Facade decorating very often includes such a stage as painting windows. For wooden frames, this is the best way to extend the service life and improve the appearance, while plastic frames are usually painted in order to change the exterior design of the house or eliminate minor defects. As in any other business, there are rules and secrets here, the study of which will help to avoid annoying mistakes when painting window frames on your own.
Painting window frames
The range of paints and varnishes is huge , and in order to choose the most suitable tool, you need to clearly understand what characteristics it should have. In this case, the material of the frame, the presence of the previous coating, the operating conditions, and also the method of paint application should be taken into account.
The assortment of paintwork materials is very large
Basic requirements for paintwork materials for outdoor work:
Oil, alkyd, acrylic, nitrocellulose and polyurethane paints meet these requirements to varying degrees. For PVC windows, acrylic compounds and water-dispersion varnishes are mainly used. Let's consider the main characteristics of these paints.
|LMB type||Main characteristics||Disadvantages|
| Such compositions are excellent for wooden frames and slopes, metal parts. |
They have a high hiding power, reliably protect wood from moisture, microorganisms and insects. Easy to apply, after drying, they form a shiny glossy coating, which has dirt-repellent properties
|Dry for a long time, have a strong odor, are fire hazardous, prone to fading, the service life of the coating is 2-3 years|
|Alkyd-based enamels are distinguished by moisture and frost resistance, UV resistance. They protect the wood from rotting and damage by insects, give the painted surface a high decorative effect, are resistant to abrasion||The presence of a pungent odor, flammability|
|These paints are excellent for wooden frames, dry quickly and have good covering ability. They are the most environmentally friendly, practically odorless, resistant to fading, moisture, temperature extremes. After drying, they form a thin elastic film that is resistant to abrasion and dirt||High cost|
| Fast drying, chemical and weather resistant inks producing a glossy finish with a deep rich color. |
They have a high hiding power, well mask the structure of the base.The surface is easy to clean, does not fade for a long time, is not affected by fungi and insects
|Toxicity, high cost|
|Nitro enamels are easy to apply, dry very quickly, and form a durable coating resistant to moisture and mechanical stress. Excellent for application with a spray gun, which significantly reduces paint consumption||Toxicity, poor resistance to weathering, flammability| Construction paints
Varnishes can be used instead of paint and as a finishing layer after painting surface. Their main difference is that they do not hide the texture of the wood, but, on the contrary, make it more expressive, while providing a high degree of protection against any negative impact. Varnishing compositions are colorless and tinted.
For external treatment of wooden windows, alkyd and water-based varnishes are most often used.
Alkyd varnish adheres perfectly to any surfaces and forms a very hard durable coating that is resistant to abrasion, moisture, and chemical attack. Such a surface is not affected by fungi and insect pests, dirt also does not eat in due to the lack of pores, the windows have a very attractive appearance. But when choosing this varnish, keep in mind that the composition is quite toxic and fire hazardous.
Alkyd varnish PF-231
Waterborne varnishes are also capable of providing good protection for wood as they are water repellent.
After drying, they form a very thin, elastic and durable film that does not allow moisture and dirt to penetrate into the wood. Such compositions almost do not emit harmful substances and are not flammable, but they do not differ in resistance to abrasion. For greater efficiency, they must be used in combination with protective impregnations.
Modern wood impregnations are very diverse. Depending on the composition, they provide protection against insects, decay, fire, atmospheric influences and other negative factors.
There are compounds that simultaneously perform protective and decorative functions, so that the surface does not need to be additionally varnished or painted. The greatest demand is for wood impregnations Aquatex, Pinotex, Tikkurila.
Impregnation for wood Aquatex
Impregnation for wood Tikkurila Valtti Satin
The area of window frames and sashes is calculated differently from the area of walls or ceilings. To avoid numerous measurements, additions and multiplications, special tables with conversion factors were developed - GESN-2001-15, p. 2.
Measure the window to find out the paint consumption
Counting the paint consumption
For calculations, you need to measure the width and height of the window (along the outer edge of the box), multiply the values obtained to find out the area. In the table, find the required coefficient, depending on the type and number of bindings, and then multiply it by the window area. Then everything is simple: multiply the paint consumption per m2 by the area of the painted surface and the number of layers. This will help you roughly determine how much paint you need for one window.
New wooden window
New wooden frames are much easier to paint, because they do not need to be cleaned of the old coating. But this does not mean that you can immediately apply the paint - the surface must be properly prepared. It is recommended to paint the frames before installation and glazing, otherwise some areas will remain unprotected and deteriorate faster.
