Hot Tar Roofing – Everything You Need to Know

Looking for a durable, high-quality, and cost-effective roof? Knowing how hot tar is applied to built-up roofing systems gives you insight into the strength and longevity these roofing systems offer.

Hot tar or hot mop roofing with molten tar as an adhesive for roofing material

New Image Roofing Atlanta gathered information defining hot tar roofing, its benefits, and why finding a certified hot tar installer is crucial.

What Is Hot Tar Roofing

Used primarily in built-up roofing (BUR) systems and modified bitumen roofing, hot tar plays a vital role in protecting commercial, industrial, and residential buildings from the elements and extending the lifespan of roofing structures. However, applying hot tar requires specialized skills and knowledge, making it essential for roofers to be certified and insured specifically for working with this material.

Hot tar or hot mop roofing uses a torch to maintain elevated tar tempuratures

Hot tar roofing (molten asphalt or bitumen application) creates a waterproof membrane on a low-slope roof surface. The process begins by heating the asphalt to a liquid state, which is then applied to the roof substrate using mopping, spraying, or pouring methods. Multiple asphalt-saturated felt (or fiberglass) reinforcement layers are alternated with hot tar to build a durable roofing system.

Hot Tar Roofing Systems Benefits

Hot tar roofing systems offer several advantages that make them popular for commercial and industrial applications. Consider the following aspects:

Durability – Hot tar roofing provides excellent resistance to water infiltration, UV radiation, and thermal expansion and contraction, making it highly durable and long-lasting.

Versatility – Hot tar can adhere to various roofing substrates, including concrete, metal, wood, and insulation boards, making it suitable for multiple roofing configurations and designs.

Cost-Effectiveness – Compared to other roofing materials, hot tar roofing systems are relatively affordable to install and maintain, offering excellent value for property owners over the long term.

Seamless Application – Hot tar’s liquid nature allows for seamless application and tight integration with roofing components, minimizing leak and water damage risks.

Certification and Insurance

While hot tar roofing systems offer numerous benefits, their installation requires specialized skills, equipment, and safety precautions. Roofers must be certified and insured (specifically for working with hot tar). Here’s why:

Hot tar or hot mop roofing includes the application of molten tar to roofing materials

Technical Expertise – Installing and repairing hot tar roofing systems requires a thorough understanding of roofing principles, materials, and techniques. Certified roofers undergo extensive training and certification programs to develop the necessary skills and knowledge for working with hot tar safely and effectively.

Safety Compliance – Working with hot tar poses significant safety risks, including burns, fires, and fume inhalation. Certified roofers receive training in safety protocols, hazard awareness, and emergency procedures to mitigate these risks and ensure a safe working environment for themselves and others on the job site.

Note: Hydrogen sulfide can be produced from hot roof tar. However, the levels produced are not high enough to affect building occupants. Only levels inside an enclosed asphalt kettle may be high enough to pose severe health risks.

Quality Assurance – Hiring a certified and insured roofer for hot tar installation or repairs provides quality work and adherence to industry standards and best practice assurances. Certified roofers are held to high professional standards and committed to delivering superior results that meet or exceed client expectations.

Liability Protection – Roofing contractors who are certified and insured carry liability insurance coverage to protect against unforeseen accidents, property damage, and personal injury claims. This safeguards property owners from financial liability if accidents or mishaps occur during the roofing process.

Manufacturer Warranty Compliance – Many roofing material manufacturers require installation by certified contractors to validate product warranties. Hiring certified roofers ensures that your hot tar roofing system is installed according to manufacturer specifications, preserving warranty coverage and protecting your investment over time.

Finding a Certified and Insured Roofer

When selecting a roofing contractor for hot tar installation or repairs, it is essential to research and vet potential candidates carefully. Here are some tips for finding a certified and insured roofer:

Check Credentials – Verify the roofing contractor is certified by reputable industry organizations, like the National Roofing Contractors Association (NRCA) or the Roofing Contractors Association of America (RCAA).

