1.8: Envelope

(35 points)

GREEN GLOBES #1.8.1 Has the current performance and condition of the building envelope been assessed in terms of:

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The condition of the building envelope is critical to the building performance. An assessment of the current performance and condition of the envelope should consider the issue of relative humidity temperature and interior pressure.

GREEN GLOBES #1.8.1.1 : Condensation?

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Consider the differences in temperature on the inner surface of the building and the water vapor condensation on the surface of thermal bridges - the mold and mildew control points.

GREEN GLOBES #1.8.1.2 : Moist air transfer?

GREEN GLOBES #1.8.1.3 : Air flow?

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Consider the envelope permeability and the ability of materials to withstand, without deterioration, periods of freezing rain and thawing.

GREEN GLOBES #1.8.1.4 : Heat transfer?

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Assess the thermal resistance and quantity of heat transferred through the envelope.

GREEN GLOBES #1.8.2 Are there energy-efficient windows and doors? 

• Yes (5 points) 
• No (0 points)

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Energy efficient windows consist of, at a minimum, double-glazed, low-e windowpanes with frame spacers that have high thermal integrity. High performance weatherstripping on doors and windows also increases their thermal performance.

GREEN GLOBES #1.8.3 Does the building have appropriate shading or reflective film installed to reduce the cooling load? 

• Yes (3 points) 
• No (0 points)

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Exterior awnings, exterior and interior solar blinds, green roofs and exterior vegetation, high-albedo (reflective) roofing materials, and low-e film reduce cooling loads and reduce glare.

GREEN GLOBES #1.8.4 Has the building envelope been air-sealed in the following areas:

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Stack effect and air leakage through the building envelope can cause significant heat loss and deterioration of the building envelope. One indication of a leaky building is when in the winter the occupants in the lower levels complain of a draft and cold and those in the upper levels complain of over-heating.

GREEN GLOBES #1.8.4.1 : The top part of the building? 

• Yes (4 points) 
• No (0 points)

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Exterior openings and roof-to-wall connections of mechanical penthouse and floors in the upper part of the building.

GREEN GLOBES #1.8.4.2 : The bottom part of the building?

• Yes (4 points) 
• No (0 points)

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Exterior openings and floor slab-to-wall connections and service core of the parking areas, entrance doors and the floors in the lower third of the building.

GREEN GLOBES #1.8.4.3 : Vertical shafts and elevators? 

• Yes (3 points) 
• No (0 points)

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Service ducts and conduit penetrations, including excessive cable holes in the elevator shafts.

GREEN GLOBES #1.8.5 Does the insulation of the walls comply with the recommendation of the building condition report? 

• Yes (6 points) 
• N/A (6 points) 
• No (0 points)

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Because of the factors involved, proper application of the insulation should be guided by the federal or state energy building code. Where the insulation meets federal or state energy building code, select "N/A" and 6 points will be awarded.

GREEN GLOBES #1.8.6 Does the insulation of the roof comply with the recommendation of the building condition report? 

• Yes (6 points) 
• N/A (6 points) 
• No (0 points)

Tooltip

Because of the factors involved, proper application of the insulation should be guided by the federal or state energy building code. Where the insulation meets federal or state energy building code, select "N/A" and 6 points will be awarded.

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