Best Roof Supports for Conduit: Durable, Non-Penetrating Options for Rooftop Installations
The top choices compile robust, non-penetrating roof supports designed to secure conduit, piping, and HVAC lines on rooftops. This guide helps buyers choose the right block or sleeper curb based on load needs, material, and roof type. Ideal buyers include residential installers, commercial contractors, and DIY roof projects seeking long-lasting, weather-resistant support blocks.
Summary of chosen products:
| Product | Capacity | Material | Best For | |
|---|---|---|---|---|
| SUPPLYGIANT Rooftop Support Block (1,500 lbs) | 1,500 lbs | Recycled rubber + galvanized steel | Heavy-load rooftop equipment, conduit, solar, HVAC | Heavy; handle with care during installation |
| Newhouse Electric RTS14-10 Rooftop Block | 650 lbs | Galvanized steel strut + UV-resistant rubber | Moderate-conduit runs on sleeper curbs | Check compatibility with existing sleepers |
| Newhouse Electric RTS14-5 Rooftop Block | 500 lbs | Galvanized steel strut + UV-resistant rubber | Light to moderate conduit runs | Not ideal for very heavy loads |
| 4-Pack PVC Rooftop Sleeper Blocks | Depends on use; PVC blocks for light to moderate loads | PVC | No-penetration installs for small lines | Less durable in extreme heat; ensure UV exposure suitability |
| Novabright 8 Pack PVC 6″ Blocks | Light to moderate loads per block | PVC | Fast, non-penetrating installations | Multiple blocks required for larger runs |
SUPPLYGIANT Rooftop Support Block (1,500 lbs)
Features: Heavy-Duty Rooftop Support Block with 1,500 lbs load capacity; tough, UV-resistant rubber base with a pre-galvanized steel strut; designed for piping, conduit, ductwork, HVAC systems, solar panels, and rooftop walkways. Vibration-dampening properties help protect roof membranes. Weight is about 4.25 lbs for easier handling.
Best for: Commercial or large-scale installations needing maximum load support, such as HVAC ductwork or heavy conduit runs. Choose this if you require high-load stability and long-term membrane protection.
Caution: Ensure the base footprint matches your roof layout to avoid under-support or misalignment. Verify compatibility with your sleeper curb or mounting plan.
Newhouse Electric RTS14-10 Rooftop Block
Features: 650-lb load capacity; 14-gauge 1.625-inch galvanized steel strut for securing conduit; UV-resistant, 100% recycled rubber in roofing material. This block is a robust sleeper curb replacement for mid-range installations.
Best for: Projects needing a balance of strength and ease of installation for moderate conduit or piping runs. Better for smaller commercial or residential rooftop jobs where weight is a factor.
Caution: Not suitable for very heavy loads; pairing with additional supports may be necessary for large-scale systems.
Newhouse Electric RTS14-5 Rooftop Block
Features: 500-lb load capacity; 14-gauge steel strut with a galvanized 1.625-inch profile; UV-resistant rubber roofing material made from 100% recycled rubber. Practical for lighter conduit runs and smaller sleeper curb replacements.
Best for: Small residential or light commercial rooftops with modest conduit or pipe support needs. Choose this if weight is a primary constraint and installations are routine.
Caution: Limited load capacity means avoid using for heavier HVAC or large plumbing runs without additional support.
4-Pack PVC Rooftop Sleeper Blocks
Features: Pre-cut to 6 inches; versatile use for water lines, gas pipes, electrical conduit, metal pipes, condensate lines, and walkway planks. No roof penetration required with appropriate guides or clamps (not included).
Best for: Quick, non-penetrating installations on rooftops where multiple small runs are needed and PVC is preferred for cost and corrosion resistance.
Caution: May require additional supports for heavy or irregular loads; ensure compatibility with other mounting hardware.
Novabright 8 Pack PVC 6″ Blocks
Features: Pre-cut 6-inch size; sturdy PVC construction with high rigidity; dimensions around 6 x 3.5 x 4.88 inches; designed for elevating small water lines, gas pipes, electrical conduit, metal pipes, condensate lines, and even as spacers for walkway planks.
Best for: Large installation projects requiring multiple blocks with consistent sizing and non-penetrating capabilities. Good for multi-pipe runs and phased rooftop work.
Caution: PVC blocks may have limited heat resistance; use in accordance with roof membrane guidelines and avoid direct, extreme heat exposure for extended periods.
USA Made BULLKE Mini Rooftop Pipe Support 4 Pack
Features: 4-pack of 6″ x 6″ x 3″ blocks; 300 lbs capacity per block; UV resistant and American-made from 100% recycled plastic. Suitable for conduit, PVC, metal pipes, and other small to mid-size runs.
Best for: Eco-conscious buyers seeking durable, US-made PVC solutions with reliable capacity for lighter to mid-range rooftop piping or conduit.
Caution: Lower capacity than some larger blocks means plan loads across multiple blocks for heavier runs.
Buying Guide
What load capacity do I need?
Assess the total weight of conduits, pipes, and equipment. Heavier loads require higher-capacity blocks (e.g., 1,000–1,500 lbs) and possibly multiple supports to distribute weight evenly.
Material considerations
Metal-strut blocks with rubber bases offer strong support and vibration dampening. PVC blocks are cost-effective and corrosion-resistant but may be less durable in extreme heat. Rubber and recycled rubber bases provide roof membrane protection and long-term resilience.
Roof type and installation method
No-penetration PVC options reduce roof damage risk, but ensure proper placement and use of non-included guides or clamps. For sleeper-curb replacements, galvanized steel and UV-resistant rubber components tend to perform best in harsh weather.
Size and footprint
Consider footprint and dimensions. Larger blocks cover more area and distribute weight, but may be less compatible with tight roof spaces. Pre-cut options save time on measurement and cutting, especially for uniform projects.
Installation and compatibility
Match product blocks to your sleeper curb or mounting hardware. Some products are designed for quick attachment, while others require additional hardware not included in the package.
Durability and maintenance
UV resistance, weathering, and vibration dampening extend roof membrane life. Choose materials with proven UV resistance and rugged construction for rooftop environments.
Practical decision framework
- For very heavy loads and industrial use: prioritize high-capacity blocks (1,000–1,500 lbs) with metal struts and rubber bases.
- For mid-range residential installs: RTS-series or comparable 650–500 lb blocks offer a balance of strength and ease of use.
- For quick, non-penetrating setups: PVC blocks, especially pre-cut 6″ options, provide rapid deployment with minimal roof impact.
FAQ
- What is a sleeper curb block? A sleeper curb block is a non-penetrating support that lifts and secures rooftop lines without drilling into the roof membrane.
- Can these supports handle HVAC equipment? Yes, but match the product capacity to the total weight of the HVAC units and ductwork.
- Are PVC blocks weatherproof? PVC blocks resist moisture and many chemicals, but check UV resistance and temperature ratings for your climate.
- Do I need additional hardware to install PVC blocks? Some installations require guides, clamps, or tab tape not included with the blocks.
- Is a high-load option always better? Not always; choose based on actual load requirements and roof layout to avoid overbuilding.
- Are these products compliant with local building codes? Check local codes and ensure compatibility with your existing sleeper curb system and roof material.