Review Insurance Coverage – Ensure that the roofing contractor carries liability insurance and workers’ compensation coverage to protect against property damage and injuries on the job site.

Tip: Reputable roofing contractors will provide a COI (certificate of Insurance) for your roofing project upon request.

Request References – Ask for references from past clients and review online reviews and testimonials to gauge the roofer’s reputation and track record of quality work.

Get Written Estimates – Obtain detailed written estimates from multiple roofing contractors, including the scope of work, materials, timeline, and concise pricing breakdown. Compare proposals carefully before making an informed decision.

Ask About Warranty – Inquire about materials and installation warranty coverage, and ensure the roofing contractor stands behind their work with a written warranty or guarantee.

Hot tar or hot mop roofing uses heated tar to adhere roof materials

Hot Tar Roofing Systems

In this article, you discovered defining information about hot tar roofing, its benefits, and how to vet certified and insured roofers.

Hiring a certified and insured roofer (specifically trained in working with hot tar) is essential to ensure the roofing system’s safety, quality, and longevity.

Failure to understand hot tar roofing applications and properly vet roofing contractors may leave you with a poorly installed roof with a significantly reduced lifespan.

Sources:
hsrm.umn.edu/department-environmental-health-safety/industrial-hygiene/indoor-air-quality/roofing-odors
nachi.org/roofs.htm
asphaltroofing.org/recommendations-regarding-built-up-roofing-asphalt

  New Image Roofing Atlanta
 

    2020 Howell Mill Rd NW Suite 232
    Atlanta, GA 30318
    (404) 680-0041
 
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Low-Slope Roofing Systems in Hot Summers – When to Call Your Roofer

Prevent sweltering summer heat from damaging your low-slope (flat) roofing system. Understanding how summer heat adversely affects low-slope roofing will help you take steps to prevent cracking, peeling, leaks, and structural water damage.

Low slope roof summer protection includes annual inspections and repairs

New Image Roofing Atlanta gathered information about how extreme summer temperatures can damage your low-slope roofing system and what you can do to protect and preserve it.

Low-Slope Roofing System Vulnerabilities in Hot Summers

Low-slope roofing systems (TPO, EPDM, PVC, BUR, Duro Last) are inherently more vulnerable to issues during hot summers. The intense heat, prolonged exposure to UV radiation, and thermal expansion and contraction can contribute to multiple challenges, including the following:

1. Thermal Expansion and Contraction – High temperatures can cause roofing materials to expand, and during the cooler evenings, they contract. This constant thermal cycling can lead to stress on the roofing materials, potentially resulting in cracking, warping, and other structural issues.

2. UV Radiation Damage – Prolonged exposure to the sun’s UV radiation can accelerate the aging of roofing materials. UV rays can cause shingles, membranes, and other components to deteriorate, lose flexibility, and become more susceptible to damage.

3. Heat Absorption – Low-slope roofs, especially those with dark-colored surfaces, can absorb and retain heat. Excessive heat absorption can lead to elevated indoor temperatures, increased energy costs, and potential damage to roofing materials over time.

dark roofing material in hot summer weather

4. Membrane Degradation – Membrane roofing systems, commonly used in low-slope roofs, may experience degradation due to high temperatures. This can result in reduced waterproofing effectiveness and an increased risk of leaks.

5. Flashing and Sealant Issues – Extreme heat can cause flashing and sealants to soften and lose their effectiveness. This compromises the waterproofing capabilities of the roof, leading to potential leaks and water infiltration.

Tip: A roof maintenance program with annual inspections allows for early issue detection and repair.

Low-Slope Roofing System Protection in Hot Summers

Protecting low-slope roofing systems in hot summers requires a proactive approach. By understanding your roof’s vulnerabilities and implementing preventive measures, you can safeguard your property from potential severe damage. Consider the following measures:

1. Reflective Roofing Materials – Choose reflective roofing materials with a high solar reflectance index (SRI). Light-colored or reflective surfaces can help minimize heat absorption, reducing the impact of high temperatures on the roof.

