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Radiant Floor - Under Slab
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Radiant Floors Application Information Sheet (98KB PDF)
Radiant floor heating directs heat upward into the room. To ensure effective operation of the system, particularly for under-slab floor designs, insulation is an important consideration. Properly insulating radiant floor systems makes it possible to provide maximum comfort at minimum cost. Install STYROFOAM™ extruded polystyrene insulation under the slab to provide moisture protection and to prevent radiant floor heat from dissipating into the ground. Dow Building Solutions† offers a number of STYROFOAM extruded polystyrene products with high compressive strength to satisfy a variety of loading situations, and superior moisture resistance to provide long-term R-value for radiant floor-under slab applications. The products are tough and durable to withstand normal construction site handling and are easy to cut and install.
There is a STYROFOAM insulation product that is right for every radiant floor-under slab application.
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| Features & Benefits |
Recommended Product Solution |
Product Information Sheet |
Guide Specs |
CAD Details |
| Compressive strength of 40 psi (5760 psf) makes product suitable for most slab, protected membrane and plaza roof applications where only foot traffic is anticipated. Can be used in areas with expected live loads of 8psi (1,152 psf) and dead loads of 13.3 psi (1920 psf). (see your Dow representative for specific load vs. product recommendations) |
STYROFOAM Highload 40 |
English (147KB PDF) |
English (14KB PDF) |
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| Higher compressive strength 60 psi (8,640 psf) makes product suitable for more demanding loading situations. Can be used in areas with expected live loads of 12 psi (1,728 psf) and dead loads of 20 psi (2880 psf). (see your Dow representative for specific load vs. product recommendations) |
STYROFOAM Highload 60 |
English (147KB PDF) |
English (14KB PDF) |
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| Highest strength foam plastic insulation available. The 100 psi (14,400 psf) strength makes the product suitable for extremely high loading situations. Can be used in areas with expected live loads of 20psi (2,880 psf) and dead loads of 33.3 psi (4,800 psf). (see your Dow representative for specific load vs. product recommendations) |
STYROFOAM Highload 100 |
English (147KB PDF) |
English (14KB PDF) |
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| Higher strength insulation makes the product more durable and moisture resistant. The 25 psi (3,600 psf) makes product suitable for normal loading situations. Can be used in areas with expected live loads of 5psi (720 psf) and dead loads of 8.3 psi (1,195 psf). (see your Dow representative for specific load vs. product recommendations) |
STYROFOAM Square Edge |
English (204KB PDF) |
English (70KB PDF) |
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| Higher strength insulation makes the product more durable and moisture resistant. The tongue & groove edges provide a more continuous insulation layer and can help maintain a more continuous vapor retarder. The 25 psi (3,600 psf) makes product suitable for normal loading situations. Can be used in areas with expected live loads of 5psi (720 psf) and dead loads of 8.3 psi (1,195 psf). (see your Dow representative for specific load vs. product recommendations) |
STYROFOAM Tongue & Groove |
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