Wood windows are best painted before installation
Step 1. Place the frame on a flat, clean surface and processed from all sides with fine sandpaper.
This will help get rid of unnecessary roughness, small protrusions and other defects. Be sure to process sharp edges, slightly rounding the corners.
Step 2. Carefully sweep the dust formed during the grinding process, then carefully inspect the frame for chips, cracks and knots. As a rule, in new high-quality frames, such flaws are rare, but it is imperative to check.
Step 3. The revealed defects should be covered with wood putty.
Oil-based filler works well under oil paint, acrylic filler is recommended for the rest.
Acrylic putty on wood
Before applying the composition, all recesses are once again dedusted, if necessary, dried with a hairdryer. The putty is applied with a narrow plastic spatula, carefully filling the cracks.
If the recesses are wide, the mixture is applied in thin layers no more than 3 mm thick. Coating intervals are 2-4 hours, depending on the composition.
Tip. To seal cracks in the window frame, you can make a do-it-yourself putty. To do this, take dry sawdust, sift them through the finest sieve and mix with wood glue to a pasty consistency.
After applying the composition, you need to wait until it dries completely, and then carefully sand the treated areas.
Do-it-yourself putty on wood
If the frames are made of coniferous wood (larch, pine), on resin may protrude. In such areas, the paint lays down poorly, and the varnish may not adhere to the tree at all, so additional processing is necessary.Small areas of resin are best cut with a sharp knife and repaired with filler. If there are a lot of resin streaks, it is more convenient to use a solvent - turpentine, acetone, white spirit and others.
The solvent is applied with a brush to the resin and rubbed until foam appears. After that, the surface is washed with warm soapy water and dried.
Step 4 ...
After drying, the treated areas are sanded to achieve a perfectly flat surface. Next, wipe off the dust with a damp, clean cloth and let the material dry again.
Step 5. Clean dry frames should be primed with protective compounds. If you plan to preserve the natural look of wood, choose colorless antiseptic primers such as Pinotex Base, Belinka Base, Drevnochron Grunt and others.
Primer PINOTEX Base
The window surface can be treated with linseed oil under oil paint. To apply the primer, it is recommended to use a medium-width paintbrush, so that it is convenient to work and the composition is less sprayed.
First, completely prime the frame from the front side and sides, and when the surface dries up a little, turn over the structure and process the second side. As a rule, new wood quickly absorbs the primer, and for high-quality impregnation, primer must be primed at least 2 times. And if the material is too porous, you will need 3 coats of primer.
Observe the intervals between coats so that the compound is evenly distributed between the fibers.
Apply the primer with a brush
Step 6. When the primed frames are completely dry, you can proceed with the finishing ...
Choose a handy tool (roller, spray gun or brushes), thin the paint if necessary, and start painting the frame.
Tools for painting windows
First, paint over the inner corners and samples for glass using a thin brush, then paint the even areas. The paint layer should be very thin, so do not put too much on a brush or roller, rub the composition well over the surface. Feathering is done in one direction, along the bindings, so the strokes will not be visible after drying. Remove streaks and sags immediately, then it will be more difficult to do.
Paint the frames in a well-ventilated area
After finishing work on one side, the frame is very carefully turned over and the other side is painted. To prevent the paint from getting dirty from below, you need to put two sticks wrapped in foil under the frame, or something similar from improvised means. To give the surface a uniform deep color, you will need 2 or even 3 coats of paint. Respect the manufacturer's specified time between coats.
For painting, choose a warm, windless day in dry weather.In the heat, the paint dries quickly, reaches for the brush, and this interferes with high-quality shading. In wet weather, wood absorbs moisture, which leads to a decrease in paint adhesion and the appearance of bubbles. Well, the wind brings dust and debris, which immediately stick to the fresh paint.
While the frames are drying, you can paint the glazing beads that you will attach to the windows, as well as other wooden elements - platbands, window sills, shutters, if any.
If you are not going to change windows, but only want to update those that are available , the order of work is somewhat different from that described above. For high-quality restoration, it is recommended to carefully remove the frame from the window box so as not to damage anything.
Removing the sash
Step 1. First, the platbands are dismantled, the windows are removed from the hinges and laid flat surface. Next, you should very carefully remove the glazing beads so that the glass does not crack.
