Owens Corning 541799 Attic Stairway Insulator

Product Description

The OWENS CORNING 541799 is an attic stairway insulator designed to seal the thermal gap created by pull-down attic stair access points. Constructed from pink fiberglass insulation with a highly reflective foil facing, it limits heat transfer between conditioned living space and the unconditioned attic above. The unit is removable, allowing continued access to the attic without permanent modification. Installation requires no special tools and is suited for HVAC technicians, insulation contractors, and knowledgeable DIYers working to improve building envelope performance year-round.

This insulator is used in residential attic applications where pull-down or fold-down stair assemblies create an uninsulated opening in the ceiling plane. Without an insulator in place, the stair opening acts as a direct thermal bypass, reducing the effectiveness of the surrounding attic insulation. The 541799 addresses this gap and supports consistent thermal comfort in heating and cooling seasons. It carries Energy Star and GreenGuard certifications, making it appropriate for energy-efficiency retrofits and new construction projects seeking certification compliance.

Key Features

• Pink fiberglass insulation core provides thermal resistance at attic stair openings
• Highly reflective foil facing reduces radiant heat gain and loss
• Removable design maintains full attic access after installation
• Energy Star rated for residential energy efficiency compliance
• GreenGuard Certified for indoor air quality standards
• No permanent fasteners required for standard installation

Compatibility

Designed as an OEM-style replacement and retrofit solution for standard residential pull-down attic stairway openings.

Installation Notes

Installation is performed by insulation contractors, HVAC technicians, or qualified building envelope professionals. No attic power or gas shutoff is required for this product, but work in attic spaces should follow standard safety practices including proper lighting, fall protection at the opening, and respiratory protection against fiberglass particulate. The insulator should be sized and fitted snugly to the stair opening perimeter to eliminate air gaps that reduce thermal performance.

Technical Specifications

• Item Type: Stairway Insulator
• Insulation Material: Pink Fiberglass
• Facing Material: Reflective Foil
• Certifications: Energy Star, GreenGuard Certified

Standard Information

• Brand: OWENS CORNING
• Manufacturer Part Number: 541799