Slowly grown arctic pine from the unspoilt forests

Logs are traditional construction materials made of solid wood.

The logs selected for construction purposes are straight and throughout of good quality. Regardless of the log type, grooves and corner joints are cut into the logs to allow them to be mounted on top of each other and to connect the walls at the corners.

Our three different log types with the large selection of different sizes give our customers a wide choice.

All our logs are slow-growing densely fibrous pine, rich in heartwood, harvested from the unspoilt forests of Kainuu in north-eastern Finland.

Prior to manufacturing, the logs are dried in a dry kiln to minimize the natural expansion and shrinkage of wood later on.

Once dried, wood no longer, wood no longer offers favourable conditions for any pests found in Finland.


Round logs (Ø 210, 230, 250, 270 and 290 mm)

+ Round logs are traditional.
+ Round logs blend in harmoniously with natural landscapes and are therefore ideal for holiday homes.
+ Round logs are available in a wide range of sizes, which enables relatively thick solid wall structures.
+ Round logs are relatively inexpensive considering their size.

– Round logs are susceptible to cracking, which can sometimes be severe.
– Compared to square logs, round logs take up more space during transportation.
– Assembly requires special expertise, and solid round logs are heavy to move around on site.
– When designing the roof structure, the best option is to make the eaves as long as possible to protect the walls from the effects of the weather but also to choose a heavy roofing material (usually tiles) to facilitate the natural process of settling.

Solid heart split square logs


Solid heart split square logs (70×170 mm and 95×170 mm)

+ The logs are cut through the centre of the heartwood, which minimises cracking on the logs’ surface.
+ Square logs are especially well suited for builds where an additional layer of insulation is used on the external walls or where an especially energy-efficient double log structure is used.
+ Square logs fit in well with urban environment ( normal log crossings in the corners can be substituted with dovetail corners).
+ The double tongue-and-groove structure makes the logs fit tightly together.
+ Compared to round logs, square logs take up less space during transportation and are easier to assemble.
+ Square logs are more affordable than laminated logs although almost equal in terms of surface cracking

– The range of different sizes is limited due to the restricted maximum size of the logs.
– Changes in moisture levels during the time between manufacture and assembly may cause the logs to bend longitudinally.

Glue-laminated square logs (two or more planed layers of wood glued together)


(88×190 mm, 112×190 mm, 134×270 mm, 202×270 mm, 240×270 mm)

+ Cracking on the surface is minimal.
+ The logs do not bend even longitudinally.
+ Similarly to solid square logs, laminated logs fit in well with urban settings.
+ Laminated logs are available in more sizes than heart split square logs , which allows for conformance with local thermal insulation requirements without the need for additional insulation.
+ The finished wall structure is compact and less susceptible to settling.
+ Similarly to solid square logs, laminated logs are easy to assemble and transport.

– Similarly to solid round logs, larger sizes of laminated logs are heavy to move around on site.
– Due to the complicated manufacturing process, laminated logs are more expensive than solid square logs and round logs.

ProLog® CLT-log

Painumaton hirsi, 200x220 mm

Cross laminated non-settling log (135×214 mm, 204×214 mm, 270×214 mm).


+ a new non-settling log construction, that enables modern architecture and facilitates construction planning

+ easy to combine with other materials, such as glass, brick, stone

+ faster and easier to build because of no problems of settling

+ easy living – all the maintenance because of settling disappears


-+ material is a little more expensive than traditional glue laminated log, but all in all very cost effective way to build