This Weatherization Field Guide outlines a set of best practices for the Weatherization Assistance Program (WAP). Weatheriza­tion experts collaborating with the National Renewable Energy Lab (NREL) developed the Standard Work Specifications (SWS) beginning in 2009. These new SWS standards reside online in NREL’s SWS Tool.

The SWS presents required specifications and outcomes for weatherization measures when a weatherization agency selects a weatherization measure, based on its cost effectiveness. The technical content of this guide aligns with the SWS require­ments as updated by October of 2017.

A major purpose of this guide is to show how its contents are aligned with the SWS. Therefore, we’ve inserted hypertext refer­ences to the specific SWS details that our content aligns to. When you click on one of these references, the relevant detail appears in your browser.

This guide also incorporates information from a variety of other standards and specifications.

We begin this guide with health and safety, an important topic for both workers and clients. The first part of the chapter dis­cusses client health and safety. The last part of the chapter covers worker health and safety.

Next, the guide presents a chapter on energy auditing, inspect­ing, work-orders, and customer relations. The following chapter discusses insulation and air sealing materials and their charac­teristics. Next we present four chapters on the four distinct parts of the building envelope: attics and roofs; walls; floors and foun­dations; and windows and doors. Much of the content for these chapters is relevant to multifamily buildings as well as single-family buildings.

The guide’s largest chapter is heating and cooling. This chapter contains a lot of information that is as relevant for multifamily buildings as for single-family buildings.

We created a separate chapter on ventilation that follows heating and cooling, which includes whole-house ventilation, local ven­tilation, attic and crawl-space ventilation, and ventilation for cooling.

We’ve included a dedicated chapter on manufactured (mobile) homes where we discuss the ECMs particular to mobile homes. In this chapter, we often refer to other sections of the guide that contain information that’s relevant to both mobile homes and site-built homes.

The last chapter’s topic, Air Leakage Diagnosis, is a tool for weatherization agencies to guide cost-effective air sealing. This chapter doesn’t align to the SWS because the SWS doesn’t spec­ify testing procedures.

Like the SWS, this field guide is a living document and a work-in-progress. The field guide changes as the SWS changes. We hope you find this guide authoritative, easy to use, and well aligned to the SWS. We welcome all comments, suggestions and criticism.

Thanks for your hard work and dedication in implementing the Weatherization Assistance Program.