Blog
Plain-English guides to SAP Calculations, Part L compliance and energy assessments for builders, architects and self-builders.
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Design SAP vs As Built SAP: What Builders and Designers Need to Know
Design SAP is needed before work begins. As Built SAP confirms compliance at completion. This guide explains the difference and why both…
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SAP Calculations for Extensions: Understanding the 25% Rule (Without the Confusion)
Understanding the 25 percent glazing rule is key when planning an extension. This guide explains how it works and the different routes…
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What is SAP 10? And How it Affects Your Building Project
SAP 10 sets a higher bar for energy performance and leaves less room for vague specifications. Here’s what changed from SAP 2012…
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Why SAP Calculations Fail: The Most Common Issues and How to Fix Them
SAP calculations rarely fail because of one major issue. More often it’s a mix of optimistic assumptions, design changes and small specification…
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