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Pressure Tested Before & After  ·  Mastic Sealant  ·  Every Leak Point Found  ·  Guaranteed
Duct Sealing · Fennimore, WI

Duct Sealing in Fennimore, WI —
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Pressure testing before sealing quantifies total leakage. Every leak point located and sealed with correct materials. Post-sealing pressure test documents the improvement. Every service guaranteed.

Pressure Tested Before & After
Mastic Sealant
Every Leak Point Found
Guaranteed
Professional Duct Sealing

Professional Duct Sealing in Fennimore, WI

Your energy bills are higher than they should be for the amount of heating and cooling your home requires in Fennimore. Certain rooms will not reach the right temperature regardless of how long the HVAC runs in Fennimore, WI. You have had the equipment checked and it is working correctly in Fennimore. If the equipment is fine but the home is not comfortable and the bills are high, the problem is almost certainly in the distribution system in Fennimore, WI. Specifically, in duct leaks that are allowing conditioned air to escape into unconditioned attic or crawl space before it reaches the rooms you are paying to heat and cool in Fennimore.

Duct leakage happens at every unsealed joint between duct sections, at every branch takeoff from the trunk line, at every register boot connection in the walls and ceilings, and at the connections where the duct system meets the air handler in Fennimore, WI. The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leakage in Fennimore. For a home spending $200 per month on heating and cooling, that is $40 to $60 per month escaping through duct leaks to the attic or crawl space in Fennimore, WI.

MBM Air Duct Cleaning finds and seals duct leaks throughout Fennimore, WI in Fennimore. Pressure testing before sealing to quantify the total leakage in Fennimore, WI. Systematic identification of every specific leak point through the accessible system in Fennimore. Correct sealant materials applied to every leak point in Fennimore, WI. Post-sealing pressure testing to document the improvement with measured numbers in Fennimore. And a guarantee on every sealing service in Fennimore, WI. Call now for same-day scheduling in Fennimore.

Why Correct Sealant Materials Last While Duct Tape Fails in Fennimore, WI

Standard duct tape uses a rubber-based adhesive that performs at room temperature but dries and loses adhesion when repeatedly exposed to the temperature extremes that duct systems experience during HVAC operation in Fennimore. A supply duct carrying cold conditioned air through a 130-degree summer attic cycles through extreme temperatures with every cooling cycle in Fennimore, WI. Standard duct tape adhesive is not formulated for this cycling and fails within a few seasons in Fennimore. Mastic sealant remains flexible after curing and maintains its seal through years of thermal cycling in Fennimore, WI. UL 181-rated foil tape maintains adhesion for 20 years or more in normal duct system conditions in Fennimore.

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Where Leaks Occur

Where Duct Leaks Occur and Why They Develop in Fennimore, WI

At Every Unsealed Duct Joint Throughout the System in Fennimore

Every connection between duct sections is a potential leak point in Fennimore, WI. In most residential installations, these joints were mechanically fastened without sealant during installation in Fennimore. Over years of thermal cycling that expands and contracts the ductwork with every HVAC cycle, even joints that were initially sealed with standard duct tape have failed as the tape dried and lost adhesion in Fennimore, WI.

At Branch Takeoffs From the Main Trunk Line in Fennimore, WI

Branch takeoffs split conditioned air from the main trunk line into the individual branch runs serving each room in Fennimore. They have multiple edges and angles that create significant potential leak area if not correctly sealed in Fennimore, WI. Branch takeoff leaks are among the largest individual leak points in typical residential duct systems in Fennimore.

At Register Boot Connections in Walls and Ceilings in Fennimore

The register boot connects the branch duct run to the wall, ceiling, or floor opening where the supply register mounts in Fennimore, WI. The connection between the flexible duct and the boot collar and the connection between the boot and the surrounding framing are both common significant leak points in Fennimore. Conditioned air escaping at the boot level leaks into the wall or ceiling cavity rather than through the register into the room in Fennimore, WI.

