Duct Sealing & Insulationin Coral Gables, FL
Measured duct leakage testing and sealing so the air you pay to cool reaches the rooms.

Duct Sealing & Insulation for Coral Gables buildings
Ducts added to a 1930s house decades after it was built are frequently undersized, patched and leaking into an unconditioned attic. The dense tree canopy the city is known for also means more pollen, leaf mould and humidity around the house. Duct sealing and proper dehumidification usually do more for comfort here than a bigger air conditioner.
Typical duct systems lose a significant share of their air through leaks at joints and connections. In a Florida attic that means cooled air is lost into a space that is hotter than outdoors, while return leaks draw humid, dusty attic air into the house.
We measure leakage with a duct pressure test before and after the work, so you have a figure to judge the result by.
Why seal the ducts
- Lower run times and electric bills
- More even temperatures between rooms
- Lower indoor humidity
- Less dust entering through return leaks
- A smaller, cheaper system may be enough at the next replacement
How it works
- We pressure-test the duct system and record total leakage.
- We seal joints, boots and plenums with mastic and approved tape.
- We repair or add insulation where it is missing or damaged.
- We retest and give you the before and after numbers.
Duct Sealing & Insulation in Coral Gables: questions
Is duct sealing worth it on an older home?
Older homes usually benefit most, as long as the duct material itself is still sound. If the ducts are deteriorated, replacement is the better investment and we will say so.
Is a permit required for HVAC work in Coral Gables?
Installing or replacing air conditioning equipment in Coral Gables requires a mechanical permit and a final inspection. Permits here are issued by the City of Coral Gables Development Services Department. Repairs, maintenance and cleaning do not need one. We file the paperwork and attend the inspection.
Can you install central air in a historic Coral Gables home?
Yes. Depending on the house we use a high-velocity small-duct system, ductless mini splits, or a conventional system routed through closets and soffits. If the home is a designated landmark or sits in a historic district, visible exterior equipment may need review by the city's Historic Preservation office, and we prepare the drawings for that.
Does Coral Gables have rules about where the outdoor unit goes?
The city's zoning code regulates the placement and screening of mechanical equipment, and it is stricter than most of Miami-Dade. We confirm setbacks and screening requirements before the permit is filed, so the installation passes inspection the first time.
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Duct Sealing & Insulation in Coral Gables
Call (786) 856-7466 for the next available appointment in Coral Gables.