Floor Constructions: Screed on Decking

Using Pug Screed with Timber Suspended Floors

A variant of the 'Pug' system can be installed into timber suspended floors. Our preference is for timber boards to be fixed on battens between joists to support the system. An alternative is to use the insulation board to support the system. However if the board was to de-gas, this could result in the screed breaking away from the underneath of the floor, inhibiting the systems performance.

Alternative Installation Methods

The diagram on the right illustrates the two methods of installing a suspended 'Pug' screed between timber joists. The screed is for heat conduction purposes only and should be mixed fairly dry. Any cracking will not affect the thermal performance of the system. The screed is 25mm in depth and flush with the top of the joists for best heat transfer to the wooden floor.

Evenheat's experience indicates that pug systems installed into timber suspended first floors are very labour intensive. A plated system is recommend in preference, provided that the thermal design of the particular application does not call for the greater mass of a 'Pug' screed.

Evenheat Limited, Compton Park, Wildmere Road, Banbury, Oxfordshire OX16 3JU
Telephone: 01295 277881, fax: 01295 277556, email: