Over glazed Extension's
‘Over glazed extensions’ such as orangeries, sun rooms or glass rooms, as
they are also known are highly popular in many homes. Typically, as an extension
to a ground floor room, as well as being glass-heavy with windows in the roof,
the room usually has bi-fold doors that lead out into the garden.
• If the amount of glass used in the extension exceeds 25% of the floor area, and it is not thermally separated from the existing building, then the extension will not be deemed compatible with L1B building regulations.
• In this case, you will need to prove compliance and an energy rating using a ‘SAP’ calculation.
• We will need to see a copy of your extension architectural plans, as well as your existing property.
• These must be to scale and include floor plans, and are acceptable in Autocad, PDF or hard copy formats.
• The calculations will need to prove that the CO2 levels from your home are within legal limits and that the proposed extension falls within acceptable boundaries.
• Improving insulation or updating an old boiler may well be all that is required.
• We will provide an extensive report to building control with the full supporting calculations.