Celotex Structodek®
As an insulation board, coverboard or re-roof/recover board, Structodek® High-Density Roofing Board is the answer for low-slope applications and systems.
Structodek® is not only an integral roofing system component; it also makes roofing easier with physical properties that generate structural rigidity and dimensional stability.
The fiberboard composition of Structodek® possesses natural bonding qualities, resulting in superior adhesion capabilities. Adhesive tightly grasps the fibers of Structodek® without causing excess absorption, providing a solid and secure roof system which bonds very well with many asphalt, coal tar, and cold process adhesive products.
The lightweight nature of Structodek® is better than heavier alternatives and will keep the roof load below the specified maximum weight.
Structodek® Brochure (Download 
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Structodek® Approvals List
Structodek® general product properties:
- All board thicknesses have a ≤ 7% water absorption value (7% max per ASTM C208
- All board thicknesses have been approved as components in UL Class A Systems (consult UL Guide for approvals)
- All board thicknesses have been approved as components of 1-60 and 1-90 systems per FMCR Standard 4450/4470 (see FM Guide for approvals)
- Structodek® is available in coated one-side to reduce asphalt bitumen absorption as well as coated six-sides, providing maximum protection on all exposed surfaces.
Meets the needs of today’s professional
Available in a variety of thicknesses, coating coverage options and panel sizes, Structodek® meets the needs of today’s roofing professional.
Benefits of Structodek® include:
- Approved in UL Class A rated roof systems
- Structurally rigid and dimensionally stable board easily handles heavy foot traffic and wheeled loads
- Superior adhesion without excess absorption
- Contributes to thermal insulation with R-values ranging from 1.3 to 5.0
- Lightweight and easy to install, without the irritating fiberglass dust of glass mat faced gypsum board
- Easily handles hot asphalt, non-blistering
- Cuts with a standard utility knife
Systems in which Structodek® is approved:
- Single-ply (thermoplastic/elastomeric)
- Modified bitumen (cold/hot mopped)
- Built-up roofing systems (asphalt/coal tar)
- Hybrid systems
- Self adhered
- Spray foam (SPUR)
- Liquid membranes