INSULATION - wall assembly

Conduction

a single solid material illustratesthe transfer of heat from thewarmer to cooler particles

convection

As air is warmed by the warmerside of the air space, it rises. As it falls along the cooler side, it transfers heat to this surface

Radiant Energy

is transferred from the warmer tothe cooler surface.

R-Value

The capacity of an insulatingmaterial to resist heat flow;the higher the R-value, thegreater the insulatingpower

Thermal break

a strip of insulating material taht is inserted into a building’s assembly to prevent rapid heat conduction through dense, highly conductive materials suchas masonry or steel.

prevents thermal bridge

Truss wall

uses 2 sets of studs liek the double-stud wall, but in this case the interior wall is the load-bearing wall

The interiorwall can be constructedwith 2x6 studs at 24 incheson-center or 2x4 studs at16 inches on-center.

vapor retarder

impermeable waterproof membrane where tehre’s moisture/warm air takign place

truss wall elements

A 2x6, 24-inch on-centerinterior structural wall isconnected to a 2x3, 24-inchon-center exterior non-structural wall spaced toprovide 12 inches of cavitywidth that is filled withcellulose insulation

vapor barrier is NEEDED in…

cold climate zones

where it is placed on the interior

vapor barrier is RECOMMENDED in…

warmer climate zones

where it is placed on the exterior

vapor barrier is PLACED where the ____ air is becaus eit holds more ____.

warm

moisture

Drywall

gypsum, plaster

pressed between 2 thick sheets of paper

used for interior walls and ceilings

Thermal Bridge

An area or component of an object which has higher thermal conductivity than surrounding materials

making a path of least resistance for heat transfer

T-post framing detail

prevents insulation from being installed on the exterior wall

cellulose insulation

ceilings/atticks, common in horizontal spaces

batt insulation

denser, panels or infill between studs

Rigid insulation (sheathing)

fluffy, attched to sheathing and prevents transfer of heat

closed-cell insulation

horizontal ceilings

polystyrene foam, retains most insulating value even when wet

open-cell foam insulation

sticky, dry wall attached directly to rfters

stciks to rafters and can have vaulted ceilings, not horizontal

Double stud wall

2 stud-framed walls set up

• one is structural

• one is nonstructural

allowing for thicker layer of insulation

increases thickness of wall