Glass Roof Regulations

Cwct technical notes 66 and 67 safety and fragility of glazed roofing.

Glass roof regulations. Guidance on specification and testing and assessment respectively and cwct technical note 92 simplified method for assessing glazing in class 2 roofs. Section b4 covers external fire spread and applies to external coverings or roofs and walls. If the amount of glazing to the extension exceeds more than 25 of the floor area section 4 2 this is then classed as an over glazed extension. When glass breaks it often forms large dangerous shards that can pose significant safety risks.

In general these are fire resistance requirements to bs476 part 3 typically aa and ab or to bs en 13501 part 5 typically broof t4. Building regulations part l1b and glass extensions there are various rules and guidelines for the use of glass in renovations and extensions as stipulated by part l1b. By heating glass at a high temperature then rapidly. Fire rated glass rooflight products are specialist and performance will depend on the standard to which they are designed.

Sap 2012 appendix r suggests a g value to the glazing of 0 63. The building must also be designed in keeping with the ventilation requirements of building regulations approved document f.