Insulation and Joinery


There are a number of variables that enter into the equation when determining true insulative properties of log homes. The one that everyone knows is the “R” Value. The “R” Value of wood is approximately 1 per inch, while the “R” Value of fiberglass insulation is 3.3 per inch. The other most important factor, however, is the thermal mass potential and heat conductivity of wood. It is for these reasons that log homes are cool in hot weather and warm in cool weather. It is the ability of wood to trap and store energy in its physical mass that so many people are unaware of. The delay from storing energy and releasing it is referred to as lag time and during lag time, the wood has an opportunity to store peak heat or cool loads and release them at opposite temperature periods. This maintains a constant, more comfortable temperature range, with less heating expense. Both important factor which everyone understands.


Roundwood’s log joinery is a blend of what we believe are the best ideas and most common sense. Our notches are a shrink to fit style saddle notch, where receivers are cut on the top half of every log over a notch. This forms an upside down wedge for the bottom of the next log to sit over, thus creating and maintaining a tight fitting notch with sufficient wood left to keep its strength and forming a steady downward slope for water to repel from. The lateral groove or joining of top to bottom log between notches is done in a Scandinavian full scribe method with as little wood relieved from any logs as possible. We use a varying degree of over scribe on our lateral groove thus creating weight loads where needed and maintaining a good fit for many years to come.


Log or timber accents are also becoming a popular product, especially for people who are renovating and want that extra accent on their home. These projects vary in size and style and can be designed into a new or existing building with ease. On a remodel job customers are restricted on how much they can add to their project because of practicality and how much they want to take down to facilitate a log accent. Things like interior trusses are hard to add to an existing structure. It is however surprising how easy it is to apply a non structural timber or log truss to an exterior dormer. Log corner posts, beams, window framings and roof support beams are usually quite easy to instal onto an existing building. If you’re building new, the possabilities are endless with what you can do with a log or timber accent package. Anything from log joits for loft, ridgepole and purlons, structural log trusses, stairs, rails, posts and beams are all quite simple to include in your new house plans.