Roof and Gutter De-icing

Prevent ice and snow buildup that can cause extensive damage to your roofs, gutters and downspouts. Read more to learn how to get heated gutters.

Freeze and thaw cycles create ice dams that can quickly damage or even destroy roof coverings, gutters and downspouts. Pooled water behind the dam may leak into the building, causing water damage, or climb over the ice-filled gutter, forming icicles. The resulting water damage to your home’s interior can be many times more expensive to repair than the roof or gutter itself.

How do roof de-icing cables and gutter heating cables work?

Warmup Roof & Gutter De-icing Cables offer the best solution to prevent these dangerous ice dams and icicles. They provide a continuous drain path for melted ice and snow from the roof through the gutter and downspout. And by using an automated snow and ice melting control, the cables will operate only when you need it, minimizing operating costs.

Versatile, reliable and cost-effective, these cables are the effective answer for roof and gutter de-icing applications.

How do I calculate the total amount of roof heating cable and gutter heating cable needed?

 Roof Line
Length of roofline to de-ice = …ft
Zig-Zag on roof every 2ft and 2ft up/down
= roofline length * 2 = …ft
(Length x 2) x # of downspouts = …ft
(Add 3ft for in-ground spouts)
Add cable length for valleys (up/down)
Add cable length for dormers (around dormer)

What is the difference between the Self-Regulating Cable and the Constant Wattage Plug-in Cable Kits?

Warmup Self-Regulating Cable (NAMSR)

Self-regulating wires melt snow and ice to keep a drain path for water to flow freely away from the house from the roof and gutters.The self-regulating frost protection cables also work automatically to protect your pipes from freezing, bursting and causing damage from flooding. Suited for commercial use and residential with heavy snow fall.

Warmup Constant Wattage Plug-in Cable Kits (WRGH)

This cable prevents ice that can cause extensive damage to pipes. The 5.5W per linear foot, twin conductor heating cable, creates drain paths needed, enabling snow and ice to melt and drain freely. The resistance heating element has Fluoropolymer as a primary insulation covered with metal sheathing. It is UV resistant and environmentally friendly, making it ideal for outdoor use. Suited for light residential applications.

A full range of controllers and accessories is available, guaranteeing the optimal solution for all outdoor heating.

NAMSR Self-Regulating Spools– 120V (250ft Spools)

Length (ft) Code Watts Volts
250 NAMSR-3W-120-250 3/in 120
250 NAMSR-5W-120-250 5/in 120
250 NAMSR-8W-120-250 8/in 120

NAMSR Self-Regulating Spools– 240V (250ft Spools)

Length (ft) Code Watts Volts
250 NAMSR-3W-240-250 3/in 240
250 NAMSR-5W-240-250 5/in 240
250 NAMSR-8W-240-250 8/in 240

NAMSR Self-Regulating Spools– 120V (1,000ft Spools)

Length (ft) Code Watts Volts
1000 NAMSR-3W-120-1000 3/in 120
1000 NAMSR-5W-120-1000 5/in 120
1000 NAMSR-8W-120-1000 8/in 120

NAMSR Self-Regulating Spools– 240V (1,000ft Spools)

Length (ft) Code Watts Volts
1000 NAMSR-3W-240-1000 3/in 240
1000 NAMSR-5W-240-1000 5/in 240
1000 NAMSR-8W-240-1000 8/in 240

NAMSRK Self-Regulating Kits

Length (ft) Code Watts Volts
6 NAMSRK-6FT with plug 5/lin 120
12 NAMSRK-12FT with plug 5/lin 120
18 NAMSRK-18FT with plug 5/lin 120
24 NAMSRK-24FT with plug 5/lin 120
50 NAMSRK-50FT with plug 5/lin 120
75 NAMSRK-75FT with plug 5/lin 120
100 NAMSRK-100FT with plug 5/lin 120


Code Length in feet Wattage Voltage
WRGH-150-1 30 150 120
WRGH-300-1 60 300 120
WRGH-400-1 80 400 120
WRGH-500-1 100 500 120
WRGH-600-1 120 600 120
WRGH-800-1 160 800 120
WRGH-1000-1 200 1000 120
WRGH-1200-1 240 1200 120


Code Description
TAPE-AL Aluminum foil tape for self-regulating cable. Sold in 180ft roll
HANGER-KIT Downspout hanger kit for self-regulating cable and Roof/Gutter heaters
NAM-POWER-KIT Power connection kit for self-regulated cable. Includes 2 warning labels and an End Seal Kit
ROOF-CLIP Metal roof clips. Sold 50/pkg
NAM-SPLICE-KIT Spice/Tee kit for self-regulated cable
SB-190 Adhesive for Warmup Roof Clips
NAM-END-KIT End Seal Kit for Self-Regulating Cable
CRDS-15-GFI 6ft lead with GFCI 3-prong molded plug, NEMA 5-15, 15 amp, 14/3
SPEEDFIT-SPLICE In-line splicing box for fast and weathertight connections in the field
SPEEDFIT-TEE 3-Way T-Splice box for fast and weathertight connections in the field

Not sure which cable is best for your project?

You will also need …

For NAMSR Cable Spools:

  • Roof clips (ROOF-CLIP)
  • Adhesive for Warmup roof clips (SB-190)
  • 6ft lead with GFCI 3-prong molded plug (CRDS-15-GFI)
  • or Power Kit (NAM-POWER-KIT)

WRGH kits come with kits and plug

  • Add optional WRS-2 Temperature Controller

Roof and Gutter De-icing Controller

Find the correct controller for your roof and gutter de-icing system.

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