Architects

Specify with Confidence

Designed with versatility and occupant well-being at its core, SANCTUARY® by Greenfiber® provides superior thermal performance and sound control across walls, ceilings, floors and attics. This sustainable cellulose insulation empowers architects to specify a single solution that simplifies project planning, meets stringent energy codes, supports LEED points and ultimately creates quieter, healthier and more energy-efficient spaces.

Power every project with knowledge

Access all the technical details, building code support and installation know-how you need to insulate with confidence — and meet today’s building standards with ease.

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Applications

Versatile Insulation for Every Application

From top to bottom, SANCTUARY adapts to every part of the building envelope — filling gaps, corners and hard-to-reach spaces where other insulation can’t. Its dense structure forms a barrier that reduces air infiltration, boosting thermal and sound performance. Easy to install and trusted by professionals, it delivers comfort where it counts.

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Superior Performance. Sustainable Choice.

SANCTUARY® by Greenfiber® transforms homes with cellulose insulation that fills every gap, joint, and crevice. Proven to withstand fire with permanent fire retardants that last the life of the home, it’s carbon-negative and made from 85% recycled paper. Beyond eco-friendly benefits, SANCTUARY reduces noise, boosts energy efficiency, and meets modern building codes — the smarter way to insulate.

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Need specs, support or solutions?

Our team of insulation experts is ready to help with product info, project advice or anything else you need to get the job done right.

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