- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 24 Jun 2020
Domestic floors: Part 1: Construction, insulation and damp proofing
Domestic floors: Part 1: Construction, insulation and damp proofing (GG28/1 revised 2015) was written by Rupert Pool and Chris Scivyer, and published by BRE on 30 March 2015. It is part 1 of a 5-part Good Building Guide that considers the construction of new and replacement domestic floors and their repair. It updates guidance published in 1997.
The 8-page part 1 describes ground floor construction in new buildings and in refurbishment work where floors are being replaced. It is concerned mainly with domestic buildings, but some recommendations will also apply to other types of building.
It describes the types of ground floors commonly used in domestic properties; ground-supported concrete slab floors, suspended concrete floors (including beam and block) and suspended timber floors. It provides information on how to construct each type of floor and gives advice on the positioning of damp-proof membranes (DPMs) and thermal insulation.
In particular, it gives details of; damp proofing, vapour-control layers, drying times for concrete bases and screeds, positions for thermal insulation. It does not deal with; structural requirements, specific values or thicknesses of thermal insulation, requirements for the exclusion of radon and methane or heated screeds.
The contents of part 1 are:
- Ground-supported concrete slabs.
- Suspended concrete (beam and block or plank).
- Suspended timber.
- Screeds for concrete bases.
- Thermal insulation and membranes for concrete bases.
- Further reading.
 Find out more.
 Related articles on Designing Buildings Wiki
- BRE articles on Designing Buildings Wiki.
- BRE Buzz articles on Designing Buildings Wiki.
- BRE Buzz.
- Building Research Establishment.
- Concrete slab.
- Damp proofing.
- Damp-proof membrane.
- Floor definition.
- Floor insulation.
- Flooring defects.
- Insulation for ground floors.
- Laminate flooring.
- Thermal insulation.
- Types of flooring.
- Vapour-control layer.
Featured articles and news
The initiative to enhance the environment continues.
Could underused community spaces offer an alternative to working from home?
Keeping workers and workplaces safe in the United States.
A history lesson in geographic information systems.
A low tech, easy to use method of extinguishing small fires.
How can these valued spaces be reused?
Partnership avoids the need for listed building consent.
Connecting building design from inception to completion to operations.
Gregor Harvie predicts interoperability will be construction’s Uber moment.
Expert commentary and insight.
Guidance offered for stained glass window maintenance.
Define need before determining viability.