Painting of glued laminated timber houses
Painting of glued laminated timber houses
We choose timber for our future wooden house for its environmental friendliness, the possibility of a relatively simple construction, as well as for attractive, aesthetic appearance of the facade. You know that timber is able to maintain its original performance for a long time, this is the main reason why many people nowadays choose this material for their country or townhouse. But it is not enough to select high-quality building materials and build a wood house from it. Remember that any surface needs treatment to prevent dampness, decay, and destruction. So any wooden house must be protected from outside.
So why painting glulam house from outside is a good idea? Why just not to build a house made of expensive high-quality wood, held a preliminary chemical treatment at the factory, and not to pay extra attention to the color? Of course, you can act this way. But this variant involves considerable financial costs, because the best-quality wood by no means has a low price. In addition, a good quality material is not so easy to find on today's market. In addition, any factory processing eventually has to be upgraded, so that you will definitely need the skills of painting. Therefore, it is advisable by some experts to buy the wood yourself, and treat it.
Why can the wooden houses of timber wrack over time?
Wood is a natural living material, which is the subject to the aging process. The impact of external negative factors, such as temperature, humidity, air flow, etc., contribute to the process of destruction of the wood over time, and without protection even a high-quality wooden house may wrack in a few years. The moisture that gets into the wood fibers causes its extension. After drying, vice versa – there is the restriction of timber. All this eventually leads to cracks, as well as to fungoid growth and the formation of mold.
Bark beetles are of particular danger to the wood. They can destroy the internal structure of your chosen building material in a relatively short time, thus causing a lot of trouble, forcing the owners of the house to carry out larger repair works.
It is necessary to take into account one very important nuance, the glued laminated house that is located in an open area and near water, is much more susceptible to the negative effects of atmospheric loads than the wooden houses that are located away from any sources of moisture and are protected by forests, mountains or by other houses. In addition, the north side of any wooden building is less influenced by negative weather effects than western and southern sides.
Obviously, there are quite a lot of factors responsible for an early aging of the wood. But painting walls and other exterior parts of the wooden house will help to avoid this process.
Benefits of exterior painting of a glulam house:
- The paint protects wood from destruction.
- The paint prevents dampness and wood rotting.
Additional treatment with antiseptic protects against mold, corrosion, as well as bark beetles, which can permanently destroy your house.
Painting a wooden house allows you to create an attractive facade that will fit your chosen style. The outer coating allows you to change the facade style of the house, if necessary.
How should a new glulam house be pained outside?
So, you have designed your own wooden house, and then built a new wooden house. Now you want to proceed to its coloring. But then arises a question "how should it be painted?" For a start, it is important to understand a wooden house painting procedure and action sequence.
Step 1: First of all you need to prepare the surface.
Wood, in contrast to concrete or brick, requires special care, so it is highly undesirable to apply paint to the surface immediately, without pretreatment. So, first you need to remove dust and various impurities from the surface. This can be done using a garden sprayer and not very stiff brush, or by high-pressure washing. If wood has visible signs of mold or blueing, you need to treat it with a chemical agent. Today you can find a wide range of these materials on the market. The resin which can be formed on wooden surface (especially, of softwood) can be purified using a metal spatula, after that the treated area must be covered by a special varnish for knots. If a wood surface has any metal parts, you need a primer on metal, using which you will need to cover all the nail-heads, screws and other products, when it comes to wood painting with pigment finish.
After completing the process of a wooden surface preparation, you need to allow wood to "rest" for 10-15 days, do not forget to provide very good ventilation.
Step 2. Select the paint.
If you want to paint walls and outer parts of the glulam house to be as effective as possible and stay reliable and durable for a long time, it is necessary to choose the right paint. In most cases, there are four basic types of coatings:
- Antiseptics coverts on alkyd-acrylate
Antiseptic has considerable penetrating effect of up to 4 mm. This ensures reliable protection of a wooden surface from all kinds of atmospheric loads, rot and mold. There are two kinds of antiseptics: covering and glazing. Glazing antiseptic gives more noble and natural shade to the timber, as well as allows to maintain for a long time its natural structure.
Oil paint for walls is well absorbed on wood and has a high resistance to atmospheric corrosion. But it has one drawback - a long drying time, usually about a day. In addition, after a certain period of time, the surface treated with an oil paint can change its color and lose its shine.
Acrylic paint, as well as antiseptic paint has a high level of weather resistance and, moreover, retains its excellent color and gloss for a long time. This coating does not clog the pores on a wooden structure and thus allows the timber to breathe and to carry out the air exchange environment.
Acrylate, which is a part of such paints, makes wood more elastic and resistant to various mechanical strains.
Opaque antiseptic on alkyd-acrylate is a fairly new and most durable paint material on the construction market. Using this material you can even restore faded wood, leaving its structure, respectively, you can also choose a cheaper material for your wooden house construction, and then cover it according to modern requirements of aesthetic appearance and reliable surface protection.
It should be noted that painting the walls is carried out once in every few years, as even the most expensive and high-quality coating will sooner or later lose its protective properties and require updating. Average life of the main types of paint are the following:
about 5 years - for glazing antiseptics;
up to 6 years - for oil-based paints;
about 7 years - for coating antiseptics;
up to 8 years - for acrylic paints;
more than 10 years for antiseptics coverts on alkyd-acrylate.
Step 3. Start the coloring of the outer surface of a wooden house
We should note that you will be able to paint a wooden surface of a new house even without any expertise, so do not necessarily seek the help of professionals - you can do it on your own. You just need to follow some guidelines.
