The exterior wall can be painted from an inexperienced painter when it is systematic and follows the instructions given to the paint type.
There are 3-5 main stages in painting the exterior wall:
- Identifying the previous paint type and the choice of paint suitable for the surface
- Groundwork that includes removal of an old paint, at least to the extent that it is loose or poorly attached, as well as the surface of the surface
- Mold protection
- Priming or a primer painting
- Topcoat
In the case of a previously unpainted surface, the first two steps will be left out, and after the mold protection, the surface can be primed.
Identification of the previous paint type and the choice of suitable paint type
Not only is the color tone, above all, the paint type, which is suitable for the surface to be painted and therefore lasting as long as possible and well protective. In the case of maintenance painting, first you have to find out what type of paint the building has previously been painted to ensure the suitability of a new paint on the old paint.
The cooking or red paint paint becomes floury as it ages, and as the surface swipe, the fingers can leave a floury pigment. If the paint leaves floury off the surface with a rigid brush, it is probably red -skinned. The best paint on the genuine red paint is a genuine cooked red soil, but if you want to change the paint type, the old red soil must be very carefully removed before painting to ensure adhesion.
Oil paints such as linen and petroleum oil paint are also recognized by the floury chalk surface. However, the entire coat of paint does not go off by brushing, but under a thin floury layer, the old paint is cracked into small pieces of square that click when they twist in their fingers. The best choice for oil paint is oil paint.
Plastic -binding paints, in turn, come off as they age as strips that are bent and do not click when they are bent. On top of alkyd and various plastic bindings, linen or petroleum oil paint can be used after careful groundwork.
Previously, for non -painted sawdays, all the exterior paints are suitable for a coarse and porous sawn surface as a paint as an easy paint to grab and absorb. New planed and planing log surfaces can be challenging for different types of paint due to their smoothness, tightness and extracts it contains. You can find your own instructions for new planed surfaces here.
The groundwork of the exterior wall before painting
Many people think that the exterior wall painting is like playing children when the groundwork can be done. However, careful groundwork is worth the effort, as they can significantly extend the age of the paint.
When removing oil or latex paints, it is important to remove any loose or poorly attached paint from the surface. If the paint layers have been thickly accumulated or the paint surface must be almost completely removed for other reasons, it is worth considering whether, for example, glass crushing blast is suitable for removing the paint. Often, however, a manual scraper, or paint formula, is sufficient. It can effectively remove the paint and without damaging the wood surface. Often it is also the best tool for removing resin castings. A sturdy long -tailed street brush or root brush is enough to remove the cooking paint. Be sure to protect your eyes and airways when removing the paint.
If the paint surface has rushed in some places so that the exposed wood surface has been grayed and fluffy, or the surface has been untreated, the areas must be grayed on a solid wood surface. The fluffy surface is not a solid enough base for the paint adhesion, but the stick lint off easily from the wood surface and then removes the paint with it.
After paint removal and sanding, the surface is cleaned of dust and other dirt. The surface can be lightly dry brushing, after which it is washed with either paint detergent or mold detergent . After washing the instructions, the surface is rinsed and allowed to dry.
Exterior wall mold protection
The biocidal mold protection agent destroys mold and algae spores attached to the surface to be painted and acts as a preventive primer, slowing down the formation of potential mold growth. Uula Home protection is a binder -free liquid that is applied and allowed to dry on the surface before starting the painting. The most easily distributed with garden or backpacking. The solution dries quickly and the surface can be painted 24 hours after the mold protection treatment. Mold protection is recommended for use as a primer for all exterior paints.
Exterior wall priming or ground painting
The cooking paint and the Roslag mahogany do not require primer, but when using linen and petroleum oil, the surface is primed. Previously, unpainted sawdays surfaces are primed with Uula underground paint , separate painting instructions for planing log surfaces can be found here .
In maintenance painting, the locations that have remained wood clean after the paint removal. When using Uula Linen and Petrolery Oil, we recommend 15-20% thinned linen or petroleum oil for primer. For thinning of both paints, the Uula Oil Paint thinner , which contains Vernissa.
Exterior wall topcoat
Before starting the painting and occasionally during painting, the paint is thoroughly mixed with a paintbrush , as the pigments can quickly sink into the bottom of the jar, causing small differences. For a uniform wall surface, it is advisable to get and mix a sufficient paint batch in one container to avoid any subtle tinting shades.
The surface to be painted must be clean and dry before starting the painting. It is best to paint the exterior wall in dry cloudy weather. Linseed oil -based paints require heat and light to dry, and therefore the temperature should be at least +10 degrees Celsius and relative air humidity less than 80%. Do not paint in the rain or direct sunlight. The heat caused by the sun may raise bubbles on the paint surface.
The painting of the exterior wall follows the direction of the exterior cladding so that a few ferries at a time try to paint and smooth out completely from the end of the board. This makes the paint surface smooth and beautiful, leaving no seams or other shiny spots than the other surface. When using a high pressure spray, the paint is leveled after injection with a sturdy brush to allow the paint to spread evenly and adhere well and absorb well.
Linseed oil paint is twice thinned out with a tight tree to the cause of a tight tree, while the petroleum oil paint is painted with a rich paint. The cooking paint also painted as a one -time painting. The surface of the linseed oil paint is allowed to dry 4 days before the second layer of paint, while the roslag mahogany can be treated as soon as the surface is sufficiently porous to take two treatments.
Product -specific handling instructions, which are always worth checking out before painting, can be found on our online store on uula.fi on each product's own page. You can also call us on 010 8200 020 or send us an email to uula@uula.fi .
