Enclosure

Moisture Defence

- overhangs > 2' - belt course - awnings - drip edge - gutters & downspouts - sloped ground

Building Enclosure

- structural support - rain control - thermal control - airflow control - vapor control

Open Cell Spray Foam

-only interior application -not good with water -cannot be used as water/ air/ vapor barrier -better for noise barrier -less expensive -mold resistance

Class 2 Vapor Retarder

0.1-1.0 perm some plywoods latex paint kraft paper rigid foam insulation (+3 in)

Class 3 Vapor Retarder

1-10 perm gyp board with latex paint > 10 perms, insulation & house wrap

Expanded Polystyrene

A foamed styrene plastic; has high resistance to heat flow; mechanical strength relatively high for such a light material. A closed cell material used for insulation. Space between beads can absorb water so vapor barrier is needed. Manufactured from Petrochemicals. Big embodied energy content. Flexible and high r value Frequently used in packaging, open cell texture. Closed-cell foam used for a growing number of purposes including building insulation. Rigid foam insulation constructed of small poly styrene beads fused together inside a mold A rigid, closed-cell foam used as insulation. Also known by the trademarked name Styrofoam May be used as a rain/vapor/air barrier (if seams are taped) as well as insulation. Versions available for exterior use, can be exposed to moisture. Suitable for below grade use.

Lateral Load

A force acting generally in a horizontal direction, such as wind, earthquake, and soil pressure against a structure.

Section Modulus

A geometric property of a cross section, defined as the moment of inertia of the section divided by the distance from the neutral axis to the most remote surface.

Latex Paint

A paint serves as a vapor barrier and latex binder that coalesces as water evaporates from the emulsion. aka: rubber-based paint, water base paint.

Kraft Wrap

A strong, usually brown paper, processed from wood pulp and sized with resin. Contains less recycled fiber and more softwood fibers, which are longer and thus enable a thinner wrap that is less likely to tear. Ideal for use behind stucco, masonry, and brick walls, this paper-based product comes in varieties able to resist water for 10, 20, 30, 60, and even 150 minutes.

Polymeric Wrap

Heat vinyl is a thick flexible layer of polymer paper and has a heat-activated adhesive backing. Also, can be a peelable film and is an alternative to traditional wrapping paper.

Lateral Soil Loads

Horizontal pressures of the earth and groundwater against the foundations.

Class 1 Vapor Retarder

Less than 0.1 perm, vapor Barrier - vapor impermeable. foil thick poly sheet vinyl wallpaper whiteboards melamine

Faced Polyisocyanurate

Foil-Faced Foam Sheathing board is rigid polyisocyanurate foam sheathing that provides exceptional heat, moisture and air control to protect your building's exterior walls, and when installed correctly, eliminates all major thermal bridges that cause heat loss. Continuous exterior sheathing required per building codes in many states. Lightweight: easy to handle, can be cut with a utility knife or saw. High Energy Efficiency: Polyiso has the highest R-value per inch of any rigid board insulation. Low Permeability: Ideal for controlling condensation in walls. Can be used in residential construction as insulated sheathing in above grade exterior walls, above and below grade interior walls, basements, crawl spaces, attic, garage doors, and cathedral ceilings as well as Type I-IV commercial applications. One side has a reflective foil face typically installed toward the warm air surface to reflect energy back toward the dwelling and the other side has a white non-reflective foil face typically installed toward the interior Does not melt when exposed to flame versus other types of rigid foam board (ASTM E84) When properly installed, AP Foil-Faced Polyiso Continuous Insulation functions as a water-resistive barrier, vapor barrier and air barrier, eliminating the need to install additional components. May be used as a rain/vapor/air barrier (if seams are taped) as well as insulation. Versions available for exterior use, can be exposed to moisture.

Roof Membrane Fluttering

When a mechanically attached roof membrane experiences suction or uplift from wind air is pulled into the roof assembly from the building interior if an underside air barrier is not present.

Hydrostatic Pressure

Pressure exerted by a volume of fluid against a wall, membrane, or some other structure that encloses the fluid.

Wind Load

Pressure from the wind that can cause lateral loads as well as uplift on the roof or downward pressure.

