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  • Average homeowner rating star icon4.5
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  • Verified reviews icon1.2k+
    Verified percolation testing services reviews

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Avatar for Attic Pros

Attic Pros

4.91(
195
)
Approved Pro

Attic Pros

4.91(
195
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
13 years of experience

Attic Pros provides outstanding products combined with superior service to ensure your satisfaction. Our team work's directly with you making sure we cover all areas that may have insulation issues. Once we've done this we can make a custom plan for property. Call Attic Pro Today for your professional consultation. *******5% Off Mold Removal Project******* For a limited time, we're excited to offer you a special discount of 5% off your mold removal project. Don't miss out on this opportunity to ensure a healthier environment for your home or business while saving money. Contact us today to schedule your mold inspection and take advantage of this exclusive offer!

"Hired to blow new insulation into the attic. Reasonable pricing, professional people who showed up on time and kept the work area clean. Would recommend."

Joyce S on August 2025

Attic Pros provides outstanding products combined with superior service to ensure your satisfaction. Our team work's directly with you making sure we cover all areas that may have insulation issues. Once we've done this we can make a custom plan for property. Call Attic Pro Today for your professional consultation. *******5% Off Mold Removal Project******* For a limited time, we're excited to offer you a special discount of 5% off your mold removal project. Don't miss out on this opportunity to ensure a healthier environment for your home or business while saving money. Contact us today to schedule your mold inspection and take advantage of this exclusive offer!

"Hired to blow new insulation into the attic. Reasonable pricing, professional people who showed up on time and kept the work area clean. Would recommend."

Joyce S on August 2025


Avatar for Complete Plumbing Services

Complete Plumbing Services

4.95(
58
)
Approved Pro

Complete Plumbing Services

4.95(
58
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
14 years of experience

We take great pride in our 16 years of experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Had a hot water heater started leaking on a Sunday Called and Sal showed up in about 1 hour. Thought my heater was under warranty made phone calls and found mine expired 30 days late tried to get the manager at home depot to entend it but they would not So he got a new one for a little less that I would of had to pay for it did a lot other replacement of out dated parts Gave me a honest and fair price. Everything was cleaned up after he was done Great guy and great Job Will use again when needed and will ask for Sal Dewey Todd Faifield"

Dewey C on May 2024

We take great pride in our 16 years of experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Had a hot water heater started leaking on a Sunday Called and Sal showed up in about 1 hour. Thought my heater was under warranty made phone calls and found mine expired 30 days late tried to get the manager at home depot to entend it but they would not So he got a new one for a little less that I would of had to pay for it did a lot other replacement of out dated parts Gave me a honest and fair price. Everything was cleaned up after he was done Great guy and great Job Will use again when needed and will ask for Sal Dewey Todd Faifield"

Dewey C on May 2024


Avatar for Best Chance Heating and Cooling

Best Chance Heating and Cooling

5.00(
41
)
Approved Pro

Best Chance Heating and Cooling

5.00(
41
)
Approved Pro
Super Service Award
Customers say: Quick response
2 years of experience
Free onsite estimate

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Best Chance Heating and Cooling, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Chance and his assistant replaced our water heater. It was located in the garage on a small platform. They were fast, friendly, and efficient and very fair priced! I will definitely invite Chance to our home for any future projects. Polite people!"

Jim G on November 2025

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Best Chance Heating and Cooling, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Chance and his assistant replaced our water heater. It was located in the garage on a small platform. They were fast, friendly, and efficient and very fair priced! I will definitely invite Chance to our home for any future projects. Polite people!"

Jim G on November 2025


Avatar for McD's Flooring Installs

McD's Flooring Installs

4.96(
54
)
Approved Pro

McD's Flooring Installs

4.96(
54
)
Approved Pro
Super Service Award
Customers say: True professional
1 years of experience
Free onsite estimate

We are a family operated business with over 30 years of flooring experience. Our services include; luxury vinyl, laminate, waterproof vinyl plank floors, subfloor repairs, leveling, and moisture and sound barriers. We are also available to repair other types of floor coverings.

"Ed did a great job with all my projects. He installed a wall mount for my 60” TV. Reinstalled electrical equipment under my LazyBoy furniture. Constructed several organizational products. Helped rearranged furniture."

