The roof deck is the continuous layer of boards or sheet material forming part of the roof construction. Coverings and intermediate layers are arranged in relation to this substrate.
What does this mean on your roof?
The deck may be concealed by finishes and consequently unavailable for complete inspection during an initial visit. The condition of one exposed corner does not establish the state of the entire roof.
Known damp locations and photographs from earlier opening work can help focus investigation without assuming hidden components are sound.
A renovation quotation should identify whether examination and possible repair of the deck are included. If its condition only becomes clear after opening, agree how findings and additional work will be discussed. The deck is not synonymous with the entire supporting structure; questions about load capacity may require separate structural assessment.
Frequently asked questions
Is decking the same as the roof covering?
No. The deck is a construction substrate; the covering provides the external protective finish.
Does local damage require replacing all decking?
Assess the extent and relationships first. One local observation does not determine the whole scope.