DuraTherm Spa Covers Quality Features All hot tub covers are not created equally!
The Spa Depot proudly offers America's premier spa cover: DuraTherm. Light years ahead in terms of durability, quality of construction, and the energy savings that comes with superior insulation, these are the most beautifully crafted replacement spa covers you can buy. Get the full story on Energy Savings
Premium Vinyl Outer Skin
Our 30 oz. marine-grade vinyl is manufactured with higher levels of mildew inhibitors and special plasticizers to help keep it supple. It is the top grade and most expensive vinyl available.
Four (4) color-matched, reinforced tie down heavy-duty locking windstraps with latches, key and stainless mounting screws are provided for spa cover security & heat retention. No extra charge for heavy-duty windstraps!
Warning: Inferior brands have only 2 tie downs, a safety hazard which subjects the cover to wind damage and promotes heat loss.
Skirt & Gussets Quality touches that make a difference
The skirt (or apron) is meticulously sewn from two layers of vinyl and will be made as long or short as needed (minimum skirt length is 1-1/2") or we can make your cover with no skirt. High quality DuraTherm covers feature gusseted skirts, as pictured. (Gussets are carefully sewn sectional skirts, which appear as slits in the corners). Skirts made this way hang straighter, fit better, and have less tendency to bunch-up under the cover when setting it on the spa.
Important: Poorly-made covers use one piece continuous skirts without gussets. Requiring less sewing, they're cheaper to manufacture, but have inherent problems. If the skirt folds under the cover it prevents an adequate seal to the spa rim, resulting in wasted energy. Even more important, on hot days sunlight can cause extreme heat build-up under the skirting of covers without gussets, which can damage the spa's acrylic. Avoid hot tub covers without proper gussets.
Zippered Access to Insulating Core Rustproof - Commercial grade zipper
Two heavy-duty zippers (concealed below the hinge fold) run the full width of each side of DuraTherm covers. Simply unzip to inspect the core. Our insulating panels are accessible and removable, should replacement or cleaning ever be necessary.
Our standard covers feature 4" > 2.5" taper closed-cell aquatic grade virgin EPS insulating cores with better R-value and moisture resistance. Some cover makers use cheap construction-grade foam or taper down to a flimsy 2" thin-- not a good idea. Our Ultra and eMax model covers feature even thicker 5">3" taper foam cores with the highest strength and insulation density.
Note: Covers more than 5" thick are not recommended because they are too heavy and bulky for easy removal or use with most cover lifting devices. Covers thicker than 5" provide negligible insulating gains. Many other brands of spa covers use inferior, low-grade foam cores which will rapidly absorb moisture and quickly lose their R-value and strength. DuraTherm uses only aquatic-grade foam cores. For example, our 5">3" taper spa covers actually provide superior insulation, strength, and durability compared to an unwieldy 6">4" taper cover using cheaper construction-grade foam cores.
ZEROtex™ Advanced 6 Mil Polymer Core Liner Breakthrough in moisture & chemical resistance
A leading cause of spa cover failure and loss of R-value is water absorption into the insulating foam core. Our ZEROtex™ heat-welded core liner is 6 mils thick, a special chemical-resistant polymer produced expressly for DuraTherm. Superior in blocking moisture intrusion, ZEROtex™ polymer seals-out water vapor to maintain the core's R-Value much better than the ordinary liners (bread bag plastic) used by other spa cover manufacturers.
NOTE: Order the double-wrapped core option for even greater moisture protection.
Dual Heavy-Gauge Steel Reinforcement Not flimsy aluminum or thin metal
Dual 20-gauge galvanized steel C-channels provide reinforcement across the center hinge fold to prevent spa cover sagging, gaps and heat loss. We know from long experience that heavy-gauge steel is best, although more costly to fabricate.
Note: Many other cover makers use weak 22-24 gauge steel, or aluminum which will eventually begin to sag, causing heat loss around the cover's perimeter. Rainwater puddles then form, which causes more sagging. Galvanized steel channel is up to 2.6 times more rigid than aluminum, and 20-gauge steel is about twice as strong as thin 22-gauge. (Smaller gauge number indicates thicker metal.)
Energy Reflex - Option Energy Saving Heat Reflective Shield
Energy Reflex is a special metalized reflective shield. Installed inside, between the spa cover's foam core and the vapor barrier wrap, it acts like a heat-reflective mirror. Radiant heat, which would otherwise escape and be wasted, is reflected back down into the spa water. This reduces the load on your hot tub heater, and your wallet.
This inexpensive upgrade is a breakthrough which could pay for itself in reduced energy consumption all year.