Reflective roof material is recommended for hot summers

2. Cool Roof Coatings – Apply cool roof coatings to existing low-slope roofing systems. These coatings have reflective properties that can deflect sunlight and reduce heat absorption. Cool roof coatings also provide additional protection against UV radiation.

3. Proper Insulation – Adequate insulation beneath the roof can help regulate indoor temperatures and reduce heat transfer to the building’s interior. Proper insulation contributes to energy efficiency and minimizes the strain on cooling systems.

4. Enhanced Ventilation – Improve roof ventilation to facilitate air circulation and reduce heat buildup. Adequate ventilation helps dissipate trapped heat and minimizes the risk of thermal stress on roofing materials.

5. Regular Roof Inspections – Schedule regular inspections to identify and address potential issues before they escalate. Look for signs of wear, damage, or deterioration in roofing materials, flashings, and sealants.

6. Shade Structures – Consider installing shade structures, like awnings or pergolas, to shield your low-slope roof from direct sunlight. These structures relieve extreme heat and offer additional protection against UV radiation.

7. Roof Coatings for Membranes – For membrane roofing systems, apply coatings designed to protect against UV radiation and enhance durability. These coatings create a barrier that shields the membrane from the harmful effects of the sun.

8. Solar Reflective Shingles – If your low-slope roof is shingled, opt for solar reflective shingles with reflective granules. These shingles are designed to reflect more sunlight and absorb less heat, helping to maintain a cool roof.

Tip: Severe summer storms can cause extreme temperature fluctuations. When such a storm passes, schedule a roof inspection to identify and repair any damages.

When to Call Your Roofer

Low slope roofing repairs and maintenance in hot summer weather

1. Visible Signs of Damage – If you notice visible signs of damage like cracked or warped shingles, blistering membranes, or deteriorating flashings, it’s time to call your roofer. Prompt attention to visible damage can prevent further issues.

2. Leakage and Water Infiltration – Water leaks inside the building during hot weather are urgent issues that require immediate attention. If you observe water stains on ceilings or walls, contact your roofer promptly to identify and address the source of the leaks.

3. Flashing and Sealant Concerns – If you have concerns about the condition of flashings and sealants on your low-slope roof, consult with your roofer. These components are critical in maintaining a watertight seal, and any issues should be addressed promptly.

4. Structural Integrity Issues – Call your roofer when you suspect structural integrity issues (sagging, bowing, or ponding). Structural concerns pose significant risks and should be addressed promptly to prevent further damage.

5. Regular Maintenance and Repairs – Schedule regular maintenance with your roofer, especially after periods of extreme weather. Professionals can identify potential issues early on and recommend preventive measures to protect your low-slope roof.

For more information about commercial and residential roof maintenance, visit newimageroofingatlanta.com/roofing-services/roof-maintenance

Heat Stress on Low-Slope Roofs

In this article, you discovered how low-slope roofs are vulnerable and can be damaged by brutal summer heat, measures to protect them, and when to call your roofer.

Understanding how low-slope roof membranes react to summer heat and extreme temperature variations allows you to install preventive measures to ensure your roof’s integrity.

Neglecting your low-slope roof through the summer months can lead to leaks and severe structural damage from cracks and fissures in your roof membrane.

Sources:
ncbi.nlm.nih.gov/pmc/articles/PMC9003350
gsa.gov/real-estate/historic-preservation/historic-preservation-policy-tools/preservation-tools-resources/technical-procedures/types-of-flat-roofing-and-factors-affecting-its-deterioration

  New Image Roofing Atlanta
 

    2020 Howell Mill Rd NW Suite 232
    Atlanta, GA 30318
    (404) 680-0041
 
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Low-Slope Roofing System Winter Protection

Avoid letting freezing temperatures, snow, and ice severely damage your low-slope (flat) roof in winter. Knowing how to protect your flat roofing system during the winter months will help extend its lifespan and avoid costly repairs.

