Standard Assessment Procedure (SAP): Everything You Need to Know
By Fluid Labs
/ January 21, 2026
SAP (Standard Assessment Procedure) is the UK’s method for assessing the energy performance of residential buildings and plays a key...
Read MoreAbout 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.
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.
Read More20+
Years of Experience
12+
Small, growing team
3000+
Satisfied Customers
Our Services
Explore our comprehensive range of services designed to help you navigate the complexities of building regulations and compliance.
Latest News and Blog Posts
Stay updated with our latest news and blog posts. We cover a wide range of topics from building regulations to energy efficiency and sustainability.
Air Tightness Testing: Everything You Need to Know
By Fluid Labs
/ January 21, 2026
Air tightness testing is a crucial part of delivering energy-efficient, regulation-compliant new buildings. If you’re a developer, builder or self-builder,...
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Are Sound Testing and Noise Testing the same thing?
By Hubbl Marketing
/ April 10, 2024
When it comes to assessing the acoustic performance of buildings, the terms "sound testing" and "noise testing", amongst many other...
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Progress of Building Control Surveyor Registration Falls Short of Expectations
By Hubbl Marketing
/ March 6, 2024
By April 6th, all building control surveyors must be registered with the Building Safety Regulator (BSR). However, as of January...
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What Landlords need to know about changes to EPC rating requirements
By Hubbl Marketing
/ November 1, 2023
In late September, the Government made a significant policy shift regarding energy efficiency standards for rental properties. On September 20th,...
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The Truth About Air Source Heat Pumps
By JosTec
/ September 5, 2023
After the government announced that its air source heat pump scheme has missed its first-year target, we explore why this...
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Part F of UK Building Regulations Explained
By JosTec
/ April 18, 2023
Part F of the UK Building Regulations focuses on ventilation, which is an increasingly important aspect of building design and...
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Airborne Sound Explained
By JosTec
/ December 15, 2022
When building, converting, or generally making improvements to a building, sound insulation is a consideration that cannot be overlooked. There...
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The Construction Industry in Post-Pandemic Britain
By JosTec
/ November 22, 2022
Post-pandemic Construction in the UK As the UK economy, the war in Ukraine and Climate change continue to occupy the...
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What Is Sound Insulation Testing?
By JosTec
/ May 9, 2022
Put simply, Sound Insulation Testing is a test carried out to check the sound insulation performance of certain elements of...
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Case Studies
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Elmhurst Accredited for energy assessments
SITMA registered for sound insulation testing
ATTMA registered for air tightness testing