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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 warranties?

Two main types of warranties:
  • Manufacturer's Warranty: Offered by the manufacturer of the roofing materials and typically covers defects in the materials themselves, such as premature failure, curling, or discoloration. The length of the warranty can vary depending on the material and manufacturer, ranging from a few years to a lifetime.
  • Contractor's Warranty: Provided by the roofing contractor and covers the quality of the installation workmanship. This warranty typically covers leaks or other issues that arise due to improper installation and is usually for a shorter period, often 1 to 10 years.
Some manufacturers or contractors may offer additional warranties:
  • Extended Warranties: Options to extend the standard warranty period for an additional cost.
  • Specific Warranties: Covering specific aspects of the roofing system, such as ponding water resistance or wind uplift resistance.

What are the different types of commercial roofing systems?

There are several types of commercial roofing systems commonly used, each with its own advantages and disadvantages:
  • Built-Up Roofing (BUR): A traditional, multi-layered system consisting of alternating layers of asphalt and reinforcing fabric. It's known for its durability, waterproofing capabilities, and affordability.
  • Modified Bitumen Roofing: A single-ply system that uses asphalt-based sheets modified with polymers for enhanced flexibility, durability, and weather resistance. It's a versatile and cost-effective option for various commercial buildings.
  • Single-Ply Membrane Roofing: A modern system using a single layer of waterproof membrane, typically made from EPDM (ethylene propylene diene monomer) rubber, TPO (thermoplastic polyolefin), or PVC (polyvinyl chloride). These membranes offer excellent waterproofing, energy efficiency, and ease of installation.
  • Metal Roofing: Known for its longevity, durability, and fire resistance, metal roofing is a popular choice for commercial buildings. Available in various styles, including standing seam, corrugated, and metal shingles.
  • Spray Polyurethane Foam (SPF) Roofing: A spray-applied roofing system that forms a seamless, monolithic membrane, providing exceptional insulation, waterproofing, and energy efficiency.
  • Green Roofing: A system that involves covering the roof with vegetation, soil, and drainage layers. Offers environmental benefits, including reduced stormwater runoff, improved air quality, and energy efficiency.
Choosing the best roofing system depends on various factors, including your budget, building structure, climate, and specific needs. A qualified commercial roofing contractor can assess your roof and recommend the most suitable option.

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.

How do I choose the right roofing material for my commercial building?

Choosing the right roofing material for your commercial building requires careful consideration of various factors:
  • Building Type: The type of building, its size, and its intended use will influence the most suitable roofing material.
  • Roof Slope: The roof's slope or pitch will determine the type of roofing system that can be installed and the drainage considerations.
  • Budget: Different roofing materials have varying costs. Establish a clear budget for your project and consider the cost of materials, installation, and long-term maintenance.
  • Durability and Lifespan: Assess the durability and expected lifespan of different roofing materials, considering factors like weather resistance, UV resistance, and foot traffic.
  • Energy Efficiency: Choose materials with good insulation and reflectivity properties to reduce energy consumption and lower heating and cooling costs.
  • Aesthetics: Consider the appearance of the roofing material and how it complements the building's design and surroundings.
  • Fire Resistance: Prioritize fire-resistant materials, especially for buildings with specific fire safety requirements.
  • Maintenance Requirements: Consider the ongoing maintenance needs of different materials. Some materials require more frequent cleaning or repairs than others.
Consult with a qualified commercial roofing contractor for expert guidance on suitable roofing materials for your specific building and needs.

What are the different types of roof warranties?

Two main types of warranties:
  • Manufacturer's Warranty: Offered by the manufacturer of the roofing materials and typically covers defects in the materials themselves, such as premature failure, curling, or discoloration. The length of the warranty can vary depending on the material and manufacturer, ranging from a few years to a lifetime.
  • Contractor's Warranty: Provided by the roofing contractor and covers the quality of the installation workmanship. This warranty typically covers leaks or other issues that arise due to improper installation and is usually for a shorter period, often 1 to 10 years.
Some manufacturers or contractors may offer additional warranties:
  • Extended Warranties: Options to extend the standard warranty period for an additional cost.
  • Specific Warranties: Covering specific aspects of the roofing system, such as ponding water resistance or wind uplift resistance.

What are the different types of commercial roofing systems?

There are several types of commercial roofing systems commonly used, each with its own advantages and disadvantages:
  • Built-Up Roofing (BUR): A traditional, multi-layered system consisting of alternating layers of asphalt and reinforcing fabric. It's known for its durability, waterproofing capabilities, and affordability.
  • Modified Bitumen Roofing: A single-ply system that uses asphalt-based sheets modified with polymers for enhanced flexibility, durability, and weather resistance. It's a versatile and cost-effective option for various commercial buildings.
  • Single-Ply Membrane Roofing: A modern system using a single layer of waterproof membrane, typically made from EPDM (ethylene propylene diene monomer) rubber, TPO (thermoplastic polyolefin), or PVC (polyvinyl chloride). These membranes offer excellent waterproofing, energy efficiency, and ease of installation.
  • Metal Roofing: Known for its longevity, durability, and fire resistance, metal roofing is a popular choice for commercial buildings. Available in various styles, including standing seam, corrugated, and metal shingles.
  • Spray Polyurethane Foam (SPF) Roofing: A spray-applied roofing system that forms a seamless, monolithic membrane, providing exceptional insulation, waterproofing, and energy efficiency.
  • Green Roofing: A system that involves covering the roof with vegetation, soil, and drainage layers. Offers environmental benefits, including reduced stormwater runoff, improved air quality, and energy efficiency.
Choosing the best roofing system depends on various factors, including your budget, building structure, climate, and specific needs. A qualified commercial roofing contractor can assess your roof and recommend the most suitable option.

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.

How do I choose the right roofing material for my commercial building?

Choosing the right roofing material for your commercial building requires careful consideration of various factors:
  • Building Type: The type of building, its size, and its intended use will influence the most suitable roofing material.
  • Roof Slope: The roof's slope or pitch will determine the type of roofing system that can be installed and the drainage considerations.
  • Budget: Different roofing materials have varying costs. Establish a clear budget for your project and consider the cost of materials, installation, and long-term maintenance.
  • Durability and Lifespan: Assess the durability and expected lifespan of different roofing materials, considering factors like weather resistance, UV resistance, and foot traffic.
  • Energy Efficiency: Choose materials with good insulation and reflectivity properties to reduce energy consumption and lower heating and cooling costs.
  • Aesthetics: Consider the appearance of the roofing material and how it complements the building's design and surroundings.
  • Fire Resistance: Prioritize fire-resistant materials, especially for buildings with specific fire safety requirements.
  • Maintenance Requirements: Consider the ongoing maintenance needs of different materials. Some materials require more frequent cleaning or repairs than others.
Consult with a qualified commercial roofing contractor for expert guidance on suitable roofing materials for your specific building and needs.