Passivhaus consultants

We can help your building project achieve a PassivHaus standard 

Over Glazed Extensions

Low Carbon Box provide SAP Calculations for your new extension if the total external openings are in excess of 25% of the extension floor area PLUS any external opening blocked up as a result of the extension.

WHY USE US?

EXPERTISE

We are accredited Energy Assessors. We can rapidly input the information.

PROJECT SUCCESS

We have a 100% success record. If any element of the extension needs improving to pass, we will let you know.

EXPERIENCE

With over 25 years experience in architectural projects, we understand what is needed to succeed.

ADDED VALUE

We have carried out many of these calculations so can complete quickly, efficiently and therefore within budget.

WHAT WE DO Steps in our work

LOW CARBON BOX can join the team at any stage and will always target simple, low cost solutions where possible.
We recommend out services from early design stage to ensure the impact of achieving Building Regulation compliance is minimised and allows easy integration with a successful outcome.

INITIAL ASSESSMENT

We will check the scheme cannot pass based on external openings being less than 25% of the extension floor area PLUS the area of openings blocked up as a result of the works.

BASECASE VS DESIGNED EXTENSION

We will carry out SAP calculations of the property with a ‘compliant’ extension and compare it with your extension.

FEEDBACK

If elements of your design need to be improved (i.e. better insulation), then we will let you know so the scheme can achieve compliance.

AS BUILT SBEM CALCULATIONS

We issue the SAP calculations and a summary report which outlines the results and confirms why the proposed extension meets Part L1B of Building Regulations.

RECENT PROJECTS

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