“In-situ” means in position, which for timber construction means on site. Timber in-situ, especially as it gets older or where recent interventions have led to changed conditions, may require a survey. It needs careful surveying to check structural integrity without damaging or affecting the timber itself.

In-situ assessment methods can provide useful initial information before engaging in non-destructive testing. This Timber Knowledge Sheet provides an essential introduction.

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• Timber Assessment