Low slope roof winter protection includes annual inspections and repairs

New Image Roofing Atlanta gathered information on how your commercial or residential low-slope roofing system is vulnerable to winter weather, the actions you can take to protect it, and when you should call your roofer.

Low-Slope Roofing System Vulnerabilities

Low-slope or flat roofing systems (TPO, PVC, EPDM, BUR, Duro-last) are inherently more susceptible to issues during freezing weather. Unlike steep-slope roofs that allow snow and ice to naturally shed, low-slope roofs can accumulate snow and ice, creating potential hazards. Here are some vulnerabilities that low-slope roofing systems face:

Ice Dams – Low-slope roofs are prone to the formation of ice dams, where melting ice or snow refreezes at the roof’s edge. This can trap water and lead to leaks, potentially causing damage to the roofing materials and the underlying structure.

Low slope roof winter protection includes preventing ice dams

Snow Accumulation – Low-slope roofs may struggle to shed snow effectively, leading to heavy snow load accumulation. Excessive snow buildup can exert significant pressure on the roof structure, posing structural damage risks or collapse.

Condensation Issues – Low-slope roofs may experience condensation issues during a freeze (especially with inadequate ventilation). Condensation can contribute to ice dam formation, compromising roof material integrity.

Brittle Roofing Materials – Cold temperatures can make roofing materials more brittle and prone to damage. Low-slope roofs may be more susceptible to cracking, breaking, and other issues caused by material contraction and expansion during freeze-thaw cycles.

Protecting Low-Slope Roofing Systems in Winter

Even though winter weather may pose multiple challenges, you can take measures to minimize roofing emergency risks before they slow your business down. Consider the following:

Regular Inspections – Schedule regular low-slope roof inspections before winter sets in. Identify and address any existing issues like:

  • Damaged or deteriorating roofing materials
  • Flashing problems
  • Potential drainage issues
  • Ponding

Ensure Proper Drainage – Adequate drainage is crucial for low-slope roofs. Clear debris from drains, gutters, and scuppers to ensure unobstructed water flow. Proper drainage helps prevent water ponding and reduces ice dam formation risks.

Low slope roof winter protection includes keeping debris from drains

Roof Insulation and Ventilation – Enhance insulation in the roof structure to minimize heat loss and reduce ice dam formation likelihood. Ensure proper ventilation to maintain a consistent temperature and minimize condensation issues.

Install Ice and Water Shields – Consider installing ice and water shields along the eaves and critical areas of your low-slope roof. These shields provide an additional protective layer against ice dam formation and water infiltration during freezing conditions.

Snow Removal – Safely remove accumulated snow from your low-slope roof using snow removal tools, like snow rakes. This helps prevent excessive snow loads and reduces structural damage risks.

Use Heated Roofing Systems – For extreme cold environments, consider installing heated roofing systems to prevent ice dam formation. These systems use heating elements to melt snow and ice, promoting safe and efficient drainage.

Apply Reflective Coatings – Reflective coatings can be applied to low-slope roofs to reduce heat absorption from the sun. This helps prevent ice dam formation and protects roofing materials from the damaging prolonged effects of ultraviolet (UV) radiation.

Prevent Foot Traffic – Keep any rooftop foot traffic to a minimum. Walking on a frozen membrane can cause breaks and tears, resulting in leaks when the roof thaws.

Tip: Maintain a Roof Maintenance Plan with annual inspections to identify potential issues before they develop into costly damages.

When to Call Your Roofer

Ideally, low-slope roofing systems should be inspected and maintained throughout the year and after severe weather events. However, when the following issues appear, they should be immediately addressed:

Persistent Ice Dam Issues – When ice dams persist despite your efforts, call a roofer. Roofing professionals can assess the situation, identify the underlying causes, and implement effective solutions.

Structural Concerns – If you notice structural damage signs or are concerned about accumulated snow weight on your low-slope roof, consult with a roofer. Structural issues should be addressed promptly to prevent further damage.

