Retrotec USACE - Manual (Page 95)

Energy Assessment Procedure 73
TABLE 1. CAUSES OF ENERGY WASTE IN BUILDING ENVELOPES
Problem description Reference/appendix
Walls Poor wall insulation (waste) D1.1.1
Walls have multiple penetrations in the air barrier D1.1.2
Thermal bridges in the wall D1.1.3
Damaged or poor quality wall insulation D1.1.4
Open courtyard D1.1.5
Roof Poorly insulated sloped roof D1.2.1
Poor fl at roof insulation D1.2.2.
Metal roof painted with a low-refl ectivity paint D1.2.3
Ceiling and internal walls surfaces painted in dark colors D1.2.4
Poor attic fl oor insulation and sealing D1.2.5
Standing seam metal roofs have openings to the interior or
attic space D1.2.6
Floors Poor slab over unheated basement insulation D1.3.1
Poor slab-on-grade insulation D1.3.2
Floor penetrations D1.3.3
Single-pane windows with frames having no thermal breaks D1.4.1
Windows Failure of window seals D1.4.2
Gaps/leaks in and around window frames D1.4.3
Signifi cant wall area of industrial building is fi lled with single-
pane windows D1.4.4
Large single-pane windows in residential and offi ce buildings D1.4.5
Doors Doors lacking door seals (waste) D1.5.1
In cold and humid climates, having doors or air-conditioned
spaces that open to the outside (this applies to major
entrances and exits of a building) D1.5.2
Large doors in industrial and administrative buildings not pro-
tected by vestibules D1.5.3
Signifi cant infi ltration through truck docks D7.9.3
Air leakage Air leakage through the building envelope E
Operable windows that do not close properly E
Building openings or stacks that have no use E
Broken windows, skylights and doors E
Moisture penetration Poor moisture barriers that allow building components to become
wet
Other The space height signifi cantly exceeds needed for the current use