Blower Door Test in Delmar, DE

Confirm your home’s energy performance and identify leaks through accurate blower door test in Delmar, DE. Our certified professionals work with homeowners, builders, and contractors to uncover hidden air leaks and guarantee compliance with DE energy codes.

What Is A Blower Door Test?

A blower door test measures how many air changes per hour occur in your home, ensuring fresh air circulation and improved indoor air quality. Too many air changes can negatively impact efficiency, as every replacement of indoor air demands additional heating or cooling energy. When too much air is exchanged, it can cause drafts, reduce comfort, and create conditions for moisture buildup and mold. A blower door test in Delmar, DE detects early-stage air leaks, enabling effective energy use and a more durable, comfortable living environment.

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How Is A Blower Door Test Conducted?

When performing blower door test in Delmar, DE, the technician ensures all exterior doors and windows are sealed and interior doors are open for steady air movement. One main exterior door is identified, and an adjustable aluminum frame with a fabric panel is securely attached. A calibrated fan is used to depressurize the home through the frame to 50 Pascals, representing the same pressure as a 20 mph wind.

When the fan pulls air out, outdoor air enters the house through cracks, openings, and unsealed areas. Using a nanometer device, we assess how the pressure from the fan differs from the home’s natural air pressure. The collected data converts to air changes per hour (ACH), demonstrating how tightly sealed and efficient the home remains in DE climates.

What Is A Passing Blower Door Test Score?

In Delmar, DE, homes are designed to meet or exceed the 2015 International Energy Conservation Code (IECC) or the latest locally adopted standards. In most cases, passing the blower door test means reaching 3 air changes per hour or less, proving efficient home sealing. Meeting this requirement during your blower door test in Delmar, DE helps reduce energy costs while keeping your home compliant with local building codes.

Why Do I Need A Blower Door Test?

The State of DE and its local governments follow the IECC standards, which require blower door test on newly built or remodeled residential dwellings. We specialize in helping home builders, contractors, and homeowners with blower door test in Delmar, DE to achieve energy code compliance and finalize inspections. In some cases, a duct leakage test is needed if ducts or HVAC systems lie outside the home’s thermal envelope. Learn more about energy code compliance.

A blower door test in Delmar, DE helps homeowners discover inefficiencies. Depressurizing the home makes leaks more noticeable and highlights where energy can be conserved. A blower door test usually takes just a few hours but delivers a long-lasting impact on your home’s comfort, performance, and efficiency—particularly during DE’ hot summers and cool winters.

How To Pass A Blower Door Test:

Anticipate potential air leaks before testing begins.
Apply an appropriate air barrier, such as Tyvek or Zip Sheathing, making sure every seam is correctly taped for maximum performance.
Install insulation that meets the required R-value and check that it’s evenly and securely placed throughout the building envelope.
Seal all penetrations in exterior walls using caulk or spray foam.
Ensure doors and windows are properly installed, caulked, and weather-sealed.
Seal the transitions between conditioned and unconditioned zones, particularly around basements, attics, and crawl spaces.
Many local building offices offer a step-by-step checklist to confirm compliance — view the Philadelphia sample here.
Our professionals at Local Energy Audits use caulk, spray foam, and thermal imaging to detect and seal leaks on-site for better efficiency./li>
Over 90% of projects pass within two hours, and we immediately provide the required paperwork to close out the building permit.

Preparing for a Blower Door Test in Delmar, DE

For blower door test in Delmar, DE, preparation includes turning off all heating and air conditioning units, plus bathroom and kitchen exhaust fans. Next, we conduct a quick walkthrough of the home, confirming that all exterior doors and windows are securely closed — including those to unfinished basements, garages, or any area outside the thermal envelope. After ensuring the home is airtight, we install the blower door frame and fan in a central exterior door and depressurize the house to 50 Pascals to record airflow and leakage data accurately. Once pressure is lowered, outdoor air moves in with greater force, highlighting problem areas and leaks. A thermal imager helps us visualize temperature differences in walls, ceilings, and surfaces that separate conditioned and unconditioned spaces. We carry chalk, spray foam, and weatherstripping so our team can work alongside homeowners or contractors to seal visible air leakage spots right away. After all leaks are sealed, we retest immediately to confirm the desired blower door score has been met and that your home satisfies efficiency requirements in Delmar, DE.

Blower Door Test for Contractors in Delmar, DE

Most professionally insulated homes undergoing blower door test in Delmar, DE can resolve small issues on-site during the contractor’s visit. Using quick-application materials like chalk and spray foam, small leaks or openings are sealed right during testing. In more than 90% of cases, we achieve a passing blower door test score within two hours and deliver all documents needed to finalize the permit without any delay.

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Schedule Your blower door test in Delmar, DE

Trust our experienced team for quick, accurate, and certified blower door test in Delmar, DE. Whether you’re enhancing indoor comfort or finalizing a construction permit, we conduct every test with accuracy, care, and full compliance with energy standards.

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