LC Heating & Air provides professional duct sealing services to help Pico-Robertson homeowners stop energy loss, reduce utility bills, and improve home comfort. We use duct blaster testing to identify leaks and provide both manual mastic sealing and Aeroseal solutions.
I'm Leo, owner of LC Heating & Air. I spend a lot of time in Pico-Robertson crawl spaces and attics, and I see the same issue over and over: homeowners are paying to cool or heat their attics instead of their living rooms. When your ductwork leaks, your HVAC system works harder than it needs to, and you end up with uneven temperatures and higher energy bills.
Duct sealing isn't just about plugging holes; it's about making sure the air your system produces actually gets to the rooms where you spend your time. Whether you have an older home with original sheet metal or a newer remodel with flex duct, we start by testing your system to see exactly where the air is escaping. We don't guess, and we don't sell you services you don't need.
Local HVAC considerations
Pico-Robertson (90035)
CSLB #1073586
(323) 970-3113
Why Pico-Robertson Homes Need Duct Attention
Pico-Robertson has a mix of housing styles, from older single-family homes to small multifamily buildings and recent remodels. In many of these homes, the ductwork is hidden in attics or wall cavities where it is exposed to extreme temperatures. If those ducts have leaks, you are losing conditioned air into unconditioned spaces, which forces your system to run longer cycles just to keep up.
Dust is another common complaint here. If your ducts are leaking, they can pull in dust from your attic or wall cavities and blow it directly into your living space. We often see this when we inspect systems that have never had the ductwork properly sealed or cleaned. If you notice dust buildup on your registers, it is a clear sign that your duct system is not airtight.
Understanding Your Home's Duct System
The age of your home in Pico-Robertson usually tells me what kind of ductwork I'm going to find. Older homes often have sheet metal ducts that have developed leaks at the joints over time due to expansion and contraction. Newer remodels often use flex duct, which can get crushed, kinked, or disconnected during construction or routine attic maintenance.
Before we recommend any sealing, we look at the whole system. We check the return sizing, the condition of the insulation, and the overall airflow. If the ducts are falling apart or are undersized, sealing them might not be enough. We will be honest with you about whether a repair is the right move or if the system is at a point where replacement is the more practical long-term decision.
Our Diagnostic Process
We don't start by applying sealant. We start with a duct blaster test. This is a standard procedure where we pressurize your duct system to measure exactly how much air is leaking. It gives us a baseline number so we can show you, in writing, how much air you are losing.
Once we have the data, we decide on the best approach. If the leaks are at accessible joints, we use manual mastic sealing. If the leaks are distributed throughout the system in hard-to-reach areas, we use the Aeroseal process. After we finish, we perform a second test to verify the results. You get the documentation, and you see the improvement in the numbers.
Repair or Replace?
This is the most common question I get at the kitchen table. If your ducts are in decent shape but have some loose connections or gaps, sealing is a great investment. It is a permanent fix that pays for itself in energy savings. However, if the ductwork is severely damaged, undersized, or made of materials that are failing, patching it is just a temporary fix.
If I see that your system is worth repairing, I will tell you. If the pattern of damage points to a need for replacement, I will explain why. My goal is to make sure you have a system that works for your home, not just a quick patch that fails in a year.
What to Expect with Costs
Duct sealing costs vary based on the size of your home and the accessibility of the ducts. Manual mastic sealing typically runs between $400 and $1,200. Aeroseal, which is a more involved process, usually ranges from $1,500 to $3,000. These prices include the diagnostic testing and the verification testing.
We believe in transparency. We provide a written estimate after we inspect your system, so you know exactly what you are paying for before we start. We don't use high-pressure sales tactics; we provide the facts and let you decide what makes sense for your budget and your home.
Access and Scheduling
Because Pico-Robertson has many different building types, access is always a factor. We need to be able to reach your air handler and your duct runs. If your ducts are in a tight attic or a crawl space, we plan for that. We make sure we have the right equipment and the right team to get the job done safely.
Most duct sealing projects take about a day. For the Aeroseal process, we do ask that you vacate the home for about 60 to 90 minutes while we run the equipment. It is a straightforward process, and we work to minimize the disruption to your daily routine.
Mistakes to Avoid
The biggest mistake I see is the use of standard silver 'duct tape.' It dries out, the adhesive fails, and within a few years, you are right back where you started. We only use professional-grade mastic and foil-backed HVAC tape that is designed to last for the life of the system.
Another mistake is ignoring the return side of the system. Many people focus only on the supply ducts, but if your return ducts are leaking, they are pulling in attic air and dust, which ruins your indoor air quality. We test and seal the entire system, not just the parts that are easy to reach.
Health and Safety
Your health is our priority. When we seal your ducts, we are also improving your indoor air quality by preventing dust, insulation particles, and attic pollutants from entering your airstream. The materials we use, including the Aeroseal polymer, are non-toxic and safe for your home.
We also check for proper airflow and system balance. A system that is too restricted can cause issues with your equipment, so we ensure that our sealing process improves efficiency without putting unnecessary strain on your blower motor. We are licensed (CSLB #1073586) and insured, so you can have peace of mind while we work.
Is Duct Sealing Right for You?
If your energy bills are higher than they should be, or if some rooms in your house never seem to get comfortable, duct sealing is often the missing piece of the puzzle. It is one of the most effective ways to improve the performance of your existing HVAC system.
Call us at (323) 970-3113 to discuss your home. We will come out, inspect your system, and give you an honest assessment. If sealing your ducts will solve your problem, we will get it done. If you need something else, we will tell you that too.
How the visit works
We perform a duct blaster test to quantify existing leakage as a percentage of system airflow.
Based on leakage quantity, duct type, and accessibility, we recommend manual sealing, Aeroseal, or a combination.
We apply mastic to all accessible joints and plenums, or set up and run the Aeroseal process for internal sealing.
We re-run the duct blaster test and provide you with before/after leakage numbers as written documentation.
Cost factors we review before quoting
- • Duct inspection: $125–$200
- • Duct cleaning (whole house): $400–$900
- • Duct sealing: $1,000–$3,000
- • Duct repair or replacement: $500–$5,000
Useful next steps
Duct Sealing in Pico-Robertson at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Pico-Robertson, CA 90035
- • License: CSLB C-20 #1073586
- • Phone: (323) 970-3113
- • Estimate: written estimate before approved work
- • Emergency calls answered within 30 minutes (24/7)
Our duct sealing process in Pico-Robertson
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Pico-Robertson is reviewed for practical HVAC accuracy by Leo at LC Heating & Air. LC Heating & Air holds California CSLB C-20 HVAC license #1073586 and provides written estimates before approved work.
What Pico-Robertson customers say about duct sealing
Verified reviews from homeowners in Pico-Robertson and nearby neighborhoods who used our duct sealing service.
“Had LC install a Daikin mini split in our 1940s bungalow that never had AC. The work was clean, the unit is incredibly quiet, and our bedroom finally stays cool in summer. Highly recommend.”
“We converted our garage into an ADU and needed HVAC. LC installed a Mitsubishi single-zone mini split — permits, electrical, everything. The unit is so quiet you can barely hear it running. Our tenant loves it.”
“Got a 3-zone Daikin system for our craftsman home — bedrooms upstairs, living room downstairs. Each room has its own temperature control and the monthly electric bill is actually lower than our old window units combined.”
