If I specify Clear All Heart redwood, will it always be kiln dried?

This stamp indicates
redwood lumber is
Certified Kiln Dried.

Not necessarily. The proper specification for any wood product should include more than just the size and grade. The desired moisture content, type of grain (flat or vertical), surface texture (smooth or saw-textured) pattern description and pattern number where applicable, should all be included in the specification.

for more information on redwood grades view the Adobe Acrobat version of Redwood Grades & Uses