Water Leaks Inside the Building – Water leaks inside your building during winter are urgent issues that require immediate attention. If you notice water stains on ceilings or walls, contact your roofer to identify and address any leaks.

Roofing Material Damage – If roofing materials on your low-slope roof show signs of damage like cracking, breaking, or unusual stretching, consult your roofer. Damaged materials compromise a roofing system’s effectiveness and should be addressed promptly.

Emergency Repairs – During emergencies, like sudden leaks or extreme cold damage, don’t hesitate to call your roofer for emergency repairs. Prompt action can minimize damage and prevent further issues.

Low slope roof winter protection includes making emergency repairs

Winter Protection for Low-Slope Roofing

In this article, you discovered how low-slope roofing systems can be vulnerable to extreme winter weather, how to protect them, and when to call a professional commercial roofer.

Keeping up with roof maintenance and calling your roofer when issues arise will help your commercial or residential low-slope roofing system reach or surpass its intended lifespan.

Ignoring required roof maintenance and roof damage signs will leave you with potentially severe structural damage and costly repairs.

Sources:
extension.umn.edu/farm-safety/prevent-roof-collapse
web.mit.edu/parmstr/Public/NRCan/CanBldgDigests/cbd089_e.html
theyoungmarines.org/guide-to-winterizing-your-flat-roof

  New Image Roofing Atlanta
 

    2020 Howell Mill Rd NW Suite 232
    Atlanta, GA 30318
    (404) 680-0041
 
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Parapet Walls for Commercial Flat Roofs

Wondering why there is a wall around your flat roof? Understanding why parapet walls are installed around low-slope roofing systems will give you crucial insight to their function and necessity.

Parapet walls for low slope roofing systems

The professional roofers at New Image Roofing Atlanta assembled a comprehensive guide to parapet wall design, height, necessity, and waterproofing.

What is a Parapet Wall?

A parapet is a barrier that is an upward extension of a wall at the edge of a roof (seen in many flat roofing projects). This extension projects above the flat roof (can vary in height and width according to local building codes and its designed function). The word comes ultimately from the Italian parapetto.

Parapet Wall Design

A plain parapet wall is a simple vertical extension of the wall on the building’s outside. They are most common in commercial buildings without ornate decoration (it can be difficult to tell where parapet walls start looking from the building’s outside). They are generally more about functionality than design. Consider the following:

Purpose and Functionality – Parapet walls serve various functions for flat roofs, acting as aesthetic and functional elements. They provide a barrier that conceals rooftop equipment, helps prevent falls, and enhances the overall appearance of the building. Additionally, parapet walls are a crucial line of defense against water ingress, a common concern with flat roofs.

Parapet walls are used to hide rooftop equipment and machinery

Aesthetic Considerations – From a design perspective, parapet walls contribute significantly to the visual appeal of a building. Architects often use them to create a uniform and pleasing silhouette, giving the structure a more finished and polished look. Parapets also offer opportunities for architectural creativity, with options for different materials, textures, and decorative elements.

Parapet Wall Height

Parapet walls are installed on flat roofs for safety

Local building codes often determine how and when parapet walls should be constructed on commercial structures.

Building Codes and Safety – Determining parapet wall optimal height is a nuanced process that involves adherence to building codes and safety regulations. Building codes typically mandate minimum parapet heights to ensure occupant safety and prevent accidents. The International Building Code (IBC) and other regional codes provide guidelines on parapet wall heights based on factors like building occupancy, roof usage, and fire safety.

Read more about parapet wall specifications at codes.iccsafe.org/s/IBC2021P2/chapter-7-fire-and-smoke-protection-features/IBC2021P2-Ch07-Sec705.11

Wind Uplift Considerations – Parapet wall height is not solely about aesthetics and safety (it plays a crucial role in mitigating wind uplift forces). Tall parapets can act as a windbreak, reducing the impact of strong winds on the roof and preventing damage to roofing materials. Engineers must consider local wind patterns and calculate the appropriate parapet height to optimize wind resistance.

