OSB-plate: solving the major problems of this material

OSB plate in our country there were only a dozen years ago, but in the world they have been known for more than three decades, from the time that was invented frame technology of building houses. To trim frame needed an entirely new material: durable and lightweight at the same time, reliable and easy to install - either natural wood or chipboard under these do not work. Thus it was invented OSB, or OSB (oriented strand board). It consists of layers of wood shavings. The main binder is a phenolic resin in combination with paraffin, in Europe for the plates used in the manufacture of furniture, used melamine binders. The outer layers of chips stacked along the boards and in the interior - across. Mutually perpendicular arrangement of the chip makes it more resistant to external influences. We can say that at a minimum thickness and low weight OSB reaches its maximum strength properties, and it is this material stiffens the whole structure of the frame of the pie. At the same time just OSB may be the most vulnerable link in the whole structure - the participants of our portal have seen this on their own experience. We will analyze the most common OSB problems and try to solve them with the help of experts.

European and American standards for OSB

There are two classifications of OSB boards. According to European standard EN 300, they are divided into four classes.

• OSB1 - plates, which are used in dry conditions; of them make furniture, paneling. This non-structural material.
• OSB2 - used indoors in dry conditions as a structural panel.
• OSB3 - used as structural panels in a wet environment, including the outside facilities. Thanks to the optimum ratio of cost, moisture resistance and durability, this material is the most in demand by builders frame houses on Forumhouse, including cladding facades.
• OSB4 - is already building block for load-bearing structures with high mechanical loads and high humidity.

OSB, made in the USA and Canada, divided into three classes. Criterion - water resistance level of bonding the chip agents:

• Interior - for interior construction work in dry conditions.
• Exposure 1 - structural panels that can withstand non-durable stay in wet conditions, so they It can be used for interior decoration wet rooms and for outdoor work (assuming other finishes pictures).
• Exterior -vyderzhivayut alternating cycles of wetting and drying, contact with the ground, prolonged exposure to adverse weather conditions.

European standards correspond approximately to the following US:

• OSB2 - Interior;
• OSB3 - Exposure 1;
• OSB4 - Exterior.

OSB in the frame structure

Due to the popularity of OSB-plate frame houses - one of the most talked materials FORUMHOUSE. Debate continues about how to look "right pie" as it is to reduce the cost without sacrificing structural strength, what is the role of OSB in the frame structure can be used for finishing OSB facade.

In the scheme proposed for discussion participant FORUMHOUSE BulKonstAre shown two variants of the carcass cake: Figure A - classic cake, the figure B - budget execution classical variant (savings of 1.5 times).

The idea to reduce the cost pie, withdrawing from it an element such as a frame plating on the outside OSB plates, not met with understanding on Forumhouse, because "in the construction of the avaricious pays thrice." Namely OSB gives reliability throughout the structure.

Svidig (Member FORUMHOUSE):

Without GSP house may arise.

OSB-boards with the best side showed itself during the earthquake in Japan: frame houses survived, although the neighborhood collapsed wood and stone.

Artem Soloviev (Project Manager Soppka OSB Protektor):

The main purpose of OSB - a stiffening structure.

OSB It gives the house an opportunity to stand for several decades. But it is when pie is mounted correctly. Technology frame housing, taking into account local conditions in Russia only created it a little more than ten years. Therefore, accurate, scientifically verified technology frame housing in Russia yet. In essence, yet each of the construction company is more or less their own technology - so there is always a possibility that the ventilation is done wrong, and unprotected OSB-plates will be in an environment with high humidity and infected by mold or fungus which will spread further, to the heater and frame.

How to protect OSB

Member FORUMHOUSE with the nickname Fast and Furious I found that the street side of his house, "went strongly" when he lived in it 4.5 years. It turned out that there has been complete destruction of the CAP.

