I don't know.
"They are also grown for their durable (decay-resistant) scented wood,resistance to weather, such as shakes and shingles. Cedar wood and cedar oil is known to be a natural repellent to moths,[16] hence cedar is a popular lining for modern-day closets in which woolens are stored. This specific use of cedar is mentioned in The Iliad (Book 24), referring to the cedar-roofed or lined storage chamber where Priam goes to fetch treasures to be used as ransom. Cedar is also commonly used to make shoe trees as it can absorb moisture and de-odorise." From wiki.
There are a bunch of species, but none known as western cedar (unless you go to the Home Depot).
"There are five taxa of Cedrus, assigned according to taxonomic opinion to two to four different species. A majority of the modern sources[5][6][7][8][3][9][10] support the four species concept:
* Deodar or Deodar Cedar, Cedrus deodara (Roxb.) G.Don. Western Himalaya. Leaves bright green to pale glaucous green, 2560 mm; cones with slightly ridged scales.
* Lebanon Cedar or Cedar of Lebanon Cedrus libani. Mountains of the Mediterranean region, from Turkey and Lebanon west to Morocco. Leaves dark green to glaucous blue-green, 825 mm; cones with smooth scales; two subspecies:
o Lebanon Cedar Cedrus libani subsp. libani Mountains of Lebanon, western Syria and south-central Turkey. Leaves dark green to glaucous blue-green, 1025 mm.
o Turkish Cedar Cedrus libani subsp. stenocoma (O.Schwarz) Davis. Mountains of southwest Turkey. Leaves glaucous blue-green, 825 mm.
* Cyprus Cedar Cedrus brevifolia (Hook.f.) A.Henry (syn. Cedrus libani subsp. brevifolia (Hook.f.) Meikle). Mountains of Cyprus. Leaves glaucous blue-green, 820 mm.
* Atlas Cedar Cedrus atlantica (Endl.) Manetti ex Carrière (syn. Cedrus libani subsp. atlantica (Endl.) Batt. & Trab.). Atlas mountains in Morocco & Algeria. Leaves dark green to glaucous blue-green, 1025 mm."
I still think that if you have proper ventilation, planks are not going to be a problem. (but don't forget to vote for the rep. or senator who will give me millions to study this