This technical bulletin is currently under review with a view to new guidance being published.

If using the current version please note the following:

  • It is no longer permissible to place a conservatory on Schedule 1 of a design certificate so Section 1.6 of the Technical Bulletin no longer applies.

We would welcome any comments you have about the guidance that should be given to Certifiers on Certifying the Structural Design of Conservatories. Please send comments to