What Is Air Tightness Testing?
Air tightness testing evaluates how effectively a building’s external envelope — including walls, roofs, and floors — prevents uncontrolled air leakage.
Using a blower door system, our engineers pressurise or depressurise the building and measure the rate of escaping air. This process identifies gaps, cracks, and weak points in sealing or insulation that can increase energy costs, create drafts, and affect indoor air quality.
Why Do You Need Air Tightness Testing?
Air testing is essential for efficiency, comfort, and compliance:
Improve Energy Efficiency
Uncontrolled air leakage increases heating and cooling costs. A well-sealed building retains heat in winter and keeps cool in summer.
Boost Comfort
Eliminating drafts helps maintain consistent indoor temperatures and prevents cold spots.
Enhance Indoor Air Quality
Better airtightness reduces the infiltration of pollutants, allergens, and moisture.
Ensure Compliance
Testing is required under Part L of the Building Regulations for most new homes and commercial buildings. Certified results keep projects compliant.
What Happens During an Air Tightness Test?
Our process follows industry-approved methods:
Setup – A blower door fan is installed in a main doorway, sealing other intentional openings.
Pressurisation – The fan pressurises or depressurises the building to 50 Pascals (Pa).
Measurement – Instruments record the air leakage rate, expressed in air changes per hour (ACH).
Analysis & Report – You receive a detailed report showing whether your property meets standards, plus advice on improvements if needed.
Benefits of Air Tightness Testing
Lower Energy Bills
Reduced leakage improves efficiency and cuts utility costs.
Healthier Living Spaces
Prevents pollutants and moisture entering through gaps.
Comfort & Consistency
No more drafts or cold spots indoors.
Compliance Guaranteed
Reports are recognised by building control authorities.
Frequently Asked Questions about Air Tightness Testing
What Do the Results Mean?
The lower the ACH value, the more airtight and efficient your property is. High leakage rates highlight problem areas, which we help you resolve.
Who Can Carry Out the Testing?
Only accredited professionals can perform regulatory tests. Jigsaw’s certified team is registered under Competent Persons Schemes, ensuring results are accepted by building control.
What Types of Buildings Do You Test?
We offer:
Level 1: Domestic homes and simple buildings up to 4000m³ (new-build houses, flats, and small commercial units).
Our booking process is simple:
Request a Free Quote
Contact us online or by phone to receive an instant estimate.
Schedule Your Cleaning
We’ll arrange a convenient time.
Receive Your Report
Get certified results and improvement recommendations.
Simple and Convenient Scheduling
Whether you’re a developer, builder, architect, or homeowner, Jigsaw delivers fast, compliant, and reliable air testing. We’ll help you meet legal standards and improve your property’s energy performance.
Contact Us Today
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