We've successfully completed SAP calculations (heat loss assessments) for countless highly glazed extensions, navigating various complexities and limitations.
Our 100% Compliance Rate is Your Guarantee
We boast a 100% success rate in achieving compliance with Approved Document L for highly glazed extensions. This means you can be confident your design vision won't be compromised when you choose us for your extension's SAP calculations.
Let us help you achieve your dream extension while ensuring regulatory compliance!
0123 4567 890
SAP Calculations for Extensions
(Heat Loss Calculations)
Heat Loss Calculations for Highly Glazed Extensions – Expert Assessment & Advice to Guarantee Compliance
Building a beautiful extension with expansive glazing like an orangery or garden room? SAP calculations can ensure your vision aligns with building regulations (Approved Document L: Volume 1) through the 'Design Flexibility Criterion.'
These calculations, often referred to as "heat loss calculations," assess your extension's energy efficiency, which is particularly important with extensive glazing elements like bi-fold doors, large windows, and rooflights. Building control bodies are increasingly requesting SAP calculations for extensions with high glazing levels due to potential heat loss concerns. Don't worry, we can help! Our expertise can guide you through the SAP calculation process for your glazed extension project, ensuring it meets regulations without sacrificing your design aspirations.
For any inquiries or a free quote on SAP Assessments, contact us at 0123 4567 890 or complete the form below.
Do I need a SAP Calculation for my Extension?
Building regulations (Approved Document L: Volume 1) limit glazing in extensions to 25% of the new floor area (including existing windows removed) to prevent excessive heat loss. Glass typically has lower thermal performance compared to well-insulated walls and roofs.
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Extensions complying with this 25% limit don't require mandatory SAP calculations.
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However, the growing desire for bright, airy spaces often leads to designs exceeding this limit. In such cases, SAP calculations become necessary.
When extension designs surpass the 25% glazing allowance outlined in Approved Document L: Volume 1, building regulations offer a "design flexibility" option. This allows you to proceed with your desired design if you can prove the completed dwelling will be as energy efficient as if a standard extension with less glazing had been built.
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One way to demonstrate compliance through this "design flexibility criterion" is by providing a SAP Calculation to the Building Control Body (BCB). This calculation assesses the entire dwelling's energy efficiency, taking into account the extension's increased glazing. By demonstrating that the overall efficiency meets regulations, you can achieve your dream extension with more glass.
How can Big Boss help with SAP Calculations?
We would like to establish long-term collaborations with real estate agents and independent contractors by providing exceptional customer service and dependable technical advice.
Our SAP Calculation service includes all necessary guidance and suggestions as part of our commitment to make sure your project complies with the relevant building regulations in a sensible and economical way.
Requirements for compliance shouldn't keep you back! Our accredited assessors and energy consultants have the know-how to identify and address your difficulties on your behalf.
Independent & Cost-Effective
We focus solely on energy compliance services. Free from material sales or commissions, we prioritize providing the most cost-effective solutions to meet your compliance needs.
Competitive Pricing
We offer clear, affordable, all-inclusive fixed fees, with large savings offered for multi-unit constructions.
Expedited Service Available
We are aware of how quickly things are developing. Give us a call if you need energy calculations or pressure testing right away, and we'll do everything we can to assist.
Client Focused
We design our services with you and your unique needs in mind. In our industry, a one-size-fits-all strategy is not appropriate.
One Stop Solution
Our wide range of additional services, which we offer from planning to completion, helps to simplify our clients' compliance requirements.
Ongoing Technical Support
Plans and specifications are subject to change. To avoid any regulatory issues when a development is finished, we are accessible to offer technical support during the entire process.