Wimpey No Fines

Constructed from cast in-situ concrete, No-Fines was one of the most successful system built houses. More than 300,00 were built by George Wimpey & Co Ltd in the 1940'2 right through to the 1960's, with varying styles including houses, bungalows, maisonettes and low-rise blocks of flats.

The wall construction contains no sand fraction using 1/2" to 3/4" stone aggregate mixed with cement. This creates a honeycomb type structure within the concrete. The construction of the system is similar to that of traditional solid walled masonry properties and offers a high level of robustness.

The external walls range from 8 to 12 inches in thickness, with reinforcement bands at first floor level.

Potential Problems

The overall condition of these structures is considered to be good, requiring minimal attention in the way of concrete repairs. However the pebble dash render finishes can vary in condition. The quality and cracking of the facade can be from foundation movement to spalling of the render finish.

Common positions these occur are party wall movement joints being rendered over, vertical cracking above communcal passageways and horizontal cracking above render drip details above windows. The installation of external wall insulation can easily bring the house within the latest building regulations for thermal performance.


Improved high thermal targets can be achieved from 0.30 U-value onwards using the different insulation types and thicknesses as be determined by the specification requirements.

System Components - Options to suit specification requirements

  • Lambdatherm Grey EPS Insulation Boards
  • White EPS Insulation Boards
  • Phenolic Insulation Boards
  • Insulation Adhesive
  • Insulation Fixings
  • Basecoat
  • Reinforcing Mesh

Topcoat Finishes to Select From

  • Dash Aggregate
  • Silicone/Acrylic Topcoat
  • Envirobrick "brick effect" render
  • Granomin & Nanosil Finish Topcoat
  • Brick Slip Systems
  • Colour samples are available on request for the different finishes

For a full technical consultation, survey and project specific report and specification please contact our technical department on 0845 1300 983 or email at info@spsenvirowall.co.uk