Natural Fiber InsulationAround the world, architects and green innovators are in the search of sustainable, non-toxic building material to replace fiberglass, foam and other chemical laden materials.

High Performance with  3" Mineral ThermaFiber Semi-Rigid Board 

Unlike the widely used, highly-toxic fiberglass insulation that can be found in almost every home across the United States and Canada; Mineral wool insulation is made from all-natural material

THERMAFIBER Industrial Board is an economical, semi-rigid, preformed mineral fiber insulation that offers excellent thermal and acoustical performance in both hot and cold applications.

  • conserves energy with high R values
  • maintains interior temperatures,
  • is highly fire resistant
  • provides personnel protection with no fiberglass or hazardous materials,
  • prevents condensation, mold and mildew, and
  • reduces noise emission and transmission,
  • and is made of 70% recycled content

Shelter works carries the 10 PCF size, providing the most common and versatile product with high R values.  This product is generally about 3" thick.

Download the Thermafiber Industrial Board Datasheet.

Nominal Density




10 pcf

1”- 5”

24”, 36, 72”

48”, 60”, 72”

*Thicknesses are available in 1⁄2” increments. **Custom sizes are available upon request.

About ThermaFiber Mineral Wool Insulation

From Thermafiber- Technical Bulletin  

Environmentally Friendly/ Healthy

Thermafiber insulation products provide a high recycled content, energy efficiency through high R-Values, and indoor environmental air quality with excellent acoustical performance and low off-gassing.

Thermafiber Products- Recommended for Green Building

Why are Thermafiber products considered to be environmentally friendly? Thermafiber products fit into the following categories that are intended to reduce or eliminate the negative impact of buildings/building materials on the environment and occupants:

Recycle Content (Post-Industrial):

Pre-consumer recycle content:
EPA Choice Fiber (US Government Buildings).........................................75% Regular Mineral Wool Products........................................... ..Minimum 70% Post-consumer recycle content...............................................................0%

Indoor environmental quality:

Thermafiber Insulation products have also been evaluated by an independent testing laboratory for emissions of total volatile organic compounds (TVOC), individual volatile organic compounds (IVOC), formaldehyde and other aldehydes using a product evaluation test protocol following requirements of ASTM Standard D 5116 and CAEEC 225 Section 01350 protocol (1,2).

Results of the evaluation showed Thermafiber products to meet the California purchase specifications for TVOC and general chemical emissions. Formaldehyde concentration of Thermafiber Insulation at 12 ppb meets or exceeds the California standard of 20 ppb max. for formaldehyde concentration.

Another attribute that Thermafiber products provide is sound attenuation. Thermafiber sound attenuation products absorb sound passing between partition walls and floor/ceiling applications and are capable of providing sound transmission coefficients (STCs) that improve the indoor environmental quality for the occupants of a structure.

Energy efficiency and renewable energy:

Thermafiber insulation reduces the transfer of heat (and cold) through building structures or envelopes by providing a thermal resistance range of 3.7 to 4.2 per inch depending on product type. Thermafiber Insulation not only reduces energy use and therefore CO2 emissions, but in addition, also provides thermal comfort. Thus the same holds true for the industrial/manufacturing sector.


Provide sustainability to the environment:

Thermafiber has taken great strides in reducing negative impact on the environment that comes from the mining and harvesting of raw materials. Over the years the availability of low cost by-products with similar chemical make up as mined rock have been made available. Now the majority of raw materials used to manufacture our products come from a by-product of the steel industry called slag. Thermafiber does not use raw materials that are considered finite, rare or endangered.

Ready to find out more?

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