Drainage Solutions

Hydrotech's Thermaflo® - Protection, Drainage & Insulation

Thermaflo Installation of Thermaflo

Thermaflo® combines the excellent thermal protection of STYROFOAM® insulation with efficient drainage and top-notch protection to the waterproofing membrane - all in a single product. This 3 in 1, multi-purpose product is particularly well suited to below grade vertical foundation walls.

Advantages...

High compressive strength can withstand the pressure imposed by soil over time, while simultaneously maintaining high drainage rates.
Drainage channels are protected from soil particle entry and clogging due to overlapping filtration fabric at all edges.
Economical, fast, straightforward installation, eliminates the need to install a separate protection layer and a drainage course product.

Composition and Materials...

Thermaflo® panels are 2 ft. x 8 ft. Dow STYROFOAM® extruded polystyrene foam insulation with horizontal and vertical drainage channels on one side, covered by spun-bonded polyester fabric. Tongue and groove edges along all sides allow each board to be interlocked during installation, creating a continuous thermal and drainage barrier.

Types...

Available in three types, each with a choice of thickness, Thermaflo® is selected according to the anticipated amount of pressure exerted by the soil or backfill and by the desired thermal value.

Type 2160 has a compressive strength of 2160 psf, and is sold in three thicknesses: 1 inch (R=4.4), 1.25 inches (R=6.9) and 2.25 inches (R=10.6). Type 2160 has a flow rate of 9.5 gpm/ft.

Type 3460 carries a higher compressive strength of 3460 psf, and is sold in thicknesses of 1.5 inches (R=6.9) and 2.25 inches (R=10.6). Type 3460 has a flow rate of 12gpm/ft.

Type 5180 has the highest compressive strength of 5180 psf and also comes in two thicknesses: 1.5 inches (R=6.9) and 2.25 inches (R=10.6). Type 5180 has a flow rate of 12 gpm/ft.

(Flow rates are per ASTM D 4716, with a load of 500 lb./s.f. Also, a 3:1 design factor is recommended to prevent compressive creep.)

Top of Page

American Hydrotech, Inc., 303 E. Ohio Street, Chicago, IL 60611, U.S.A.

Phone: 800-877-6125 Fax: 312-661-0731