Showing results 1 - 74 of 74
Image
A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.
Image
A concrete slab-on-grade foundation with exterior insulation, which can be elevated above the local grade as a flood-prevention strategy.
Image
Image
A vapor barrier was installed on the floor of this crawlspace and extended up the walls then the foundation walls were covered with rigid foam.
Image
An exhaust fan pulls damp air out of a retrofitted sealed crawlspace while drawing in dry air from the living space
Image
Image
Basic foundation types: deep basement, submerged crawl space, flush crawl space, and slab-on-grade
Image
Because the above-grade potions of the wall lack exterior insulation, condensation and even ice form during cold winter conditions
Image
Before sealing and insulating the crawlspace, the windows were sealed, the window wells backfilled, and sumps pumps were installed that discharged to the gutter downspouts
Image
Braced cripple wall construction in crawlspace anchored to framing and foundation
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
Comprehensive above-grade water management details for a crawlspace foundation include a capillary break over the crawlspace floor, slope the surface grade away, installing gutters that slope away, and capillary break under sill plate.
Image
Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
Image
Image
Image
Image
Image
Image
Image
Image
Image
Image
Crawl space interior insulation with EPS or XPS semi-permeable insulation on inside wall
Image
Image
Image
Exterior XPS basement insulation is correctly installed to completely cover the foundation wall
Image
Foil-faced rigid foam and spray foam can be used to insulate a basement on the interior; use good moisture management techniques to keep the basement dry
Image
For seismic resistance in basement, crawlspace, and crawlspace “cripple” wall foundations, connect the plywood or OSB sheathing to the wall framing, rim joist, and sill plate and anchor bolt the sill plate to the foundation
Image
For seismic retrofit of crawlspace with posts and piers, add cross bracing to posts; add cross bracing and solid blocking between floor joists
Image
ICF bricks are stacked to form hollow walls that are reinforced with steel rebar before the concrete is poured in
Image
Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam
Image
Image
Image
Image
Pest proofing of this unvented crawlspace includes a metal termite shield that extends out from the sill plate, metal flashing wrapping the bottom of exterior rigid foam, and a termite inspection gap above interior rigid foam.
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
Right - Potential locations for crawlspace insulation: vapor sheeting should always cover the floor with insulation (a) outside walls, (b) inside walls, (c) both sides of walls, (d) sandwiched inside walls, or (e) under the first floor.
Image
Right – A sump pump with a perforated sump pit was installed in the crawlspace slab to reduce water accumulation under the slab
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
Right – Because this home is in a coastal location that may flood the crawlspace is vented and the home is constructed on metal piers.
Image
Image
Right – Foil-faced insulation was added after the crawlspace was dried and sealed by diverting water runoff, sealing off crawlspace windows and vents, and adding sump pumps and exhaust fan ventilation
Image
Right – Foundation drainage mat was installed over the waterproof membrane that covers the sealed crawlspace window
Image
Right – Interior grade is elevated and flood vents are located slightly above interior grade
Image
Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic
Image
Right – Spray foam insulation was sprayed onto the ground and along the sides of the foundation walls and piers of this insulated crawl space.
Image
Right – This crawlspace window was completely sealed off on the inside and outside with air barrier and water-proof materials and the window well was filled in to an above-grade height to prevent bulk water from entering the crawlspace
Image
Rigid foam insulation and a thin slab were installed over the dirt and gravel of this sealed crawlspace
Image
Image
Seal the crack between the sill plate and the foundation wall
Image
Image
Image
The floor of the sealed insulated crawlspace is covered with a heavy plastic vapor-barrier sheathing that is taped at all seams and around the foundation piers to prevent water vapor from moving into the crawlspace.
Image
The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place
Image
The polyethylene ground cover in the crawlspace is continuous at interior posts and piers
Image
The top course of these concrete masonry unit (CMU) crawlspace foundation walls and piers is filled with grout then sprayed with a waterproofing membrane that acts as a capillary break and prevents moisture from migrating into the framing material.
Image
Image
Image
Image
This house with interior insulated crawlspace is protected from pests with termite shield at sill plate, borate-treated framing, flashing at end of wall insulation, and a termite inspection gap at the top of the rigid foam
Image
Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas
Image
Unvented crawl space with interior insulation - designed for termite resistance in heavily infested areas
Image
Image
Image
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
Image
Image
Image
Water-proof materials cover the exterior side of crawlspace windows in a crawlspace retrofit, while foil-faced rigid foams seals and insulates the inside face of the openings
Image
Image
Wrong – A poorly sealed window and window well allow bulk water to enter the crawlspace from ground that slopes toward the structure
Image
Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor
Image
Wrong – The polyethylene sheeting vapor barrier is not attached to the piers with mechanical fasteners
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 – This vented crawlspace has standing water because steps were not taken to address site conditions that led to bulk water flow into the crawlspace