His main tools are a chainsaw, an axe to carve the wood and fire to char it. It’s a collaborative process for him: “between the artist, his material and the natural world.” Some of the sculptures are black, the wood having been charred and then oiled. This protects the pieces from insect attacks.
A picture is worth a thousand words!
Let’s see some of his excellent sculptures:

Cork Bark CC By 2.0

Cork Spire 2012 CC By 2.0

Cork Dome 2012 CC By 2.0

Three Butts 2012 CC By 2.0

Flame Column 2012 CC By 2.0

Cairn Column 2012 CC By 2.0