Why Original Installation Sealant Fails Over Time in Fennimore, WI

Systems sealed with standard duct tape develop leakage as the tape dries, cracks, and loses adhesion from temperature cycling in Fennimore. Standard duct tape on duct joints typically fails within three to five seasons of thermal cycling in Fennimore, WI. Joints that were sealed with standard tape appear sealed when first applied and are open to leakage again within a few years in Fennimore.

What Leakage Costs You

What Duct Leakage Costs You in Fennimore, WI

20–30%
DOE: Conditioned Air Lost
$40–$60
Per Month Wasted at $200/mo
$600+
Annual Waste at $200/mo Budget

How Leaking Ducts Create Comfort Problems Room by Room in Fennimore, WI

Supply duct leakage between the trunk line and the registers means rooms furthest from the air handler receive less conditioned air than they were designed to receive in Fennimore. The conditioned air that leaks out before reaching the register does not reach the room in Fennimore, WI. Rooms at the end of long duct runs with multiple leak points along the way receive the cumulative effect of all those leaks in Fennimore. The room that is always too hot in summer and too cold in winter is often at the end of a duct run with multiple unsealed joints in Fennimore, WI.

What Return Duct Leaks Do to Your Indoor Air Quality in Fennimore, WI

Return duct leaks draw air from the surrounding unconditioned space into the return airstream in Fennimore. A return duct leak in an attic draws hot, dusty attic air into the air handler in summer in Fennimore, WI. A return duct leak in a crawl space draws crawl space air including moisture, mold spores, and soil particulate into the system in Fennimore. This unconditioned air bypasses the filter and is distributed throughout the home in Fennimore, WI.

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Our Sealing Process

MBM's Duct Sealing Process in Fennimore, WI

1

Pressure Testing to Establish Total Leakage in Fennimore

MBM Air Duct Cleaning performs a duct pressure test before any sealing begins in Fennimore, WI. A calibrated fan is connected to the duct system and pressurized to a standard test pressure in Fennimore. The measured airflow represents the total leakage rate and provides the baseline for comparing with the post-sealing result in Fennimore, WI.

2

Systematic Leak Location Through the Accessible System in Fennimore, WI

With the system pressurized, MBM technicians work through the accessible duct system to locate every specific leak point in Fennimore. Every branch takeoff. Every duct joint. Every register boot connection. Every plenum seam and air handler connection in Fennimore, WI. Every identified leak point is marked for sealing in Fennimore.

3

Correct Sealant Selected for Each Leak Point in Fennimore

Mastic sealant for most duct joint and connection applications in Fennimore, WI. UL 181-rated foil tape for specific sheet metal seam applications in Fennimore. The correct material for the specific application in Fennimore, WI.

4

Every Leak Point Sealed Completely in Fennimore, WI

MBM systematically seals every identified leak point in the accessible duct system in Fennimore. Mastic applied at the correct thickness to cover the full joint gap and bond to the duct surfaces on both sides in Fennimore, WI. Every identified leak point addressed before the post-sealing pressure test in Fennimore.

5

Post-Sealing Pressure Test to Confirm the Result in Fennimore

After all identified leak points are sealed, MBM repeats the pressure test to measure the post-sealing leakage rate in Fennimore, WI. The before and after measurements quantify the leakage reduction achieved by the sealing in Fennimore. Documented evidence of the result provided to the homeowner in Fennimore, WI.

Sealant Materials

What MBM Uses to Seal Duct Leaks in Fennimore, WI

Mastic Sealant — The Professional Standard in Fennimore

Mastic is a water-based sealant specifically formulated for duct system applications in Fennimore, WI. It remains flexible after curing, maintaining its seal through the thermal cycling that duct systems experience in Fennimore. It does not dry out, crack, or lose adhesion from temperature cycling the way standard duct tape does in Fennimore, WI.

