3.1203.4 Window Replacement

Topic: 
Windows and Doors
Subtopic: 
Replacement
Desired Outcome: 
Maintain a continuous air and thermal barrier, and high efficiency window performance
For supporting material, see Referenced Standards and Building America Solution Center.
TitleSpecification(s)Objective(s)
3.1203.4a
Design considerations

Glazing type will be chosen by location in the building, building height, code, and climate

Window frame will be insulated and selected with thermal breaks appropriate to climate

Window selection will be based on lowest air leakage rating

Window selection will be based on National Fenestration Rating Council (NFRC) rating by climate

Glazing with lowest feasible U-value will be specified

Window glazing solar heat gain coefficient ( SHGC SHGC Solar heat gain coefficient ) will be selected by building orientation and climate

Water management system will be maintained

Windows will meet the performance standard AMAA/ WDMA WDMA Window and Door Manufacturers Association, www.wdma.com / CSA CSA Canadian Standards Association /101/IS2/A440

Historic preservation requirements will be considered

Ensure the most effective and appropriate glazing system is specified

3.1203.4b
Pre-Inspection

Conduct pre-inspection in accordance with SWS 2.0100.4 Work Area Inspection and Stabilization

Ensure safety, effectiveness, and durability of improvements

3.1203.4c
Worker safety

All worker safety specifications will be in accordance with SWS 2.0100.3 Worker Safety

Ensure worker safety, especially in regard to fall protection considerations and contaminants found in demolition, such as asbestos, lead, polychlorinated biphenyls, etc.

3.1203.4d
Occupant safety

Occupant will be notified of changes or repairs to be made

An occupant safety plan will be prepared and implemented

Occupant will be shown how to properly operate windows and doors

Building management and occupants will be notified about the risk of a child falling from operable windows with sills located more than 72" above any surface outside window opening

Ensure occupant safety

3.1203.4e
Sealant selection

Sealants will be compatible with their intended surfaces and applied in accordance with manufacturer specifications

Selection will be durable, pest resistant, and have a weather-appropriate seal

Indoor sealants will be low volatile organic compound ( VOC VOC Volatile organic compound ) products that meet independent testing and verification protocols, such as Green Seal GS-36, "GREENGUARD Children and Schools," or comparable certifications

Fire-resistance-rated assemblies will be provided with sealants permitted by the authority having jurisdiction and adopted building code

Prevent intrusion of moisture and pests into the sealed assembly

Prevent exposing workers or occupants to excessive VOC VOC Volatile organic compound levels

Ensure sealant meets or exceeds the performance characteristics of the assembly and is compliant with local fire code requirements

3.1203.4f
Window location, installation, and sealing

Glazing system frame will be aligned with the wall system's air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow to create a continuous air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow

Glazing system will be installed in accordance with manufacturer specifications

Rough opening will be prepared and sealed to the wall system's continuous air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow with nonexpanding sealants

When replacement windows are being installed within an existing window frame where the original sash has been removed, the window frame will be prepared and sealed to the wall system's continuous air and thermal barrier

When the existing window frame has internal weight pockets, the hardware will be removed and the pocket will be insulated and sealed

Glazing system will be sealed to the airtight rough opening or the airtight existing frame

Maintain a continuous air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow throughout the entire wall system

3.1203.4g
Quality assurance

A sampling protocol will be used to test glazing system for air leakage in accordance with ASTM ASTM ASTM International, www.astm.org E783-02

A sampling protocol will be used to test glazing system for water leakage in accordance with ASTM ASTM ASTM International, www.astm.org E1105-00

Ensure airtight and watertight installation