Guide to English Approved Documents F, L & O for new and existing dwellings
Document Status
Current
Supplement
Core Supplement
Abstract
Summarizes Approved Documents F, L & O for ventilation, energy efficiency, and overheating in new and existing dwellings. Approved Documents F defines three ventilation systems, setting minimum vent sizes and air permeability limits. Approved Documents L establishes U-values for windows and doors, mandates air sealing measures, and updates thermal performance calculations. Approved Documents O introduces overheating mitigation, categorizing locations by risk, limiting glazing areas, and specifying shading and ventilation to control solar gain. The guide also emphasizes background ventilation in window replacements and updates U-value calculations for doors and windows.
History
15th December 2021 edition
Subjects
- Windows
- Doors
- Materials
- Building control, England and Wales
- General purpose sheets
- Glass sheets
- Building control
- Windows and doors
- Security glazing
- Legal issues and management
Publisher History
The Glass and Glazing Federation represents employers and companies in the flat glass, glazing, window, home improvement, plastics and applied window film industries in the UK.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.