What do I need to provide for Part O assessment and which method should I choose?

Which method should I choose?

If you don't know the differences between Simplified Method and Dynamic Thermal Modelling, we advise you to download the .pdf document from link below. It will allow you to better understand both methods and choose the more appropriate one.

2.  Elevations

We need you to provide the elevations with windows that have frame and opening (top / bottom / left / right / central etc.) marked on the plans. It will allow us to calculate the equivalent areas of openings.

3.  Sections

Make sure the section will show the window (including inner windowsill length, outer windowsill length and height to sill). It enables us to assess the window opening against protection from falling.

Please provide more sections if windows have different specifications (e.g., window A height to sill is 1.1 m, while window B height to sill is 0.8 m).

4.  Window openings & window sizes

Please check your elevations drawing before sending the file to us. We need the window to be drawn with glazing area, opening heights and widths clearly shown on the drawings.

A separate document with window schedule and details (frame sizes etc.) can be supplied to support the information.

Note: The more detailed the information the more likely we are to be able to confirm compliance and provide solutions if not compliant. Hand drawings can be difficult for us to finish the assessment.

5. Other considerations

Have noise and pollution been assessed? Are there any reports to support this?

Have the protection from falling and security strategies been incorporated in the design?

6. Additional information required for Thermal Modelling

To complete TM59 Thermal Model we will also need:

• Construction,
• ventilation systems specification,
• proposed windows U and G values,
• summer overheating strategies.