Performance Guidelines for Basement Envelope Systems and Materials

ir_71 · 03-28-2011, 07:15 AM

Audience
These Guidelines were written primarily for the technical decision-makers in the home building industry. They have been written to appeal to a broad audience, including people involved in the following sectors of the industry:
• home builders and contractors
• materials manufacturers
• codes and standards developers
• warranty agencies
• materials evaluators
• regulators
• building officials
• educators and trainers
Organization
The Guidelines have been organized into six parts:
Part 1 - Performance Requirements for Basements
Part 2 - Basement Envelope System Selection
Part 3 - Selection of Materials and Equipment for the Basement System
Part 4 - Critical Design Details
Part 5 - Quality Assurance
Part 6 - Basement System Cost/Benefit Analysis
The role of the basement envelope is reviewed in Part 1. Our general expectations of what basements are for and how they are expected to perform in what circumstances are laid out – these are the performance objectives of the basement envelope. From these follow the technical performance requirements – the structural requirements, the environmental separation functions, and the qualitative properties of the envelope system: buildability, durability, etc
Part 2 reviews the main construction approaches – the basement envelope systems that can be selected to address the performance requirements. The combination of environmental conditions (inside and out) and occupant expectations, combined with the selected envelope system determines the performance requirements of the materials to be used within the construction system.
Part 3 identifies the roles of the materials within the envelope system and indicates what performance characteristics have to be met by those materials for their given roles.
Part 4 addresses some key detailing issues, and the special requirements put on the design detail and the materials used; e.g., the wall-soil interface, window well detailing, etc.
Part 5 reviews various quality control tools available to the Canadian construction industry. Quality control is an essential element of achieving envelope system performance targets. Its role is to ensure that performance objectives laid out at the design stage are satisfied throughout the production chain: material manufacturing or site forming, assembly and finishing.
Part 6 introduces the concept of cost/benefit analysis as a planning tool for achieving a balance between long-term basement envelope system performance and first cost, for a range of scenarios and locations.

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