Not Sure Where to Start?
Send photos of your roof and ice problem. Our design team will help identify your next steps—within one business day.
Photos and measurements are optional. Start with what you have; “not sure” is welcome.
A useful sizing plan starts with accurate measurements and the manufacturer’s instructions. Use this checklist to prepare for selecting a Heatizon GutterMelt® configuration.
1. Measure the Gutter Runs
Record the length of each gutter section separately. Note changes in direction, roof sections, gutter style, and any areas where the installation may have special constraints.
2. Map Downspouts and Drainage Paths
Mark each downspout, its approximate height, and where it discharges. Note locations where ice or blocked drainage has been a recurring problem. Do not assume that one cable layout fits every gutter and downspout.
3. Note Roof-Edge Conditions
Describe the roof edge and the areas you want the system to serve. Roof geometry, exposure, local weather, and existing insulation and ventilation conditions can affect the overall ice-management plan.
4. Confirm Product and Electrical Requirements
Use the exact product documentation to confirm cable configuration, permitted applications, electrical load, controls, circuit requirements, and installation restrictions. Have a qualified electrician assess electrical requirements when appropriate. This guide does not replace the manufacturer’s sizing instructions.
How Do Overhangs, Valleys and Downspouts Change Cable Length?
Measure the horizontal distance from the roof edge to the exterior wall and the roof slope. The manual’s sloped-roof layout extends cable 6–12 inches inside the exterior wall line and each loop at least 2–3 inches into the gutter. A wider overhang changes loop height and cable used per foot of eave; gutter length alone cannot size the system.
For valleys, the manual calls for a double run extending at least two-thirds of the way up the valley. Include the gutter route, downspout route and discharge point in the same plan. Page 16 recommends two runs for gutter and downspout applications; page 8 addresses supports and continuation into a heated area or below the frost line for below-grade drains. Use the applicable roof diagram and project-specific layout.
| Design input | What to record |
|---|---|
| Eave geometry | Eave length, overhang depth, slope and exterior wall location |
| Valleys and intersections | Lengths and drainage routes; include the required return runs |
| Downspouts | Height, support points and where water discharges |
| Electrical design | Exact model, available voltage, breaker rating and lowest startup temperature |
Source: Heatizon GutterMelt SR Design and Installation Manual, 2017 edition, pages 7–8. Technical reference reviewed October 22, 2026. Follow the label and current instructions for the supplied model.
Send a sketch and photos to a design professional. We will review the complete route, mounting and circuit limits before selecting cable lengths.
Our Heat Cable System Design Checklist
- Project city, state and ZIP code; property type
- Where ice forms and how meltwater currently drains
- Approximate gutter lengths, downspout heights and discharge locations
- Eave overhangs, valleys, roof slope and roof/gutter materials, where known
- Photos or a simple sketch; existing cable and controls, if any
- Available supply voltage and electrical information, if known
- Whether you need design help, installation or replacement of an existing system
Ask Us About Your Project
Start with what you know; approximate measurements and “not sure” answers are welcome. Photos and technical details are optional. Send your design checklist to request a nationwide estimate. We respond within 1 business day. Cable length must be checked against the complete drainage layout, exact product instructions and circuit limits.
Product and Technical Resources
- GutterMelt product information at Warmquest
- GutterMelt SR technical downloads
- GutterMelt roof and gutter deicing FAQs
Talk to a Heat Cable Design Professional
Request an estimate or help with cable selection, drainage layout, circuit capacity and controls. We welcome project inquiries nationwide. Based in Murray, Utah, our team serves communities across the Wasatch Front. Installation availability beyond our core service area is confirmed by project location and scope.