Fast and Furious (Member FORUMHOUSE):

Had read in SIP-builders, as they, SIP panels, wonderful. And the fire did not burn and do not sink in water, and the weight puds on one self-tapping screws hanging. Only the fungus so it calmly eats and makes fun of me.

What fungus "quietly eats" panel - natural phenomenon, experts say. OSB is 90% of the wood, and it has the same weaknesses.

Artem Soloviev:

People are mistaken about the fact that OSB impregnated with resins, which prevent rotting. These resins only need to glue the wood chips. Formaldehyde resins do not possess antiseptic properties.

Guard should have already changed the color of the material. Our experts say that the OSB-boards Gray says that These boards are already infected with mold.

Quite a long time it was thought that biosecurity need to cover only the frame and OSB-boards and other design elements do not need it. This is wrong - OSB-plates are not covered biosecurity simply because until recently there was no structure that would have a good adhesion to the OSB boards.

Artem Soloviev:

The frame house, everything is interconnected. The frame keeps the house and makes OSB frame stronger. Even kontrobreshetku to which OSB panels are attached, must be treated Bioprotective composition. To protect the structure of each element has its own products

OSB for facades

For the above reasons, it is not suitable for use as an OSB finishing processing without specialized compositions or paints bioshield.

Birdofprey (Member FORUMHOUSE):

If you want to throw out the money - then we can apply the CAP, as the finish line, and full.

For facade decoration of the house of OSB can be used ceramic tiles, ceramic tile that mimics a brick, siding or imitation logs. Well plates can be plastered.

If the choice of finishes for OSB panels fell on the plaster, then here, too, there can be problems with the choice of additional material. Such work can not be carried out directly on the OSB, boards must be protected.

Nadegniy (Member FORUMHOUSE):

According to CAP plaster for some time will be held, cracks along the seams CAP will be in the first winter, gradually swell the edges OSB them darken finishing.

Here are the options "plaster cake", has been used successfully on FORUMHOUSE.

If the pads have been made:

• GSP + primer + plaster + elastic lining.
• GSP + concrete-contact + + elastic plaster lining.
• GSP + primer + rei. Mesh + + plaster lining.

If the pads are not used:

• Wet facade: SIR + PPP (expanded polystyrene; DPM-C 25F) reinforcing layer + base + decorative plaster.
• Mesh reinforced SIR + + + filler + primer elastic plaster.
• OSB + 2 + glassine layer mesh + plaster.

OSB panels can simply be painted. That paint - a simple varnish is not suitable, the varnish does not protect from UV light, it is necessary to give the color of wood. Now, by the way, there were colors that are at times cheaper than European.

Artem Soloviev:

Sun eventually burn out resin from the surface of OSB boards, wood chips depart, will crack, which will get in moisture. Naturally, the change of seasons and the constant freezing and razmerzaniya chips would go even further.

These slits are formed microorganisms. Gray OSB panels suggests that the slab is already infected.

Do putty plate before painting? Perhaps, virgin filler structure GSP looks better smooth sheet and more reminiscent of the original half-timbered.

Members of our portal with extensive experience working with CAP, it is recommended to approach the selection boards for facades responsibly. No matter what class you choose OSB, try to keep them in top layer of bark is not contained. If the bark on the sheet still there, it gently separated with a sharp instrument and tear.

Urgenz Member FORUMHOUSE):

If this is not removed, after the winter crust bulges. I tore off the bark and colored paint residues. When buying paint - take with small margin (for such cases) and be sure to save room tinting.

When painting the joints between the slabs OSB-closed wooden plates - it can be a board, wall paneling, block-house; plastic or aluminum trim. Important: The lining is better not to fix screws and liquid nails or glue.

On FORUMHOUSE you can read the article on how to be the right cake framing walls, learn about the advantages and weaknesses different types of fronts over the OSB, watch a video about how to build a brick house of unusual architecture.

Discuss the article and read other materials devoted to country life you can on the websiteFORUMHOUSE.

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