It is necessary to apply properly primer antiseptic, which is very important for protection of wood from mold, fungus and blueing. The fact is that if you omit this point and will start painting the wall directly, then in a couple of years you will notice a significant deterioration in the condition of the wood. So in any case do not save money on the primer antiseptics because they provide an opportunity to extend the life of wooden products significantly.
In the process of staining you should not forget that the paint is applied only on a dry surface in 2-3 layers. Before applying the next layer, the previous should be completely dry. Recoating for alkyd formulation is 24 hours, for water-borne 2 to 12 hours at a temperature of + 23 ° C.
Please remember that the surface must be dry. During processing and drying temperature must be not below + 5 ° C and relative humidity must be no more than 80%.
Points to note about the primer. And why the surface must be primed?
Firstly, in this case the paint for wood is better mated with the surface. Secondly, the primer reduces paint consumption: it will not be absorbed into the wood. Finally, it is used in order to prevent stain stood out from the tannins.
How should the prime be chosen?
For outside finish works you’d better to use antiseptic primer. It protects wood from weather, rot and insects. For inside finishing work you can take a usual one. To do this, take the varnish or colorless primer for wood. Linseed oil is diluted with a solvent in equal proportions.
How the primer coat should be applied?
Stir primer before applying. If you plan to prime with a linseed oil, first layer should be applied after dilution with a solvent in a ratio of 1: 1. Wooden surfaces are primed with a brush, after this process start coloring only a day later.
The main principle for paint choosing for outdoor works is that paints should have high elasticity – the cover will not crack when the humidity drops. For the street you can take the oil, alkyd and alkyd-oil paints.
Although the leading manufacturers nowadays produce more environmentally-friendly water-dispersible paint for wood intended for outdoor use. This kind of paint is characterized by being durble, eco-friendly, and the wood surface after been painted with it "breathes".
When applying the glazing coating or antiseptic, it should be stirred from time to time, for a better distribution of the pigment. For uniform coating on the working surface it is necessary to use a special brush, that will match in size. To provide bright and saturated colors it is recommended to use priming antiseptic of the same color, which will provide better shading.
Also it is not recommended to paint wooden products in direct sunlight, because it can cause very unpleasant consequences - the paint will dry quickly, and this can lead to uneven staining. Antiseptic as well as paint are usually applied in the lengthwise direction.
Since moisture quickly absorb in the butt end of logs and planks, these areas should be pre-treated with several layers of primer coating and coating material - this will avoid the early fracture and rotting of wood fibers due to the high concentration of water therein.
How should old wooden houses be painted?
If you have decided that the old coating is already unfit and unable to provide protection against deterioration of wood, you should think about the repainting of the walls and the exterior parts of the house.
Before that, you need carefully examine the surface - it is possible that you find a defect, and you will need to carry out immediate repair, before you start coloring. Depending on the condition of cover you can either confine to painting of the most worn areas, or completely repaint the house.
The main nuance that should be taken into account in this is that you need to use the same type of coverage that was used during the previous coloring at home, and it is desirable to use the paint of the same manufacturer. If you do not know or do not remember what type of painting was used before, you can try to independently determine the type of coverage.
You can distinguish the types of paint according to the following criteria:
- acrylate coating in its appearance and touch resemble thin skin; they tend to crack along the direction of the fibers;
- oil paint products will eventually become dull, and may leave a faint chalky residue on the skin when touched. It cracks in cells, or across the fibers;
- antiseptic glazing paint for the walls after a certain period of time becomes more subtle. In case if the surface is glazed, the house can be painted by an oil paint or by antiseptic of the same tone. If the presence of antiseptic not visible, it is possible to use any acrylate paint;
- though first coverts antiseptics were produced about 20 years ago, so far they do not need to be updated;
Now we would like to give a summary of everything you need to know about outdoor old wooden house painting in stages of work:
Stage 1: Choose the paint for glulam houses
Before starting painting work, it is necessary to choose the appropriate type of paint, that will suit many criterion: wood home project, the area of wood home construction, including weather parameters, you own preferences, home builders recommendation and etc. So, if the house was painted with oil paint, you need to update it by the same color.
In a pinch, you can use the acrylate coating, but first you need to clean work surface with a wire brush. If during the previous painting work acrylic paint was used, then, the surface of the house needs to be updated by the same material or, in the absence of such, any other oil-based paint (do not forget about the pre-treatment of old pavement surface).
Stage 2: Clear the old paint from the surface
First of all, you need to thoroughly clean the wood surface from dust, dirt and remnants of the old coating with a scraper or a brush. This is followed by water sprayed from a spray or high pressure washing - this is necessary in order to remove fine dust particles remaining after brushing. If you find mold on the surface of the wood, it must be immediately eliminated by treating it with a special solution. To ensure the best keying action between the surface and paint, it may be treated with an alkaline detergent of high quality.
If before staining you find old, uneven or affected by rot boards, be sure to replace them with new ones.
If during the skinning of the old paint it is hardly removed, you don’t need to spend your time on it - it can be left. If it is needed, grinding can be carried out on the working surface.
Stage 3: The process of wood painting
After completing these preparatory steps, you can start coloring. This should be done on the same algorithm as for the wooden surface of a new glulam house.
How to paint correctly. Main tips
The paint is applied with a flat brush.
For large surfaces or openwork elements it is more convenient to use a spray gun;
Do not take much paint: do not omit more than a third of the brush into the jar
Wood is painted along the fibers, smoothly, without pressing strongly on a brush.
If you follow the above mentioned recommendations, your wood home will be attractive and cozy for many years.
If you are interested in painting of glued laminated timber houses, you may:
Other products on Glulam
Glued Laminated Timber (Gluelam), Cross-Laminated Timber (CLT), Laminated Veneer Lumber (LVL), Laminated Strand Lumber (LSL), and Parallel Strand Lumber (PSL)
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