Roof Insulation

Definition

Roof insulation refers to materials used between rafters or roof supports to protect against heat and cold. It can also include solid sheets of insulating material installed on a flat roof.

Purpose

The purpose of roof insulation is to reduce heat transfer through the roof, enhancing the building's energy efficiency, maintaining comfortable indoor temperatures, and reducing energy costs for heating and cooling.

Examples of Use

• Fiberglass batts installed between rafters in residential attics to prevent heat loss in winter and heat gain in summer.
• Rigid foam boards placed over the roof deck in commercial buildings to provide continuous insulation and improve thermal performance.
• Spray foam insulation applied directly to the underside of the roof deck in homes to create an airtight seal and high R-value.

Related Terms

• R-Value: A measure of thermal resistance used to rate insulation materials.
• Attic Insulation: Insulation specifically installed in the attic space to improve energy efficiency.
• Thermal Barrier: A material that slows down heat transfer.

Notes

Proper installation of roof insulation is crucial for maximizing its effectiveness, preventing thermal bridging, and ensuring the longevity of the roofing system.