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Guide with details about how to provide a continuous water control layer across the roof assembly by sealing all roof penetrations in existing homes.

Guide with information about how to install flashing integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.

Guide describing how to retrofit an existing basement floor or slab to reduce moisture issues.

Guide providing information about treating bulk water drainage issues and moisture control measures in existing basements and crawl spaces.

Guide describing how to install and properly integrate flashing at the intersection of an existing wall and an existing intersecting roof

Guide describing how to insulate the sill beam or sill plate on the exterior side in a way that allows drying to the exterior, as part of an exterior wall upgrade.

Report covering the fundamental waterproofing strategies for tub and shower assemblies.

Report focusing on managing the driving forces that move air and water vapor across the building envelope.

Case study describing a retrofit project in the cold and very-cold climate zones.

Guide describing how to re-roof an existing home with a sloped roof.

Guide describing an approach to re-roofing an existing flat roof to improve thermal, water, and air control performance.

Guide describing how to repair or replace skylights in existing homes. 

Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.

Guide describing how to insulate a new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.

Guide describing how to apply an air control layer directly over existing wall sheathing, and cover by two layers of insulating sheathing held in place by vertical furring strips.

Guide describing blown insulation into exterior wall cavities of existing homes with minimal disruption to occupants.

Case study describing a retrofit project in the cold and very-cold climate zones.

Case study about a multifamily retrofit project in a cold climate.

Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.

Guide describing the design and installation considerations for recladding of above grade walls using insulated vinyl siding.

The intent of this brief is to provide code-related information about sealing and  insulating crawl space walls in existing residential buildings to help ensure that the measures will be accepted as being in compliance with the code.  Providing the same information to all interested parties (e.g., code officials, builders, contractors, designers, etc.) is expected to result in increased compliance and fewer innovations being questioned at the time of plan review and/or field inspection.

Report about the fundamental concepts that must be understood at the planning or initial nspection of existing homes regarding surface and ground water management.

Guide describing best practice venting strategies for existing steam heating systems in multifamily buildings.

Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.

The intent of this brief is to provide code-related information about sealing and insulating existing walls in existing residential buildings to help ensure that the measures will be accepted as being in compliance with the code.  Providing notes for code officials on how to conduct plan reviews and field inspections can provide jurisdictional officials with information for acceptance.  Providing the same information to builders, contractors, designers, and others is expected to result in increased compliance and fewer innovations being questioned at the time of plan review and/or field inspection.

This guide provides information about heat pump water heaters.

Guide describing how to insulate the walls of an existing home with spray foam insulation.

Guide describing how to apply flashing to the bottom of exterior walls to create a continuous drainage plane.

This guide provides information about installing Insulating sheathing above the roof deck on existing homes. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic.

Guide describing how to correctly slope surfaces outside a home to force water to flow away from the edge of the home.

Guide describing how to insulate closed crawlspace walls and band joist areas with rigid foam board insulation.

Guide describing how to install moisture-resistant materials on walls behind showers and tubs to help manage moisture.

Guide describing principles of insulating band joists as a stand alone energy upgrade, or as part of creating a closed crawlspace.

Guide describing how to add spray foam insulation to the underside of the existing roof deck.

Guide describing how to design a water-efficient landscape that will minimize the need for supplemental water by using the WaterSense® Water Budget Tool.

Guide describing how to install a tankless hot water heater in a new or existing home to provide domestic hot water that is heated on demand without the standby losses associated with tank storage water heaters

Case study describing novel technique for installing exterior spray foam on foundation walls that uses high-pressure water sprayer and a “hydro vac” to remove dirt along the foundation wall.

Case study about a structural sheathing product composed of enhanced EPS rigid foam with OSB adhered on one side.

Guide describing water metering in multi-family buildings. 

Guide describing how to install and test all water-using fixtures, equipment, and appliances to ensure there are no leaks.

Research study presenting results of an existing home monitoring project designed to measure wall cavity moisture characteristics.

Guide describing how to apply heavy membranes at eaves in cold climates to help guard against ice dams.

Case study of a Concord four-square home retrofitted by Building Science Corporation in Massachusetts.

Guide describing how to install a capillary break under a slab foundation using either polyethylene sheeting or rigid insulation installed over aggregate or over sand and geotextile matting.

Guide describing how to install step and kick-out flashing on roofs.

Research project aimed to verify whether homes in the New Jersey HPwES program achieved 30% source energy savings, and if so, what measures were implemented to achieve them.

Case study about a deep energy retrofit, turning an old school into 12 high-end apartments in Greenfield, MA.

Guide describing how to apply water management strategies to below grade walls.

Guide describing how to help drain water away from the perimeter footing.

Guide describing how to install a capillary break to help manage moisture in foundations.

Guide describing how to properly grade a site so water will not saturate the soil, and penetrate into the foundation.

Report on hybrid ventilation methods for insulated and sealed crawl spaces.

Report on hybrid ventilation methods for insulated and sealed crawl spaces.
Report on hybrid ventilation methods for insulated and sealed crawl spaces.

Guide describing installation of sump pumps in the basement or crawlspace of a home.

Vapor retarders can be a crucial part of the building envelope and can help manage moisture issues to keep the home dry. However, before installing a vapor retarder, installers must be aware that in some instances vapor retarders can increase the likelihood of condensation issues.

Guide describing the need for covers on sump pumps in the basement or crawlspace of a home.

Guide describing techniques for installing insulating sheathing as a continuous drainage plane on walls.

Information Guide: Home Performance Assessment

Guide describing installation of a fully sealed continuous weather resistant barrier to help drain water away from above-grade walls.

Article describing methods to manage moisture, rainwater, and vapor in basements and crawlspaces. 

Reference/Resource: Rain Control in Buildings

Document covering basic moisture control principles in the design of above-grade building enclosures; driving rain as a moisture load on walls; a classification system of the various rain control strategies available for walls; and good design practises for walls.

Guide providing information about controlling rainwater through use of drainage planes.

Video describing the thermal breaks in a passive house basement.

Guide describing how to install flashings to help direct water down and out at all the openings in a wall system.

Guide describing how to apply heavy membranes at valley/roof deck penetrations in wet climates to help drain water away below the roofing.

Guide providing information about installing boiler controls in multifamily housing.

This guide describes how to install a rigid air barrier to walls behind showers and tubs.

Guide describing how to install stucco over rigid foam insulaiton in new and existing homes.

This presentation will help you define insulated siding, understand R-value testing of insulated siding, describe proper installation of insulated siding, comply with energy codes and understand building energy performance program and software recognition.

Guide describing construction and insulation techniques for double wall framing.

Guide describing how to create a capillary break at all crawlspace floors using polyethylene sheeting to manage moisture in crawlspaces.

Guide describing methods for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls to provide an insulated space for HVAC equipment.

Guide describing how to insulate a basement to improve the overall thermal performance of the building and provide more dry, usable conditioned space for home occupants and for HVAC equipment.

Guide describing how to install insulated concrete forms to block excessive heat loss and gain though structural framing.

Guide describing insulation of piping in exterior walls.

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