Adele M on December 2025

We are a family operated business with over 30 years of flooring experience. Our services include; luxury vinyl, laminate, waterproof vinyl plank floors, subfloor repairs, leveling, and moisture and sound barriers. We are also available to repair other types of floor coverings.

"Ed did a great job with all my projects. He installed a wall mount for my 60” TV. Reinstalled electrical equipment under my LazyBoy furniture. Constructed several organizational products. Helped rearranged furniture."

Adele M on December 2025


Avatar for Water Heaters Masters

Water Heaters Masters

4.96(
102
)
Approved Pro

Water Heaters Masters

4.96(
102
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
19 years of experience

We are a small family owned business and our reputation is built one satisfied customer at a time. In a time where finding honest and well trained experts in the plumbing industry is difficult, we pride ourselves in serving you better. We know you have choices and will make every effort to demonstrate that we are the best option for your water heater, tankless water heater, and high efficiency water heater needs. We offer competitive pricing, the best products, and most important great customer service. We also want to do work for your friends and family, so the best endorsement for us is a job well done and a happy customer. We do standard water heater repairs and replacement but also bigger projects like relocation jobs and tankless water heater installations to name a few. Our technicians are highly experienced and have installed thousands of water heaters. Call or text us at 925-817-8342 for a free estimate. We serve residential or commercial customers, including apartments and condos.

"They were able to get out to me quickly, even on the weekends. They were very professional. "

Katharine K on December 2025

We are a small family owned business and our reputation is built one satisfied customer at a time. In a time where finding honest and well trained experts in the plumbing industry is difficult, we pride ourselves in serving you better. We know you have choices and will make every effort to demonstrate that we are the best option for your water heater, tankless water heater, and high efficiency water heater needs. We offer competitive pricing, the best products, and most important great customer service. We also want to do work for your friends and family, so the best endorsement for us is a job well done and a happy customer. We do standard water heater repairs and replacement but also bigger projects like relocation jobs and tankless water heater installations to name a few. Our technicians are highly experienced and have installed thousands of water heaters. Call or text us at 925-817-8342 for a free estimate. We serve residential or commercial customers, including apartments and condos.

"They were able to get out to me quickly, even on the weekends. They were very professional. "

Katharine K on December 2025


Avatar for Service Champions Heating & Air Conditioning

Service Champions Heating & Air Conditioning

4.71(
621
)
Approved Pro

Service Champions Heating & Air Conditioning

4.71(
621
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
22 years of experience

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

" It was very good. "

Bob A on December 2025

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

" It was very good. "

Bob A on December 2025


Avatar for Moore Home Services

Moore Home Services

4.80(
356
)
Approved Pro

Moore Home Services

4.80(
356
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
16 years of experience

At Moore Home Services, your comfort is our promise. Since 2009, we’ve grown into a trusted HVAC leader across Northern California with 50+ trucks and 100+ highly trained team members. We believe in 100% honesty—if a simple repair is best, that’s exactly what you’ll get. Our HVAC services come with a 1-Year Trial Guarantee: if you’re not completely satisfied, we’ll refund every penny. From furnace repairs to A/C installs, our friendly, expert techs are here to help—because your happiness is our only goal.

"Orion C. Arrived on time with a friendly smile to perform my annual Fall checkup. He provided outstanding service - professional, knowledgeable, and always courteous throughout! My system runs perfectly and I would highly recommend their excellent service as represented by Orion! They are clearly committed to customer satisfaction."

Steve B on September 2025

At Moore Home Services, your comfort is our promise. Since 2009, we’ve grown into a trusted HVAC leader across Northern California with 50+ trucks and 100+ highly trained team members. We believe in 100% honesty—if a simple repair is best, that’s exactly what you’ll get. Our HVAC services come with a 1-Year Trial Guarantee: if you’re not completely satisfied, we’ll refund every penny. From furnace repairs to A/C installs, our friendly, expert techs are here to help—because your happiness is our only goal.

"Orion C. Arrived on time with a friendly smile to perform my annual Fall checkup. He provided outstanding service - professional, knowledgeable, and always courteous throughout! My system runs perfectly and I would highly recommend their excellent service as represented by Orion! They are clearly committed to customer satisfaction."

