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Kiln Dried
Cedar shingles and shakes can be kiln dried for a number of reasons explained below:
Reduce shipping weights - in some cases it is advantageous to reduce the shipping weight of shingles in order to
load a larger quantity of product into a truck or container and reduce the shipping cost.
Easier handling and storage - some dealers prefer to have product kiln dried as it is lighter and easier to handle. It
also helps stabilize the relative humidity conditions in some indoor storage warehouses.
Fire Retardant Treatments - all product is kiln dried prior to pressure impregnation in ensure full absorption, and
then kiln dried after as part of the chemical process to permanently fix the treatment into the cells of the wood.
Improve stability - in cases where products are to be used on the interior or exterior sidewall, kiln drying will reduce
shrinkage and movement after application.
Acclimatization - fresh cut, green/air dried shingles, especially during the wet winters of the Pacific Northwest can
maintain a very high moisture content. If shipped and quickly applied in hot and dry climates, (i.e. Texas) some
checking and cell collapse can occur due to the product drying too quickly. We recommend that rather than kiln
drying shingles in these cases that they are left to acclimatize naturally, like any other wood product, prior to installation.
Agricultural Phyto-sanitary controls - many countries worldwide require proof that any imported agricultural
products, including wood products be kiln dried, heat treated or fumigated to ensure unwanted biological matter
enters their country.
CCA
CCA CCA + Kiln Dried
Pressure Preservative Treatment: Long term protection from fungal decay is provided with factory pressure
treatment of preservatives that will extend the life of Cedar shake or shingles. In accordance with UBC Standards No.
15-3 and 15-4 and /or CSA0118.1.
Note: all product is kiln dried prior to pressure impregnation in ensure full absorption, and then kiln dried after as part of the chemical
process to permanently fix the treatment into the cells of the wood.
Recommended for: Applications in hot humid climate regions.
Class B Fire Retardant System
Whether required by local building codes or for your own peace of mind, all cedar shingle and shake products can
be treated with proven fire retardant chemicals that remain effective for the life of the roof. The treatment offered in
this section of the catalog refers to Class "B" requirements for Flame and Burning tests and meet all National
Building Code Test Standards.
Please note that cedar products are available with either CCA (pressure impregnated preservative treatment or pressure impregnated
fire-retardant treatment but not both).
These treatments may not meet the building code requirements for your area. California residents should contact us for additional
information on local regulations. Please contact if you have any questions.
Class C Fire Retardant System
Whether required by local building codes or for your own peace of mind, all cedar shingle and shake products can be treated with proven fire retardant chemicals that remain effective for the life of the roof. The treatment offered in
this section of the catalog refers to Class "C" requirements for Flame and Burning tests and meet all National
Building Code Test Standards.
Please note that cedar products are available with either CCA (pressure impregnated preservative treatment or pressure impregnated
fire-retardant treatment but not both.
These treatments may not meet the building code requirements for your area. California residents should contact us for additional
information on local regulations. Please contact if you have any questions.
Class B California (ICBO)
Class B California (ICBO) Flame retardant treatments required by California building Codes. Please check your local area codes to determine the appropriate classification for your application.
Class C California (ICBO)
Flame retardant treatments required by California building Codes. Please check your local area codes to determine
the appropriate classification for your application.
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