Large format boards for a classic deck

Redwood Decking Timber

Grades Of Redwood Decking

There are 2 grades of redwood for Decking, varying in appearance. Redwood can be ordered in standard dimensional timber sizes. Kiln-dried is more expensive but is recommended due to higher stability which is helpful for tight joinery like for rail parts. The three principle grades: Heart Premium and Heart decking grade and Heart Colour clears.


Heart colour clear redwood grade should not be used for decking grade, as this Redwood contains sapwood which does not weather well in New Zealand climate but is a sort after internal future timber. 

Heart Premium  – This is a premium grade that offers knot free surfaces. Because of its high expense it is usually only used for rails and trim on decks. Clear Heart grade contains no grading defects. It is normally certified as Kiln-dried. 

Heart Decking Grade – Tight Knot Heart is graded for strength allowing for green or tight knots. The knots are graded to ensure they do not exceed in size 30% of the face of the board. This is also the most popular timber choice for cladding.  


Nick 0272 792 679

Waikato, New Zealand

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