Guidance

Solid floor insulation (SFI): best practice

Guide for designers, surveyors and installers considering the suitability of solid floors to receive internal thermal upgrades.

From:
Department for Energy Security and Net Zero and Department for Business, Energy & Industrial Strategy
Published
13 June 2022

Documents

Solid floor insulation: guide to best practice

PDF, 381 KB, 41 pages

Details

This guidance provides best practice for installing solid floor insulation (SFI) and covers:

  • assessing the technical viability of insulations and systems in potential scenarios
  • selecting materials based on hygrothermal understanding and installation best practice
  • safe methods of achieving the best possible solutions

It is recommended for anyone undertaking solid floor insulation, including:

  • designers
  • surveyors
  • installers

Some sections are written specifically for the retrofit assessor or surveyor, the retrofit designer or the retrofit installer, and are labelled as such.

The guidance is relevant to all installations of this type, regardless of whether it is being delivered under a government scheme.

Updates to this page

Published 13 June 2022

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