Color Contrast and Resistance to Elements
Both sapwood and heartwood have similar grades categories - Construction, Selects, Clears and Near Clears - but these grades have nothing to do with SapWood or HeartWood. The Grades categories are only specifications of how many knots/flaws are allowed in the grade.
A SAP Redwood Siding order will contain a mix of boards with heartwood and sapwood usually on the same board. A designation of HEART allows NO sapwood. The only way to get all RED color and none of the lighter sapwood is to specify "all heart".
This comes at a price since there is less heart in the world and manual selection of timbers is required to assure the ALL HEART designation.
To clarify - unless the word HEART appears in your order there is no limit on the amount of white wood allowed (though most self respecting mills fulfill Redwood SAP orders with 50/50 split heart to sap).
REDWOOD SIDING PRICES
Supply is limited and pricing inconsistent because the costs of production vary significantly as stock diminishes.
We try to post prices on the web for all our products. But with redwood the size, grade and pattern you want may not be millable from stock on hand close enough to your job site to accurately predict pricing on our website.
For the moment we can still source redwood from the old timer mills who stockpiled redwood timbers in a past era. But it is hard to advertise prices online since they change frequently and are dependent on inventory in hand at time of inquiry.
We will keep our Sap B "Near Clear" grade Redwood siding pricing until that stock runs out and then it will be call for quote from now on. If you want this beautiful wood on your home I suggest doing it this year because it just might not be here the next.