Building a house for 3 weeks: membrane, vapor barrier, insulation

High-grade steam, and effective insulation - "alpha" and "omega" frame construction

After the completion of the construction of the frame and roof system should be possible to quickly perform roofing work. Firstly, it will allow the platform to protect from atmospheric precipitation, and secondly, all further work is much more comfortable to perform under the roof.

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However, good weather conditions, coupled with a slight anticipated workload, and the house we have a really small, They allowed us to depart from tradition and to first perform heat insulation of the roof, and after that, to perform the installation of roofing coverage. Such a method is physically easier, because it allows to stack the insulation between the rafters above.

A bit of a heater

As a heater in our frame house used mineral wool, the density of 30-35 kg / m³. This stacked insulation layers, with a binding layer overlap splice plates following the previous layer. The logic here is simple: thus retracted through a possible blowing of insulation between the sheets and overlap so called cold bridges. The more layers of insulation, the higher the energy efficiency of the house.

The thickness of the insulation is selected based on the purpose of the house. Given that we have a home for a seasonal residence, then it is most important not to provide protection from the cold in winter, and prevent it from heat from the sun in summer. In this regard, the thickness of the insulation of walls, we selected 100 mm, a little more in the roof - 150 mm, which is logical, since the roof is heated, and more. Objectively speaking, this thickness of insulation is enough for home use in the off-season and even in winter on weekends. A small house will quickly warm up and to maintain a comfortable temperature enough pair of electrical convectors.

Vapor barrier

The basic meaning of the vapor barrier - preventing the ingress of water vapor into the interior of the wall. Until now, many samostroyschiki pay insufficient attention to when performing this operation, mistakenly believing that their house - it's not a boiler and steam bath, and hit the water vapor in the insulation - the usual horror stories.
In fact, everything is much more serious and insulation in the walls in need of full protection, so the vapor barrier in the building must be carried out with a continuous loop gluing the seams between the paintings. The main principle of the location of the materials in the wall frame house - water vapor permeability of the materials should be increased from the inside out. T. e. a first layer - steam - is the maximum delay of steam, if some amount of steam permeated and inside walls, then it should not be obstacles to the exit at ventzazor.

As a vapor barrier, we used a universal type D Hydro, called colloquially "sacking". It is attached to the frame posts using stapler Its distinguishing feature is the built-in tape for bonding, ie. E. the installation does not need a double sided tape.

An important point: after mounting brackets all necessary glue tape to completely seal.

We were lucky with the weather, so first we carried out a vapor barrier on the rafters. Then we made from dry interior lathing boards 20 × 100 mm. This board, firstly, the roof insulation support, and secondly a ground for mounting finishing interior finish.
As for the wall, the top of the inner lining of the CAP, we also assembled a vapor barrier. SIR though has a serious steam insulating effect, but can not fully meet the necessary parameters.

Warming

After that, the roof was ready to warming. Warming we made above, the mats of insulation thickness of 50 mm in three layers, with overlapping seams. Again - the small size of the house and the simplicity of the roof structure allowed to do the job in less than a day.
Warming of the frame carried out, since the inside walls were covered with sheets of OSB. In the space between the stud frame insulation is placed vraspor. An ideal variant is considered, when the width of the mat insulation on 1 centimeter greater than the distance between the uprights, in this case the heater without rises JAM edges, and its middle bulges not.

In places where the project stud spacing was smaller, we have made a special knife trimming mats.

In our case, when the insulation of the roof from the top and frame insulation from the outside, all the work must be carried out only in good weather, because wet insulation is significantly loses its properties.

Membrane

After installation of insulation we performed vetrovlagozaschitu walls and the roof with the help of the membrane. The membrane protects the insulation from blowing and from ingress of moisture insulation. This material is vapor-permeable and contributes to the removal of vapor through the wall thickness. The installation of the membrane is no big deal, yet still there are craftsmen who fastened it backwards. As a rule, all membranes are mounted so that they are wound in a roll. That is, do not need to invent anything, just take a roll of lining the edge of the wall and rolled.

The minimum overlap required for a leaf membrane - it is 15 centimeters. The topsheet should cover the bottom, ie. E. Installation must be carried upwards. As a vapor barrier, the membrane is attached to the posts by means of staples.
One of the most common mistakes when working frame construction - improper use of the membrane and the vapor barrier. Such mistakes violate the principle of frame housing and generate incorrect myths and facts about it.

In the next and final part we will tell you about the installation of the roof, exterior finishing and installation of windows.

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