Optimize Your Roof Design with Roof Blocks for Piping

Installing piping and mechanical equipment on commercial rooftops can be a challenge. Rooftop support blocks, also known as pipe support blocks or pipe pier blocks, provide an ideal solution for safely and securely elevating gas lines, electrical conduits, HVAC equipment, solar panels and other rooftop structures. With the right roof blocks, you can optimize your roof design for functionality, while protecting its integrity.

Roof blocks raise piping and equipment above the roof surface, preventing damage from pooled water, snow loads, and other weather exposure. They also stabilize equipment and prevent bouncing or shifting that could compromise connections. By evenly distributing weight, blocks prevent localized stress that leads to cracks and leaks.

Types of Roof Blocks for Different Applications

There are many types of roof blocks available to suit various roofing systems, equipment needs and load requirements:

• Universal blocks with adjustable heights to accommodate different pipe sizes.
• Low profile blocks for limited space under solar panels or other equipment.
• High density blocks for heavy mechanical loads up to 5,000 lbs.
• Sloped blocks for angled roofs.
• Insulated blocks to prevent condensation and energy loss.
• Custom blocks for unique shapes, sizes or finishes.

The most common material for durable, weather-resistant roof blocks is reinforced concrete. Other options include plastic, fiberglass and metal composites. Galvanized steel bases provide extra stability on uneven roofing.

Roof Blocks for Plumbing and Vent Pipes

Roof blocks securely support vent stack assemblies above the roofline. This includes plumbing vents, drain pipes and flue gas exhaust. Elevating pipes protects from freezing, cracking and leaks. Proper height provides the required slope and drainage.

HVAC Equipment, Ducting and Refrigerant Lines

Heating, ventilation and air conditioning (HVAC) equipment on roofs relies on blocks for a stable installation. This includes air handlers, condensers, evaporator coils, exhaust fans, ducting and insulation. Blocks absorb vibration and evenly distribute weight loads across roof joists.

Electrical Conduits and Solar Panel Connections

Roof blocks safely raise electrical conduit, junction boxes and other connections above water exposure. Solar panel mounts are also elevated on blocks to allow wire and plumbing access underneath. Sloped blocks provide optimal solar angle.

Benefits of Using Roof Blocks for Piping and Equipment

Compared to mounting piping or equipment directly on the roof, blocks provide many advantages:

• Prevent leaks by eliminating water pooling and damage from weather, snow/ice accumulation and foot traffic.
• Absorb vibration and noise from operating equipment like air condensers and exhaust fans.
• Allow the roof to expand and contract naturally without stressing connections.
• Provide easy access to conduits, wiring and plumbing under solar panels or HVAC units.
• Enable level equipment installation on uneven rooftops.
• Qualify for insurance discounts by complying with roofing best practices.

Roof Blocks are Code Compliant and Energy Efficient

Most building codes require mechanical equipment to be elevated above the roof with a permanent base. Roof blocks meet code compliance. Elevating systems also improves energy efficiency by:

• Allowing air circulation to cool condensers.
• Keeping HVAC coils free of snow/ice buildup.
• Preventing heat loss through uninsulated roofing.

Choosing the Right Roof Blocks

Consider the following when selecting roof blocks:

Block Material

Reinforced concrete blocks provide excellent durability and stability. Plastic or composite blocks are lighter but still weather-resistant. Use galvanized or stainless steel bases for strength.

Weight Load Capacity

Ensure the blocks are rated to safely support piping, equipment and other anticipated loads. A structural engineer can recommend capacity requirements.

Block Height

Standard block heights range from 3" to 28". Consider minimum pipe slopes and access needs. Adjustable blocks allow height modifications in the field.

Roof Attachment

Blocks may bolt through the roof, adhesively bond, or be weighted. Attachment must withstand all wind, seismic and loading conditions.

Placement and Spacing

Space blocks adequately to distribute weight across multiple roof joists or rafters. Follow manufacturer specifications and building code spacing requirements.

Flashing and Sealing

Flashing seals off roof penetrations. Use compatible and durable materials like EPDM, PVC membrane, or galvanized steel.

Proper Installation

Careful installation ensures roof blocks provide safe, long-term equipment support. Key steps include:

• Prepare the roof area by removing loose gravel or debris.
• Outline the block locations following the approved layout.
• Cut holes for any through-roof attachments.
• Set and level the blocks checking for symmetry.
• Bolt blocks together and to the roof as specified.
• Install weatherproof flashing sealed with adhesive.
• Run any piping, conduit and equipment as supported.
• Do not exceed rated weight capacities.

Consult manufacturer instructions for block-specific installation procedures. Any roof penetrations should be completed by qualified roofing contractors to maintain integrity and prevent leaks.

Inspecting and Maintaining Roof Blocks

Regularly check roof blocks and flashing for any signs of deterioration or looseness. Look for:

• Loose or missing hardware, fasteners or adhesive.
• Cracks, spalling or crumbling concrete.
• Corrosion, rust or damage on steel bases.
• Split, warped or degraded plastic blocks.
• Clogged drain holes or pathways.
• Gaps, tears, lifting or cracks in flashing.

Make any necessary repairs to blocks and flashing to prevent leaks or hazards. Keep blocks free of debris and vegetation. Re-secure any loose piping, conduits or equipment as needed.

Failing to properly support mechanical equipment and piping systems on rooftops leads to leaks, ice dams, condensation issues and even collapse. Protect your roof for the long run with durable, code-compliant roof blocks tailored to your equipment loads and layout. With routine inspection and maintenance, quality roof blocks provide a secure pedestal for elevated rooftop utilities and appliances.