path to improve a building’s resistance to high winds, floods, and earthquakes.
Image
Image
Image
For homes built in V Zones a registered professional engineer or architect must certify that the lowest floor elevation is above the BFE and piles and structure are anchored to resist flotation, collapse, or lateral movement due to combined wind and water
Image
For homes built on an open foundation, provide a continuous air barrier by sealing all joints between the rigid insulation, floor support beams, rim joist, and bottom wall plate
Image
Image
Image
Fuel tank is elevated above flood waters on a base of structural fill and anchored to the concrete pad
Image
Green Coast Enterprises built this New Orleans home on piers so that the floor is 1 foot above the base flood level; borate treated framing and closed-cell spray foam insulation add to the home's moisture resistance.
Image
Image
In Coastal A Zones and V Zones best practice is to construct the home so the bottom support of the lowest floor is above the 100-year wave crest elevation.
Image
In high wind areas, provide lateral support to masonry end walls to resist high winds.
Image
In high-wind regions, special hardware is used for most framing connections; toe-nailing is not acceptable.
Image
Image
Image
New Charleston, SC home's first level used as parking, storage, and access space
Image
Image
Properly reinforce masonry walls in coastal locations to resist high winds and waves.
Image
Provide a continuous air barrier from the rigid foam below the crawlspace floor joists to the rim joist to the exterior wall above
Image
Raised-slab CMU foundation including flood-resistant features: sloped grade, damp proofed stem wall, capillary break under the slab (gravel or sand), vapor barrier under the slab and capillary break at the top of the foundation wall (polyethylene sheet)
Image
Recommended construction for homes in Zone B (areas of moderate flood hazard between the 100-yr and 500-yr flood) and Zones C and X (areas of minimal flood hazard above the 500-yr flood).
Image
Recommended installation techniques for electrical and plumbing lines and other utility components in homes built on piers above the base flood elevation.
Image
Image
Repair leaks and cracks, and cover holes in foundation floors and walls to minimize water and vapor entry.
Image
Right - Flood resistant slab and crawlspace foundations elevate the floor above the design flood elevation.
Image
Right – Air vents near the top of the crawlspace wall are not used as flood vents, and flood vents are installed close to grade
Image
Image
Right – Interior grade is elevated and flood vents are located slightly above interior grade
Image
Right – Notch cut into pile takes less than 50% of cross section, cut is treated with wood preservative, and beam is installed with corrosion-resistant bolts.
Image
Right – The floor and wall system on this open-foundation home use rigid foam rather than fibrous cavity insulation to reduce risk of water damage.
Image
Right – The latticework between columns in this raised foundation will allow free flow of water in the event of a flood
Image
Right – The raised-slab, brick-and-block stem wall, above-grade walls, and roof of this house use flood damage-resistant materials, integrated water, vapor, and air control layers, and construction methods which promote good drainage and rapid drying
Image
Right – The raised-slab, CMU block stem wall, above-grade walls, and roof of this house use flood damage-resistant materials, integrated water, vapor, and air control layers, and construction methods which promote good drainage and rapid drying
Image
Right – The raised-slab, poured-concrete stem wall, above-grade walls, and roof of this house use flood damage-resistant materials, integrated water, vapor, and air control layers, and construction methods which promote good drainage and rapid drying
Image
Right – This column foundation has no HVAC equipment, piping, electrical components, or structural walls below the elevated floor system
Image
Right – This floor system on a column foundation is insulated using closed-cell spray foam rather than fibrous insulation
Image
Image
Right-Flood resistant foundation walls lift the floor framing above the DFE and include flood openings to let flood waters pass through.
Image
Rigid foam provides the code-required insulation values for this floor and wall assembly so that fibrous cavity insulation can be avoided, reducing risk of floodwater damage
Image
Image
Image
The components of a framed wall include from inside to out: gypsum, wood studs, OSB or plywood sheathing, and siding.
Image
The elevated concrete floor over this concrete column foundation uses rigid foam on its interior surface to reduce thermal bridging and risk of floodwater damage
Image
The rails on these stairs were enclosed with siding, presenting a greater obstacle to the flow of flood water and contributing to the flood damage shown here.
Image
This breakaway wall design made of decay resistant lumber is compliant with the National Flood Insurance Program.
Image
This concrete block foundation cracked due to lack of steel rebar reinforcement.
Image
This home constructed in a V Zone in Bolivar Peninsula, Texas, had the bottom beam of the lowest floor at the BFE (dashed line) but the estimated wave crest during Hurricane Ike was 3 to 4 feet higher (solid line).
Image
This home was elevated above the Design Flood Elevation and the pre-existing first story became the second story.
Image
This left-to-right sequence shows the method of wall extension to flood-proof a masonry house on a slab foundation. Here the new, raised floor is wood-framed over a wet-floodproofed crawlspace, but using fill to create a new raised slab is also an option.
Image
Image
This raised-slab CMU and brick foundation includes flood-resistant features such as a sloped grade, capillary break under the slab (gravel or sand), vapor barrier under the slab (polyethylene sheet), and capillary break at the top of the foundation wall
Image
This raised-slab poured concrete foundation includes flood-resistant features such as a sloped grade, capillary break under the slab (gravel or sand), vapor retarder under the slab (rigid insulation), and capillary break at the top of the foundation wall
Image
To control surface water, the land should slope away from the building on all sides
Image
Image
Wrong - In floodplains, the interior grade elevation should be equal to or higher than the exterior grade as shown on right.
Image
Wrong - The pile foundation of this home nearly collapsed from coastal storm surges because the piles were not embedded deeply enough in the ground.
Image
Image
Wrong – Piers set on individual footings with inadequate anchoring to the ground were twisted and toppled by a coastal storm surge, while those anchored in the concrete pad stayed upright.
Image
Wrong – The footers of this house were not deeper than the depth of scour during a flood, causing undermining of the foundation
Image
Wrong – The ridge flashing fasteners were placed too far apart and came loose in high winds.
Image
Wrong – This standard air vent has become blocked by flood debris and is located at the top of the foundation wall; it should not be used as a flood vent
Image
Wrong-The home was pulled off its masonry pier foundation during a coastal flood due to inadequate pier-to-beam connections.
Image
Wrong-These masonry pier foundations were twisted and displaced by coastal storm surges in Long Beach, Mississippi.