Sweets ProductTAG
GYP-SPAN® Radiant
GYP-SPAN® Radiant is a gypsum concrete floor underlayment designed specifically for use over radiant heating systems. It encases the hot water tubes or electrical cables without air bubbles, creating a superior thermal mass that provides uniform heat transfer. GYP-SPAN® Radiant floor underlayment is the energy efficient and cost-effective way to create a smooth, flat, evenly heated floor surface for the attachment of virtually any finished floor covering.
Recommended For
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Radiant Floor Heating Application / MarketInstalled over radiant heating systems (electric cables or hot water tubes) |
Features & Benefits
- Provides superior thermal mass for uniform heat transfer
- Adheres to tubes or cables without air bubbles, dries without shrinkage cracks
- GYP-SPAN® Radiant floor underlayment helps seal room perimeter for increased energy efficiency
- Creates smooth, flat surface for the installation of finished floor goods
- Used in "Green" construction
- Quick drying; can be walked on in 90 minutes
- Expert application; installed only by trained, Licensed Applicators
- GYP-SPAN® Radiant floor underlayment has approvals from ICC-ES 4147 and HUD
Product Resources
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Product Submittal |
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3-Part Specifications |
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Project References |
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BIM |
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CAD |
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Drying Conditions Flyer |
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Post-Pour Instructions |
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Guidelines for Finished Floor Coverings |
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Technical Data |
Properties |
ASTM |
| Weight | 14.6 lbs/ft2 at 1-1/2" (38mm) | C472M |
| Thickness | 1-1/2" (38mm) | |
| Compressive Strength | 2000 - 3200 psi | C472M |
| Thermal Performance | K-value of 4.35 Btu/ft2·h·°F; R-value of 0.23 ft2·h·°F/Btu | C177 |
| Fire Hazard Classification | Flamespread index 0; Fuel Contribution 0; Smoke Density 0 | E84 |
| Patty Size | 7 1/2" (191mm) plus or minus 1/2" (13mm) in diameter | |
| Sand | 1/8" (3mm) or less washed plaster or masonry sand | E11 |
| UL listings | Listed in over 100 1, 2, 3 and 4 hour floor/ceiling assemblies |