Trickle Vents, Building Regulation Approved Document F (Ventilation), are they required for replacement fenestration?
The Building Regulations Approved Documents N (Safety Glazing) and L (Thermal Insulation) are prime requirements for replacement windows and doors. Other elements of the Building Regulations A (Structure), F (Ventilation), B (Means of escape), J (Combustion Appliances and Fuel Storage Systems), M (Disabled Access) must not be compromised by the replacement installation. Compliance with the Gas Safety (Installation and Use) Regulations 1998 is essential. If there is any doubt about the original compliance with the Regulations, the installer must collect evidence of the features of the original installation. It may be that ventilation in the ‘partially open’ position will be acceptable in some circumstances (see the guidance in Approved Document F (Ventilation)). However, it will be good practice to offer trickle ventilation to customers to improve ventilation and help with the control of condensation. If there is any doubt about achieving compliance with regard to any of these matters,
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