How much does mold remediation cost?

The cost of mold remediation varies depending on the size and severity of the infestation. On average: Small areas (10–50 sq ft): $500 to $1,500; Medium infestations (100–400 sq ft): $1,500 to $6,000; Large infestations (500 sq ft or more): $6,000 to $15,000 or more. Toxic black mold may increase the cost, typically $20 to $40 per square foot due to stricter safety protocols.

Is mold removal covered by insurance?

Many homeowners’ insurance policies cover mold removal if the mold is caused by a covered peril (e.g., water damage from a burst pipe). However, mold damage due to neglect, such as failing to fix a leaky roof or poor ventilation, is often excluded. Always check with your insurance provider to understand your coverage.

Can I remove mold myself?

While it is possible to remove small amounts of mold yourself, it's usually safer and more effective to hire a professional, especially for larger infestations or toxic black mold. DIY mold removal can spread spores, and if the root cause (e.g., leaks or poor ventilation) isn’t addressed, the mold will likely return.

What are the health risks of mold exposure?

Mold exposure can cause various health problems, including respiratory issues, skin irritation, headaches, and allergic reactions. People with asthma, compromised immune systems, or allergies are particularly vulnerable. Delaying mold removal can increase the risk of serious health issues, particularly for children and the elderly.

How long does mold remediation take?

The duration of mold remediation depends on the size and complexity of the infestation. Small jobs might take a few hours, while larger infestations can take several days or even weeks to completely address, especially if repairs (like ventilation or structural work) are needed.

How can I prevent mold from growing in the future?

Preventing mold is always cheaper than remediation. Key preventive measures include: Controlling humidity: Use dehumidifiers and humidity sensors to monitor moisture levels; Fixing leaks promptly: Repair leaks in roofs, windows, and plumbing as soon as they’re detected; Improving ventilation: Ensure proper ventilation in high-humidity areas like bathrooms and basements; Regular home inspections: Schedule inspections after storms or flooding to catch mold issues early.

Is there a warranty for mold removal services?

Many mold remediation companies offer warranties, typically covering follow-up visits if mold returns within a set timeframe (e.g., 1–3 years). Be sure to ask about warranty options when hiring a contractor to ensure you're protected against future mold growth.

Modified Bitumen Roofing: Types & Benefits

What is a Modified Bitumen Roof?

In the past fifty or so years, modified bitumen roofing has advanced from being an exploratory invention to one of the most frequently used commercial roofing systems in the roofing industry. Its toughness, durability, and somewhat ease of installation has made it the roofing material go to for millions of roofing projects all over the world. However, what is modified bitumen roofing, and why is it unrivaled to other types roofing material?

This post goes into depth about MB roofs, discussing what it is, identify the different types of modified bitumen, and the benefits, so you can make an sensible decision about if a modified bitumen roof is right for your business.

What is Modified Bitumen Roofing (MB Roof)?

Modified bitumen is deemed to be the revolutionary relative of the built-up flat roofing systems (BUR) that have been utilized on low-sloping roofs for over one hundred years. It is made up of asphalt in combination with plastic or polymerized rubber, then backed with fiberglass creating a rugged-yet-pliable waterproof layer.

This kind of roofing is mainly utilized on flat or low-sloping commercial roofs. Subject to the kind and material, these layers can be installed being part of a two-layer system or as part of multi-ply systems.

Application Techniques for Modified Bitumen Roofing Systems

Modified bitumen usually comes in layer form, in rolls that are applied directly onto the substrate using an adherent. The material can be cold-adhered, heat-welded, or in many cases, self adhered (as with some Polyglass’ leading products featuring ADESO^® self-adhering technology).

Many modified bitumen membranes might also be attached mechanically. A lot of applications require at a minimum 2 layers (a bottom layer and a cap layer), but in many cases, it may be applied in a multi-ply system of 3 or more layers.

Types of Modified Bitumen Membranes

Modified bitumen usually falls into one of two types: SBS and APP.

SBS Membranes

SBS means styrene-butadiene-styrene, but many think of these membranes as “flexible” or “water resistant” asphalt. These membranes are a combination of asphalt and polymerized rubber for natural flexibility and pliancy. SBS is an ideal choice for buildings of which roofs contract and expand with severe temperature fluctuations, in addition to roofs subjected to high winds.

APP Membranes

Commonly referred to as “plastic asphalt,” atactic polypropylene or APP membranes consisting of asphalt mixed with plasticized polymers that turn elastic under higher temperatures. APP is UV ray resistant and is a good choice for buildings in search of a “cool roof” effect.

What are Benefits of Modified Bitumen Roofing?