Extruded Polystyrene (XPS)

Rigid foam insulation created from polystyrene crystals, an additive, and a blowing agent that are mixed, melted, and pressed into the rigid foam. similar to EPS, but comes in sheets and color (green, pink, etc). Better insulated per inch. May be used as a rain/vapor/air barrier (if seams are taped) as well as insulation. Versions available for exterior use, can be exposed to moisture. Suitable for below grade use. Has higher embodied energy than cellulose.

Peel and stick membrane

Speed of application, high quality and uniform film thickness without the need to torch, weld and use heating products. They are also particularly beneficial for surfaces that are very dense or sealed. Roof underlayment.

Bending Moment

The combination of tension and compression forces that cause a beam or other structural member to bend.

Live Load

The weight of movable objects such as people, furnishings, machines, vehicles, and goods in or on a building.

Dead Load

The weight of the building or building components.

Mineral Wool

Thermal or sound Insulation composed principally of fibers manufactured from rock, slag, or glass with or without binders. Least expensive. May act as a capillary break drainage plane. Most fire resistant. Versions available for exterior use, can be exposed to moisture.

Liquid-Applied Membrane

Acrylic elastomeric waterproof membrane and air barrier that can be rolled, brushed or spray applied. It can be used to treat wall joints and flash rough openings with the use of embedded fabric. It is extremely flexible as it can bridge cracks and accommodate small movements up to 1/32 inches. Generally applied to cast-in-place concrete surfaces. The product is a certified air barrier designed to maximize energy efficiency.

Thermal Bridge

An area within the building envelope where heat transfers from inside to outside or vice versa. Such as a steel stud in an insulated stud wall or metal fastener.

Overturning Moment

An external moment generated at the base of a structure by a lateral load applied at a distance above grade

Hybrid Wraps

Combining two material types. These products' integrated backup can bring peace of mind. For example, asphalt-based wraps can be backed by a spun-bonded polymeric layer.

Glass fiber (fiberglass)

Composite material made of a plastic matrix reinforced by tiny glass fibers. It is lightweight yet strong, and a very effective insulation material. Least expensive. May act as a capillary break drainage plane. Most fire resistant. Versions available for exterior use, can be exposed to moisture.

Woven Polymeric Wraps

Made of crisscrossing plastic tapes coated with a waterproof film and may be micro-perforated to allow vapor to pass. Ideal for use behind fiber cement siding, wood, and vinyl, the film can also include UV inhibitors if prolonged exposure, up to about four months, is expected.

Nonwoven Polymeric

Made of spun-bonded polymer resins; the fibers are melted and flattened to form a fabric-like material. Nonwoven wraps can be specified with surfactant resistance to construction chemicals that might be sprayed, such as power washing solutions and detergents. Tyvek

Vapor Retarder

Material used to retard the flow and diffusion of water vapor through walls and the building assembly where this vapor may condense at a lower temperature. Meant to throttle moisture, 10:1 nadar.

Air Barrier

Material(s) assembled and joined together to provide a barrier to air leakage and reduce it through the building envelope. reduces the risk of condensation build up. House wrap and fluid- applied methods are examples. - Vapor membrane - Gyp board (exterior) - OSB - Housewrap fasteners - plastic membrane - Closed cell spray foam - Concrete - Roof membrane - Glass & metal

Closed Cell Spray Foam

Medium density, rigid polyurethane foam that provides an excellent air, vapor and moisture barrier. It is used in interior and exterior applications, both above and below grade. Closed-cell foam has a much higher R-value (R-5.5 to 6.0) than traditional insulation and can maximize R-value with limited thickness. It can dramatically add to structural integrity due to its high density and compression strength.

Fully Adhered Membrane

Monolithic, fully-bonded, fluid-based coatings that have the capability of being fully or locally reinforced in transitional areas on a roof. Van be applied over various substrates such as concrete, brick, wood, mod-bit, TPO, PVC, EPDM and many other surfaces. Form a rubber-like, elastomeric, seamless waterproofing membrane with no cracks, gaps or voids to allow the ingress of water. Allow for easy application of roofing systems to complicated details and penetrations with little to no waste.