When Are Parapet Walls Necessary

Parapet walls are mainly found on flat roofs, extending a vertical wall at the side of a commercial, industrial, or residential structure past the roofline. Flat or low-slope roofing systems include:

Parapet walls are typically required when the roof must double as something like a terrace, balcony, facilities area, lounging area, or walkway, helping keep the area safe.

Parapet walls promote safety on walkable roofs

Roof Access and Safety – Parapet walls become essential when rooftop access is necessary for maintenance, service, or other activities. They provide a protective barrier, considerably reducing accidental fall risks. OSHA (Occupational Safety and Health Administration) regulations often require the presence of parapet walls or other protective measures when employees work on flat roofs.

Read more about OSHA’s fall protection system criteria at osha.gov/laws-regs/regulations/standardnumber/1926/1926.502

Water Management – In regions with heavy rainfall or potential for flooding, parapet walls play a crucial role in:

  • Managing water runoff
  • Preventing water from cascading off the roof’s edge
  • Reducing erosion and water damage to the building’s foundation and landscape

Properly designed parapets incorporate drainage systems to efficiently guide water away from the roof surface.

Concealing Rooftop Equipment – Flat roofs often house HVAC units, solar panels, and other equipment or activities necessary for building functionality. Parapet walls offer an effective solution for concealing these elements, maintaining a clean and uncluttered appearance while providing easy access for maintenance.

Waterproofing Parapet Walls

Parapet walls use flashing to prevent leaks

Like your roofing system, parapet walls must repel and shed water efficiently. Parapet walls that allow water infiltration will lead to costly structural damages.

Flashing and Sealants – Effective waterproofing is paramount for parapet wall longevity and performance.

  • Flashing (water-resistant material) is installed at the roof and parapet junction to create a watertight seal
  • Sealants are used to fill gaps and joints, preventing water infiltration

Cap Flashing – Cap flashing is an essential parapet waterproofing component (metal flashing installed at the parapet wall’s top, extending over the roof membrane). Cap flashing prevents water from seeping into the joint between the parapet and the roof, offering an additional protective layer against leaks.

Parapet walls use metal caps and flashing to prevent water infiltration

Proper Drainage – Adequate drainage prevents water buildup on flat roofs and parapet walls. Scuppers (openings in the parapet that allow water to drain) are commonly used with conductors, gutters, and downspouts to ensure efficient water management. Regular maintenance, including clearing debris from scuppers, is crucial for the effectiveness of the drainage system.

Parapet walls drain water with scuppers conductor heads and downspouts

Read more about roof maintenance plans

Quality Materials and Construction – Choosing durable and weather-resistant materials for parapet walls is fundamental to their long-term waterproofing. Consider the following:

  • High-quality masonry, metal, or composite materials ensure durability and safety
  • Professional construction practices, contribute to the parapet wall resilience against water intrusion
  • Expert roof installation will ensure that parapet walls are protected and efficiently drain water

Tip: Thoroughly vet all of your contractors, verifying their credentials, past work, licenses, and insurance before contracting them.

Parapet Walls for Flat Roofs

In this article, you discovered crucial information about parapet wall design, height, necessity, and waterproofing for your commercial or residential low-slope roofing system.

Installing parapet walls around flat or low-slope roofing systems ensures occupant safety, building aesthetics, and supports effective water management.

Ignoring the need for parapet walls may leave your roof vulnerable to accidents and expose unsightly machinery or equipment on the rooftop, potentially decreasing your structure’s curb appeal and value.

Sources:
osha.gov/laws-regs/regulations/standardnumber/1926/1926.502
theconstructor.org/building/parapet-walls-types-uses/28646
codes.iccsafe.org

  New Image Roofing Atlanta

    2020 Howell Mill Rd NW Suite 232
Atlanta, GA 30318
(404) 680-0041

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