Steve B on September 2025


Avatar for GSW Pumping LLC

GSW Pumping LLC

5.00(
21
)
Approved Pro

GSW Pumping LLC

5.00(
21
)
Approved Pro
Super Service Award
10 years of experience
Free onsite estimate

GSW Pumping is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"n/a"

Robin V on November 2025

GSW Pumping is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"n/a"

Robin V on November 2025


Avatar for RIDGEBACK MECHANICAL

RIDGEBACK MECHANICAL

5.00(
20
)
Approved Pro

RIDGEBACK MECHANICAL

5.00(
20
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Vince was thorough and professional. I will definitely call on him again for HVAC work."

Michael T on January 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Vince was thorough and professional. I will definitely call on him again for HVAC work."

Michael T on January 2025


Avatar for Oak Plumbing Inc

Oak Plumbing Inc

4.68(
84
)
Approved Pro

Oak Plumbing Inc

4.68(
84
)
Approved Pro
Super Service Award
Customers say: Quick response
9 years of experience
Free onsite estimate

Oak Plumbing is a locally owned and operated plumbing company serving Solano, Marin & Contra Costa Counties. We provide options to prevent, repair, and maintain your water system to best fit your family’s needs. Our goal is to bring customer service back to the plumbing industry. We specialize in residential plumbing repair as well as preventative maintenance. We offer up-front pricing and also Pace financing to be able to service everyone equally. We want to fix the cause of the problem, not just the symptom. Safety is extremely important to us which is why all our technicians are fully trained, background checked, and drug tested.

"Professional, good communication, fair price!"

Howard G on October 2025

Oak Plumbing is a locally owned and operated plumbing company serving Solano, Marin & Contra Costa Counties. We provide options to prevent, repair, and maintain your water system to best fit your family’s needs. Our goal is to bring customer service back to the plumbing industry. We specialize in residential plumbing repair as well as preventative maintenance. We offer up-front pricing and also Pace financing to be able to service everyone equally. We want to fix the cause of the problem, not just the symptom. Safety is extremely important to us which is why all our technicians are fully trained, background checked, and drug tested.

"Professional, good communication, fair price!"

Howard G on October 2025

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Percolation Tests questions, answered by experts

If you own a stereo microscope, you should be able to see the fibers. The stereo microscope often can perform magnification up to 50x. But unless you have experience viewing asbestos fibers, you may not know exactly what you are seeing. Some fibers are curly, while others are long and straight. Blue, brown, white, and gray colored fibers are all possible.

Because of the danger of inhaling asbestos fibers, figuring out through testing whether your popcorn ceiling contains asbestos is definitely worth it. If the popcorn ceiling texture has asbestos, remove it as soon as possible to keep your family safe. Any home built in or before the 1980s that has popcorn ceilings could have asbestos, necessitating testing. Asbestos carries several health risks for people who inhale it, including the increased chance of developing lung cancer in the future.

When learning how to test for asbestos in a popcorn ceiling, you have an option for a DIY job or to hire a professional tester. You can purchase a kit at a hardware store and use personal protective equipment while doing the test. If you don’t want to risk any potential exposure to asbestos, hire a professional asbestos testing company instead.

If you have an older electrical system with fraying wires and other signs of damage, removal  may be the best course of action. When asbestos begins to break down, it's more likely to become airborne, increasing the risk of health issues when it's inhaled.

However, if the system is in good condition and doesn't have visible signs of wear or damage, leaving it alone may be the safest course of action. An asbestos abatement and removal professional can help you determine the best way to proceed.

In the event of suspected or confirmed asbestos contamination on the body, it is imperative to take immediate measures to reduce health risks. To avoid further exposure, carefully remove contaminated clothing and shower thoroughly to remove any asbestos fibers. Seek prompt medical attention, and inform your healthcare professional about your suspected asbestos exposure. Since asbestos-related health issues can take years to surface, regular medical check-ups are advised for anyone with a history of exposure.

The Napa, CA homeowners’ guide to percolation testing services

From average costs to expert advice, get all the answers you need to get your job done.

What do you need done? We’ll find top pros.
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