Verified products

Thermowood® decking, cladding, siding  

Species

Pine (Pinus sylvestris), spruce (Picea abies)

Origin of harvest

Finland; 95% PEFC certified


Thank you for your interest in SLP Thermowood® spruce and pine products.

SLP is the first company in the world to use Nature’s Barcode™ to independently verify the quality, species and origin of their Thermowood® spruce and pine products. 


Benefits of verification

Finnish spruce and pine have excellent qualities.

Finnish spruce and pine are renowned as some of the highest quality natural forest softwoods available. Most forest land is family-owned and Finland has very high standards of forest management practices adapted to the slow growing nature of the local softwoods.

These factors contribute to consistently higher quality timber than that of neighboring countries. Nature’s Barcode™ provides assurance that all timber used in verified SLP Thermowood® products is of Finnish origin. 

MOST OF THE TIMBER USED IN SLP THERMOWOOD® PRODUCTS IS PEFC CERTIFIED.

At least 95% of the timber used in SLP's Thermowood® products come from PEFC certified forest sources, and processed by PEFC Chain of Custody certified sawmills. For more information, see pefc.org.

SLP SUPPLIER MILLS ARE SPECIALLY SELECTED FOR THEIR ABILITY TO MEET SLP'S STRINGENT QUALITY STANDARDS.

Thermowood® products are only as good as the timber used in production. This is why SLP only sources sawn timber from the smaller, mostly family-owned Finnish saw mills that are capable of meeting stringent quality standards for every order.


Nature’s Barcode™ methodology

An independent party has conducted a comprehensive risk assessment on this product. This has included:

•  a supply chain analysis to assess the level of traceability back to the forest of harvest
•  identification of any risk of species or origin substitution along the supply chain.

Controls have then been implemented to ensure that only Finnish spruce and pine from the identified mills is used to manufacture Thermowood® products:

Document traceability checks 

Random checks are performed on manufacturer production records, log purchase, log transportation, and log delivery. This process demonstrates an unbroken link of product back to the forest concession for every shipment.

Wood anatomy (microscopic) analysis

Wood anatomy testing is done to ensure that the timber used in production is of the correct species and shows visual characteristics consistent with Finnish grown timber.

Density analysis 

This form of scientific testing helps to confirm that timber used in production is of the expected density for Finnish spruce and pine.

ISOTOPE testing

Using unique isotopic signatures, this form of testing is done to verify that the timber used in production originates from Finland.


Find out more

Visit the SLP website for enquiries and other products. 

Request further information about a verified shipment here. 


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