FAKRO - Secure Manually Operated Flat Roof Window (DMF-D) door What is the minimum time

What is the minimum time I need to leave Levelling Mortar to set

and quieter year round

For continuous use

Heat Transmission coefficient (U-value): 1

particularly in homes with small children

FAKRO - Secure Manually Operated Flat Roof Window (DMF-D) door What is the minimum timeThe Fakro DMF DU6 Secure Manual Flat Roof Window delivers the perfect balance of security, natural light, and manual ventilation. Designed with triple glazed DU6 Secure glass, this high performance rooflight provides exceptional insulation and peace of mind. Ideal for both residential and commercial flat roof applications, it offers controlled ventilation alongside industry leading burglary protection and a refined, contemporary finish. Key Features