Got questions about building regulations and fenestration? Join this Q&A session to get answers to your burning question:

• What’s the difference between Doc Q and PAS24. Is it applicable to extensions? Why is 6.8mm glass required over 6.4mm?
• Are listed buildings exempt from building regulations? Can I register them to FENSA?
• U-values and energy ratings
• What alternatives to trickle vents are acceptable?
• Fire safety – egress requirements and stopping