residential-housing Free Quote Sound Insulation Testing | Air Tightness Testing
SAP Calculations & EPCs | Overheating Calculations | SBEM Calculations
Noise Assessments/Surveys | Energy Statements | Acoustic Design | Water Efficiency Calculations
Ventilation Testing & Commissioning | Energy Saving & Reducing Carbon Emissions Planning &
Building Regulations
Compliance Services

About Us

Formed in 2010, JosTec (formerly RJ Acoustics) are experts in numerous Planning & Building Regulations Compliance Services. We offer Sound Insulation Testing, Acoustic Design and Consultancy for Building Regulations Part E, Air Tightness Tests, SAP Calculations, SBEM Calculations and EPCs for Building Regulations Part L1, Ventilation Testing and Commissioning for Building Regulations Part F, Water Efficiency Calculations for Building Regulations Part G, Overheating Calculations for Building Regulations Part O and all types of Noise Assessments and Surveys, Energy Statements, Energy Saving & Reducing Carbon Emissions Reduction Services for Homeowners in existing properties.

Our aim is that you never need to look further than JosTec for all of your building compliance needs.

We cover all parts of England and Wales and are fully accredited/qualified in all our fields.

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20

Years of Experience

12+

Small, growing team

3000+

Satisfied Customers

Our Clients

Our Services

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SAP Calculations
& EPCS
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Overheating
Calculations
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SBEM
Calculations
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Sound Insulation
Testing
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Air Tightness
Testing
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Ventilation Testing
And Commissioning
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Noise Assessments / Surveys
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Acoustic Design
and Consultancy
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Energy & Sustainability
Statements
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Water Efficiency
Calculations
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Energy Saving &
Reducing Carbon Emissions

Case Studies

JosTec’s Integral Role in helping deliver a new community in Dagenham

New Community in Dagenham

JosTec and Sterling Rose Homes

Sterling Rose Homes

Triptych Southbank

Triptych Southbank

Air tightness testing under the Social Housing Decarbonisation Fund

Social Housing Decarbonisation Fund

Testimonials

"Thanks so much for getting everything over to me so quickly. I just wanted to express my thanks for your attitude and professionalism. We’ve had struggles with other testing companies in the past, but your efficiency and knowledge is really refreshing. We won’t look anywhere else for sound, air and ventilation testing in the future."
Jonathan Ellis
, Hamilton Court Developments, MD
"JosTec have been very professional and helpful in the air permeability and sound insulation testing for the 179 plots I have just completed. They have been very obliging in advising on the best way to achieve the results we required for this site. With fast issue of certification when required, I would certainly use and recommend JosTec for future work. Pleasure to work with."
Dean Chinsky
, Taylor Wimpey, Site Manager
"I have been dealing with JosTec for about 4 years, a really good firm who actually carried out what they promise. Always good to take advice from them from the outset, so that when you come to your final results there won’t be any surprises. A dynamic firm which really satisfied the needs of the building industry, very resourceful and informative and good value, friendly and easy to get on with, and who will go the extra mile for you. I have used them on all my sites."
Neville Nash
, Zibcrest Homes, Director
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Latest News & Blog

More News
Achieving Level 5 Certification in Non-Domestic Energy Assessment
November 21, 2024

Exciting News from JosTec: Achieving Level 5 Certification in Non-Domestic Energy Assessment

Budget 2024 changes impacting homes, property, and construction
November 6, 2024

Budget 2024: Changes to Homes, Property and Construction

Common Mistakes in Building Regulations Compliance and How to Avoid Them
October 31, 2024

Common Mistakes in Building Regulations Compliance and How to Avoid Them