We are doing a self build and are wondering if our posi joists and roof trusses should be treated?

The trusses will not be left open to the elements and will be covered with felt immediately.

Many thanks

Marie Davison

  • Vince Holden - Construction Project Manager Holden

    Usually, the timbers used for trusses and joists etc are pressure impregnated (treated) before manufacture.

    Vince Holden ACIOB
    Holden Mangement Services

  • Tim Pullen

    We can argue whether or not it is necessary but it is entirely usual for the timber to be treated before manufacture.

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