Resistant to tearing. MB offers excellent durability and toughness, making it resistant to tearing from weathering, debris, and even continual foot traffic.
When correctly installed, modified bitumen offers some of the best waterproofing protection of any roofing material in the industry. Unnecessary layers increase this quality even more.
Easily installed, repaired, and maintained.MB is easy to maintain, and should it tear or leak, it can be easily repaired.
Modified bitumen contracts and expands with fluctuating weather conditions without losing durability.
Energy-efficient. Specific kinds of modified bitumen offer high resistance to UV rays, and reflect the sun’s rays for decreased energy bills.

G Keith Roofing and waterproofing in New York

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Frequently Asked Questions

1. What is modified bitumen roofing?

Modified bitumen (MB) roofing is a modern type of commercial roofing that evolved from traditional built-up roofing systems. It consists of asphalt combined with polymers or rubber, reinforced with fiberglass or polyester mats, creating a strong yet flexible waterproof layer. This combination allows MB roofs to be highly durable, resistant to harsh weather, and suitable for flat or low-sloping roofs, which are common in commercial buildings.

2. How does modified bitumen differ from traditional roofing?

Unlike traditional built-up roofing, which is made of multiple layers of asphalt and felt, modified bitumen is enhanced with polymers to improve flexibility and performance. This makes it more resistant to cracking, tearing, and extreme temperature changes. Additionally, MB roofs are easier and faster to install, maintain, and repair, offering commercial property owners a longer-lasting, cost-effective solution compared to older roofing systems.

3. What are the types of modified bitumen membranes?

There are two main types of modified bitumen membranes:

SBS (Styrene-Butadiene-Styrene): Known for its flexibility, SBS is ideal for roofs that expand and contract due to temperature changes. It is highly resistant to cracking and can withstand high winds, making it a reliable option in colder climates or areas with fluctuating temperatures.
APP (Atactic Polypropylene): Often called plastic asphalt, APP membranes become more elastic when exposed to heat. They are UV-resistant and can reflect sunlight, which helps reduce heat absorption and cooling costs. APP is particularly suitable for warm or sunny climates where a cool roof effect is desired.

4. How is modified bitumen installed?

Modified bitumen membranes come in large rolls and can be applied in several ways, depending on the product and roof type. Installation methods include heat-welding, cold-adhering, self-adhering systems like ADESO, or mechanical attachment with fasteners. Most roofs require at least two layers—a base layer and a cap layer—for optimal protection, though multi-ply systems with three or more layers are often used for extra durability. Proper installation ensures the roof can resist leaks, weathering, and foot traffic for decades.

5. What are the benefits of modified bitumen roofing?

Modified bitumen offers numerous advantages over other roofing systems:

Durability: Resistant to tearing, punctures, and harsh weather conditions.
Waterproofing: Provides one of the most reliable barriers against leaks and water damage.
Ease of maintenance: Repairs are simple and cost-effective, allowing individual layers to be patched without replacing the entire roof.
Flexibility: Expands and contracts with temperature changes without losing integrity.
Energy efficiency: Certain MB membranes reflect sunlight and resist UV rays, helping reduce energy bills and keeping buildings cooler.

6. How long does a modified bitumen roof last?

With proper installation and routine maintenance, a modified bitumen roof can last anywhere from 20 to 30 years. The exact lifespan depends on factors like climate, roof usage, membrane type, and the quality of installation. Regular inspections and maintenance can extend the life of the roof even further, ensuring it continues to provide superior protection for decades.

7. Can modified bitumen be repaired if damaged?

Yes. One of the biggest advantages of MB roofing is that it is very repair-friendly. Small tears, punctures, or leaks can be patched easily without needing to replace the entire roof. This makes MB roofing both cost-effective and practical for long-term commercial use, minimizing downtime and repair costs.

8. Is modified bitumen suitable for all commercial buildings?

Modified bitumen roofs are best suited for flat or low-sloping commercial roofs, which are common in office buildings, warehouses, retail centers, and industrial facilities. It is ideal for buildings that require long-lasting, weather-resistant roofing that can handle heavy foot traffic, temperature fluctuations, and occasional storms. While not recommended for steep-pitched roofs, MB roofing excels in most commercial applications.

9. How energy-efficient is modified bitumen?

Certain types of modified bitumen membranes are designed to reflect sunlight and resist UV damage. This cool roof effect reduces heat absorption, which helps maintain lower indoor temperatures and reduces cooling costs. For businesses looking to improve energy efficiency and lower utility bills, MB roofing provides an effective solution without compromising durability or protection.

10. Why choose G Keith Roofing for modified bitumen installation?

G Keith Roofing has been a trusted roofing contractor in New York since 1995, specializing in installation, repair, and maintenance of commercial roofs. With decades of experience, our team ensures every project is completed professionally, on time, and at a fair price. We focus on providing long-lasting roofing solutions, expert advice, and personalized service, making the process of choosing and installing a modified bitumen roof straightforward and stress-free.

What is Modified Bitumen Roofing?