TR-02 – Strip Foundation, Cavity Wall and Ground-Bearing Slab

This strip foundation detail coordinates a rendered masonry cavity wall with an insulated ground-bearing concrete floor slab.

It is intended for architects, architectural designers, technicians, builders and self-builders developing construction and Building Regulations drawings. For a plain-English introduction, see our related foundation guide; Approved Document A provides the official structural guidance.

What This Strip Foundation Detail Includes

Supporting notes cover:

• Typical strip-foundation sizes and depths.
• Foundation concrete and ground preparation.
• Stepped-foundation requirements.
• Ground-bearing concrete floor construction.
• Damp-proof and radon-barrier installation.
• Typical rendered cavity-wall construction.
• Wall ties, mortar and cavity cleanliness.
• Thermal continuity and typical performance targets.
• Junction SAP reference E5 and the calculated PSI value shown on the drawing.

The customer receives one downloadable PDF construction drawing, drawn at 1:10 and formatted for printing on an A3 sheet.

This is a generic construction detail for use when developing project-specific construction and Building Regulations drawings. Foundation dimensions and specifications must be confirmed to suit the building loads, site investigation, local ground conditions, proximity of trees and drains, structural design and Building Control requirements.