Although machined perfectly straight and uniform at point of manufacture, it is inevitable that wall logs left to their own devices will alter shape due to changing moisture content and temperature.
The result of these deviations from a perfectly straight log means that during construction, the tongue and groove boards don't always marry up as accurately as they should - don't fret (!) This really isn't a problem. As the walls increase in height and therefore weight, they will settle into their final resting place.
To encourage this correct placement, I use two methods to settle the boards into place, in both cases using a soft faced mallet :
Note - it is worth selecting a white faced mallet so that it does not leave black "scuff" marks on the timber.
Take a look at our timber cabins here
Take a look at our timber garage units here