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Commercial Roofing FAQs

Get answers to frequently asked questions about commercial roofing and connect with qualified commercial roofing contractors in UK.

What are the different types of roof drains?

Several types of roof drains are available, each with its design:
  • Conventional Drains: Simple drains with a strainer and a vertical drainpipe.
  • Siphonic Drains: Use the Venturi effect to create a vacuum that pulls water through the drain more rapidly, allowing for smaller drainpipes and reduced roof penetrations.
  • Scupper Drains: Openings in parapet walls or roof edges that allow water to drain off the roof.
A roofing contractor can help you determine the best type of drain for your commercial roof.

How do I choose the right type of roof access hatch?

Consider these factors when selecting a roof access hatch:
  • Roof Type: The type of roof (flat, sloped, metal, etc.) will determine the appropriate hatch style and material.
  • Size and Accessibility: Choose a hatch size that provides enough space for easy access and consider the location and surrounding obstructions for ease of use.
  • Usage: Determine how frequently the hatch will be used and for what purposes. This will help you select a hatch with the appropriate durability and features.
  • Safety Features: Prioritize hatches with safety features like handrails, non-slip surfaces, and locking mechanisms.
  • Energy Efficiency: If energy efficiency is a concern, choose a hatch with good insulation and a tight seal.
Consult with a qualified roofing contractor or a roof access hatch supplier to find the best option for your needs.

How do I prevent ponding water on my commercial roof?

Ponding water, the accumulation of water on a flat roof, can lead to:
  • Leaks
  • Structural damage
  • Premature roof deterioration
To prevent it:
  • Proper Design and Installation: Ensure your roof has a sufficient slope for proper drainage during the design and construction phase.
  • Regular Inspections and Maintenance: Inspect the roof regularly for clogged drains or debris buildup.
  • Repair Sagging Areas: Address any sagging or low spots on the roof, as they can trap water.
  • Tapered Insulation: Consider installing a tapered insulation system to create a gradual slope toward the drains.

What is the process for a commercial roof installation?

The commercial roof installation process generally involves the following steps:
  1. Assessment and Planning: The roofing contractor will assess your roof's condition, take measurements, discuss your needs and budget, and recommend a suitable roofing system.
  2. Permitting: The contractor will obtain the necessary permits from your local building department, ensuring compliance with building codes.
  3. Material Delivery: The roofing materials will be delivered to your site.
  4. Site Preparation: The contractor will prepare the work area, including setting up safety barriers, protecting surrounding property, and ensuring access for equipment.
  5. Removal of Existing Roof (if applicable): If replacing an existing roof, the old roofing materials will be carefully removed and disposed of properly.
  6. Roof Deck Preparation: The contractor will inspect and prepare the roof deck, making any necessary repairs or reinforcements to ensure a solid foundation for the new roof.
  7. Installation of Underlayment: A waterproof underlayment will be installed on the roof deck to provide an additional layer of protection against leaks.
  8. Installation of Roofing System: The new roofing system will be installed, following the manufacturer's specifications and local building codes.
  9. Flashing and Edging: Flashing will be installed around chimneys, vents, skylights, and other penetrations to prevent leaks. Edge metal will be installed along the roof's perimeter for a finished look and proper water drainage.
  10. Inspection and Cleanup: The contractor will conduct a thorough inspection of the completed roof to ensure proper installation and address any potential issues. They will then clean up the work area and remove any debris.

What are the different types of roof drains?

Several types of roof drains are available, each with its design:
  • Conventional Drains: Simple drains with a strainer and a vertical drainpipe.
  • Siphonic Drains: Use the Venturi effect to create a vacuum that pulls water through the drain more rapidly, allowing for smaller drainpipes and reduced roof penetrations.
  • Scupper Drains: Openings in parapet walls or roof edges that allow water to drain off the roof.
A roofing contractor can help you determine the best type of drain for your commercial roof.

How do I choose the right type of roof access hatch?

Consider these factors when selecting a roof access hatch:
  • Roof Type: The type of roof (flat, sloped, metal, etc.) will determine the appropriate hatch style and material.
  • Size and Accessibility: Choose a hatch size that provides enough space for easy access and consider the location and surrounding obstructions for ease of use.
  • Usage: Determine how frequently the hatch will be used and for what purposes. This will help you select a hatch with the appropriate durability and features.
  • Safety Features: Prioritize hatches with safety features like handrails, non-slip surfaces, and locking mechanisms.
  • Energy Efficiency: If energy efficiency is a concern, choose a hatch with good insulation and a tight seal.
Consult with a qualified roofing contractor or a roof access hatch supplier to find the best option for your needs.

How do I prevent ponding water on my commercial roof?

Ponding water, the accumulation of water on a flat roof, can lead to:
  • Leaks
  • Structural damage
  • Premature roof deterioration
To prevent it:
  • Proper Design and Installation: Ensure your roof has a sufficient slope for proper drainage during the design and construction phase.
  • Regular Inspections and Maintenance: Inspect the roof regularly for clogged drains or debris buildup.
  • Repair Sagging Areas: Address any sagging or low spots on the roof, as they can trap water.
  • Tapered Insulation: Consider installing a tapered insulation system to create a gradual slope toward the drains.

What is the process for a commercial roof installation?

The commercial roof installation process generally involves the following steps:
  1. Assessment and Planning: The roofing contractor will assess your roof's condition, take measurements, discuss your needs and budget, and recommend a suitable roofing system.
  2. Permitting: The contractor will obtain the necessary permits from your local building department, ensuring compliance with building codes.
  3. Material Delivery: The roofing materials will be delivered to your site.
  4. Site Preparation: The contractor will prepare the work area, including setting up safety barriers, protecting surrounding property, and ensuring access for equipment.
  5. Removal of Existing Roof (if applicable): If replacing an existing roof, the old roofing materials will be carefully removed and disposed of properly.
  6. Roof Deck Preparation: The contractor will inspect and prepare the roof deck, making any necessary repairs or reinforcements to ensure a solid foundation for the new roof.
  7. Installation of Underlayment: A waterproof underlayment will be installed on the roof deck to provide an additional layer of protection against leaks.
  8. Installation of Roofing System: The new roofing system will be installed, following the manufacturer's specifications and local building codes.
  9. Flashing and Edging: Flashing will be installed around chimneys, vents, skylights, and other penetrations to prevent leaks. Edge metal will be installed along the roof's perimeter for a finished look and proper water drainage.
  10. Inspection and Cleanup: The contractor will conduct a thorough inspection of the completed roof to ensure proper installation and address any potential issues. They will then clean up the work area and remove any debris.