UL 181-Rated Foil Tape for Specific Applications in Fennimore, WI

UL 181-rated foil tape is tested and rated specifically for HVAC duct applications in Fennimore. Unlike standard duct tape, it maintains its adhesion through the temperature cycling of duct system operation in Fennimore, WI. Appropriate for specific sheet metal seam applications in Fennimore.

Standard Duct Tape Is Never Used in Fennimore

Standard silver duct tape is not rated for duct system applications in Fennimore, WI. Its rubber-based adhesive dries and loses adhesion from temperature cycling in Fennimore. MBM Air Duct Cleaning never uses standard duct tape for duct sealing work in Fennimore, WI.

Why MBM

Why Choose MBM Air Duct Cleaning for Duct Sealing in Fennimore, WI

Pressure Tested Before and After — Documented Improvement in Fennimore

MBM performs pressure testing before and after every duct sealing service in Fennimore, WI. The before and after measurements document the leakage reduction achieved in Fennimore. Documented improvement, not assumed improvement in Fennimore, WI.

Every Accessible Leak Point Sealed in Fennimore, WI

MBM seals every identified leak point in the accessible duct system in Fennimore. Not a representative sample. Not the most obvious points only in Fennimore, WI. Every identified leak point in Fennimore.

Correct Materials That Maintain Effectiveness Long Term in Fennimore

Mastic sealant and UL 181-rated foil tape that maintain their effectiveness through the thermal cycling of long-term HVAC operation in Fennimore, WI. Never standard duct tape in Fennimore.

Every Sealing Service Guaranteed in Fennimore, WI

Every MBM Air Duct Cleaning duct sealing service is guaranteed in Fennimore. If the sealing does not produce the expected improvement within the guarantee period, we return and address it at no additional charge in Fennimore, WI.

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Pricing

Duct Sealing Cost in Fennimore, WI

All pricing confirmed upfront before work begins in Fennimore. No surprises in Fennimore, WI.

Small system — up to 10 vents in Fennimore$300 to $600
Standard residential system — 10 to 20 vents in Fennimore, WI$500 to $1,000
Large residential system — 20 or more vents in Fennimore$800 to $1,500+
Aeroseal treatment for inaccessible leaks in Fennimore, WI$1,500 to $3,000+

A sealing service that reduces leakage by 15 to 20 percentage points returns that proportional energy cost reduction on every subsequent energy bill in Fennimore, WI. For a home spending $200 per month on heating and cooling, a 15 percent leakage reduction saves approximately $30 per month in Fennimore. A sealing service costing $500 to $1,000 pays for itself in energy savings within 18 to 36 months in most cases in Fennimore, WI. Every month after payback is net return on the investment in Fennimore.

Pressure tested before and after. Every leak found. Correct materials. Guaranteed. MBM Air Duct Cleaning in Fennimore, WI.

Call now for same-day scheduling in Fennimore.

