Code 4 first floor - timber floor

The first floor of the Code 4 home has been constructed using 220mm deep timber I-joists from Finnforest at 400mm centres. They comprise a timber flange, typically solid timber or LVL (laminated veneer lumber) and a panel product web, usually OSB (oriented strand board). The floor is finished with 22mm tongue and groove chipboard and 12.5mm plasterboard to the underside. 100mm of mineral quilt is laid between the joists to achieve the sound insulation required by Approved Document E.

They offer a number of benefits over traditional sawn joists, including low weight, no moisture movement and greatly reduced risk of squeaks. The floor specified in the Code 4 home is 220mm deep timber I-joists from Finnforest at 400mm centres. The floors have been designed and supplied by Cox Long, part of the Walker Timber Group.

Further information

See more information on the Cox Long website (new window).

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Did you know?

Fact 9

Concrete can be dense or lightweight and this choice affects its thermal behaviour. In either case, concrete can act as a thermal sink or as an insulator. In some buildings you can see masonry concrete doing both.

See the more information on Why Masonry?