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Use
of a special gap on an axis of logs (undercut)
Certainly a just cut
down log house on a building site looks beautifully if logs lay
"one-to-one", without cracks and gaps. Especially if to
look from end faces of logs in corners of notches, in window and
door apertures.
But the problem is
that in this case in 2-3 years it will be big enough cracks between
logs which not only will spoil appearance of your wooden house
or a bath, but, the most important thing, will negatively affect
heat conductivity of timbered walls. It will demand constant calking
and uses of hermetic, and, in the most negative cases, even special
warming of walls.
Why does it happen?
Let's consider this in details. It not an idle question: unfortunately,
in many building companies masters do not know about it and,
especially, cannot explain to you as to customers of the house or
a bath.
To prevention of formation
of cracks after shrinkage of a log home shell, technique of creation
of "undercut", i.e. a gap on an axis of logs is applied
in the company "Log Russia". This gap gets out
in the bottom part of a log on all its length, and from end faces
it is hardly less (5-8 mm together with height of curtaining
of external corners), and, in invisible parts of a log, hardly more
(10-15 mm), see fig. 1.
Let's notice, that features
of creation of an undercut for an
oval-flatten (a semioval log) are considered in separate section.
In drawing 1 the forces
operating on a log during shrinkage are shown. Owing to influence
of these forces, first of all, there is a crack in the bottom part
of a log. With time it increases (fig. 2).
If this gap was not primary
between the top and bottom log than edges of a groove of the top
log would reveal as wings, having formed considerable longitudinal
cracks along lines of contact of logs.
In our case "wings"
also reveal, but at the expense of gap there is "a soft planting"
of a top log on bottom, and groove edges even after expansion densely
enough adjoin a surface of the bottom log (fig. 2).
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Fig.
1
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Fig.
2
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As it looks in
practice is shown in following photos (fig. 3... 5).
And let you not
be frightened by crescent gaps between logs (fig. 3), especially
in window and door apertures (fig. 4 and 5), now you know,
that it is a special step of masters of the company "Log
Russia" which will protect walls of your house from negative
consequences.
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Fig.
3
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Fig.
4
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Fig.
5
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The
resulted information is the intellectual property of " Log
Russia".
At a reprint of materials, the reference to a company site is obligatory.
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