Apex Home and Energy Surveyors Ltd Excessive Glazing Calculations

Excessive Glazing Calculations

If you're adding a new extension to your home with lots of glass, like big sliding doors, wide windows or a fully glazed back wall, you might need an Excessive Glazing Calculation to meet Building Regulations. Here at Apex Home and Energy Surveyors Ltd, we make this process quick and straightforward, so your project keeps moving without delays.

Money Back Guarantee!

We have a 100% record when it comes to proving compliance for extensions with excessive glazing. Email your drawings today and we’ll provide you with an extremely competitive quote.

If we can’t prove compliance, we’ll issue a full refund!

Building Regulations allow you to use glass for up to 25% of the floor area of your extension without any extra checks, but modern designs often go beyond that especially when using bifold or sliding doors.

Once you go over the 25% limit, you’ll need to show that your home will still be energy efficient and that’s where our service comes in.

We carry out Excessive Glazing Calculations using a type of energy assessment known as a SAP calculation (Standard Assessment Procedure). This is a Government-approved method used to measure the energy performance of homes.

We will compare the energy efficiency of your proposed extension with a version that sticks to the standard glazing limits. If your design performs just as well, or better, then it passes.

You don’t need to worry about the technical side. We deal with all of that and can work directly with your builder, architect or Building Control if needed. Our reports are clear, accurate and turned around quickly, helping you stay on schedule.

All our calculations are handled by qualified, in-house assessors. If any tweaks are needed to meet the regulations like better insulation or improved glazing, we’ll give you straightforward advice to get things sorted.

Not sure if your extension needs this? Just get in touch and we’ll guide you through it. We’re here to help make sure your home stays warm, efficient and fully compliant.