Timber Set
Application Guide
‘Energy Sealing a Machine Log Home’

Using Timber Set as an energy sealant is applicable to new machine log homes only, where the logs have been air or kiln dried. 

Machine logs are produced to look identical to one another.  Since each log will lay exactly the same way as the one below it, Timber Set can be added to the full length of each log and around each of the corner saddle areas during the stacking/assembly of the home.  Applying Timber Set in this fashion creates an air seal similar to a vapor barrier that you would find in a framed home.  

There are generally two types of machine log homes: Round and ‘D.’  While they look different, the application of Timber Set is the same for both.

Photo courtesy of Franklin Industries

Procedure:

Make sure there is no dirt or dust on the surface of the log where Timber Set will be applied.  Wipe the area clean with a brush, not a cloth.  If a regular caulking gun is used (for either the 10.5 oz or 29 oz tube), cut the tip so it will dispense approximately a 3/8” bead.  If a bulk gun is used, use a 3/8” tip.

For Round Logs (Non Interlocking):

Run a 3/8” bead line to both the inside and outside on the underside of the next log in the cut out area, about 1” in from each edge for the full length of the log, as well as around the saddle area. 

For Interlocking Logs (Tongue & Groove):

Run a 3/8” bead to the outside of the tongue(s) or groove(s), including in the saddle areas, leaving no gaps.  Stack the next log on top and repeat until done.  Any Timber Set that squeezes out of the horizontal areas on either the interior or exterior side should be wiped away.  If some residue is left, however, it will disappear when the wood finish is applied.