What components are included in the definition of draft-stopping materials?

The definition of draft-stopping materials primarily includes components that impede the flow of air and inhibit the spread of fire and smoke within building structures. Gypsum and plywood are commonly used materials for draft-stopping due to their fire-resistant properties and structural integrity.

Gypsum board, often referred to as drywall, is well-known for its ability to slow down fire and smoke, making it an ideal draft-stopping material in wall assemblies, ceilings, and floors. This is crucial in maintaining the safety and integrity of a building, particularly in multi-family residential structures. Plywood, while less fire-resistant than gypsum, provides additional structural support and can also contribute to the overall effectiveness of draft-stopping when used appropriately in conjunction with other materials.

In comparison, wood and metal might not inherently possess the same fire-resistant characteristics as gypsum. Insulation and plastic typically serve different purposes in construction, focusing more on thermal control rather than draft-stopping. Cement board and glass, while they have their uses, do not typically fit within the standard components for draft-stopping applications. Overall, the combination of gypsum and plywood is well-suited for meeting safety codes and performance standards in draft-stopping installations.