Regulation

There are 2 cases, building a new roof and renovating or repairing an existing one.

Good to know: As a roofer, you are requested to know the building regulations and you must ensure a proper installation. Keep an eye on the new requirements.

Useful websites

• NFRC
• Government Building Regulations
• HSE
• City & Guilds

New roof

A new roof must ensure:  

• Weather resistance (waterproofing, resistance to wind, adequate drainage...)  
• Load resistance for instance snow load
• Resistance to heat loss 
• Fire resistance depending on your project 
• Ventilation. 

 Of course, a new roof usually means a work permit.

Existing roof

A permit may be required if

• The repair or reroofing is more than 25% of the roof area
• You may cause structural alterations, even cracks in the structure
• You change the roof performance, like a lower fire resistance.