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Service Area

Serving Fennimore, WI and Surrounding Areas

Downtown Fennimore

Homes, condos, apartments in Fennimore, WI

North Fennimore

Full north-side coverage in Fennimore, WI

South Fennimore

All south-side communities in Fennimore

East Fennimore

East-end homes and properties in Fennimore, WI

West Fennimore

Full west-side coverage in Fennimore

Surrounding Areas

Call to confirm availability in Fennimore, WI

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FAQ

Duct Sealing FAQs in Fennimore, WI

The clearest indicators in Fennimore are energy bills that seem high relative to your usage, rooms that consistently will not reach the right temperature, an HVAC system that runs continuously without achieving comfort setpoint, higher than expected dust levels throughout the home, and humidity problems during cooling season in Fennimore, WI. Pressure testing is the definitive way to quantify the leakage in your specific system in Fennimore.
A duct pressure test connects a calibrated fan to the duct system and pressurizes it to a standard test pressure in Fennimore. The airflow required to maintain that pressure is measured in Fennimore, WI. The measured airflow represents the total leakage rate of the system in Fennimore. MBM Air Duct Cleaning performs pressure testing before and after every duct sealing service in Fennimore, WI.
The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leakage before it reaches the living spaces in Fennimore. In systems with particularly poor sealing or failed original sealant, the loss can exceed 30 percent in Fennimore, WI.
Duct cleaning before duct sealing allows the mastic sealant to bond to clean duct surfaces in Fennimore. Applying mastic to duct surfaces coated with accumulated dust and debris reduces the bond quality and long-term sealing effectiveness in Fennimore, WI. MBM Air Duct Cleaning recommends cleaning before sealing when both services are needed and can coordinate both in a single visit in Fennimore.
Mastic is a water-based sealant specifically formulated for duct system applications in Fennimore. It remains flexible after curing and maintains its seal through the thermal cycling that duct systems experience during operation in Fennimore, WI. Standard duct tape uses a rubber-based adhesive that dries and loses adhesion from temperature cycling, failing within a few seasons in Fennimore.
Yes. Return duct leaks in crawl spaces draw crawl space air including its elevated moisture content into the return airstream in Fennimore. The additional moisture enters the air handler and is distributed throughout the home in Fennimore, WI. Indoor relative humidity rises despite the air conditioner running because the additional crawl space moisture load overwhelms the system's dehumidification capacity in Fennimore.
Aeroseal is a technology that seals duct leaks from inside the pressurized duct system in Fennimore. Aerosolized sealant particles are introduced into the system and travel to leak points where they accumulate and seal the gap in Fennimore, WI. It is needed when significant leakage exists in duct sections in wall cavities or ceiling plenums that cannot be physically accessed for manual sealant application in Fennimore.
Mastic duct sealant maintains its sealing effectiveness for the life of the duct system when correctly applied in Fennimore. UL 181-rated foil tape maintains adhesion for 20 years or more in normal duct system conditions in Fennimore, WI. Both materials significantly outlast standard duct tape in duct system applications in Fennimore.
Yes. Sealing the duct system reduces the conditioned air loss the system was experiencing and delivers more of the conditioned air the HVAC produces to the living spaces in Fennimore. The reduction in leakage translates directly to reduced energy consumption for the same heating and cooling output in Fennimore, WI.
Yes for systems with return duct leaks in unconditioned spaces in Fennimore. Return duct leaks in attics and crawl spaces draw unconditioned air including dust, moisture, and mold spores into the return airstream in Fennimore, WI. Sealing these leaks eliminates the pathway and keeps the circulated air to what is drawn from the living spaces in Fennimore.
Duct sealing costs in Fennimore range from $300 to $600 for smaller systems, $500 to $1,000 for standard residential systems, $800 to $1,500 and above for larger systems, and $1,500 to $3,000 and above for systems requiring Aeroseal treatment in Fennimore, WI. All pricing confirmed upfront before work begins in Fennimore.
Yes. Every MBM Air Duct Cleaning duct sealing service is guaranteed in Fennimore. If the sealing does not produce the expected improvement within the guarantee period, we return and address it at no additional charge in Fennimore, WI.
Call Today

Ducts Losing Conditioned Air? Call MBM Air Duct Cleaning in Fennimore, WI Today.

Duct leakage pays for conditioned air that heats and cools your attic and crawl space instead of your living spaces every month in Fennimore. MBM Air Duct Cleaning quantifies the leakage with pressure testing, locates every specific leak point, seals every accessible leak with correct materials, confirms the improvement with post-sealing testing, and guarantees every service in Fennimore, WI. Call now for same-day scheduling in Fennimore.

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Our HVAC & Air Duct Services in Fennimore, WI

Duct SealingHVAC RepairAir Conditioning RepairDryer Vent CleaningFurnace RepairHeat Pump RepairEmergency HVAC RepairCommercial HVAC RepairHVAC InstallationHVAC Replacement

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