If window putty was used instead of glazing beads, remove it with a knife, wide screwdriver or putty knife. Be careful here as well, as the blade can easily slip off and break the glass.
Removing the old putty
Step 2. Since the glass no longer holds anything, you can carefully pull out and set aside. Now the most difficult stage is removing the old paint.
There are several proven options:
Clean off the old paint
Delete or not delete the old paint
The first method gives good results only if the paint is cracked and weakly adheres: it is enough to pry it from below with a blade, and the old coating will fall off in pieces.
Tip. If the paint adheres very firmly, there is very little visible damage and the same composition was chosen for painting, it is not necessary to completely remove the coating. It is enough to process the frame with sandpaper to remove defects.
Step 3. After removing the paint, wipe the frame with a clean cloth to remove small particles and inspect the surface for damage. Rotten areas need to be scraped out with a knife to a solid foundation, loosened jumpers should be reinforced with self-tapping screws. Cracks, chips, depressions are filled with putty.
As soon as the putty is dry, the frame is processed from all sides with a grinder or grinder with a grinding attachment. The surface must be absolutely smooth, even, without roughness.
Sand the applied filler
Step 5. The frame is primed, dried and proceeded directly to painting. Usually 2 coats of paint are enough if the surface is properly prepared.
Be sure to apply a primer
Apply a primer
While the frame is drying, the platbands are processed: they clean off the old paint, grind, apply a protective impregnation. Glazing beads are usually completely replaced with new ones, since they do not differ in durability. Next, they inspect the glass, change the cracked ones, clean off the dirt and traces of old paint. The window frame should also be checked for damage, gaps and gaps should be repaired, and painted. Such repairs will extend the service life of wooden windows by another 10 years.
After the frame has dried, the first thing to do is insert glass.
Glass fixing to wooden frame
So that no gaps remain between the frame and the glass, a silicone sealant must be applied around the sample. A construction gun is required to apply sealant - this is the most convenient and fastest way. The sealant should apply in a thin, even strip, without sagging. Having distributed the silicone, washed and dry glass is carefully placed on top and pressed for a few seconds.
The protruding sealant must be immediately wiped off with a damp cloth, since it is more difficult to remove it when it is dry. Having fixed one glass, proceed to the second, and so on until the end. On average, about 1 can of sealant is used for 1 window.
Insert glass and apply window putty (instead of glazing beads)
Align putty with a spatula
Allow the sealant to dry, then carefully fill the glazing beads. They act as an additional fastening of glass and perform decorative functions, since wooden windows with glazing beads look much more attractive.
Now all that remains is to insert the frame back into the opening, fix it, fill the platbands.
How to properly fix the glazing bead
Advice. The nails with which the glazing beads are nailed very quickly rust and leave stains on the glass, which noticeably impairs the appearance of the window. To avoid this, use special finishing nails with copper plated (copper plated).
It is not always possible to remove the frames from the hinges and pull out the glass.
In this case, you will have to work like this, taking care of protecting the glass from paint. There are several options: you can glue the glass with newspapers, treat it with soapy foam, stick masking tape. Using scotch tape is the most reliable and effective way. But first you need to remove the old coating from the window frame.
Under these conditions, it is best to use a blow dryer or a blower.
Warm air currents quickly soften the paint and can be easily removed with a spatula. To prevent the glasses from heating up during the cleaning process, you need to use a special nozzle for a hair dryer. Washing off also gives a good effect, the paint dissolves quickly and is removed with a scraper. After that, the window is washed to remove the smallest particles of old paint and left to dry.
Removing paint from a window using a construction hair dryer
Next, the surface is sanded with sandpaper, smoothing out minor defects, cleaned of dust and repaired putty cracks.
After the final grinding, strips of masking tape are glued around the perimeter of the glasses, and they proceed to priming and painting.
Protect the glass with masking tape
If splashes accidentally fall on an unprotected part of the glass, they must be wiped off immediately with a clean cloth. After applying the finishing layer of paint, carefully remove the tape from the glass. When the surface dries, the tape comes off along with the paint, leaving noticeable marks on the frame.
Painting the frame
Remove the tape
So, if you have plastic windows for a long time, and the white frame has already turned yellow, or the original color is just tired and you want to update the finish, the simplest solution is painting.
Plastic windows can also be colored
Painting PVC windows
For work you will need:
Step 1. First of all, thoroughly rinse and degrease the surface. If for some reason you can't buy a cleaner, use a dishwashing liquid. Thoroughly wipe off greasy stains, traces of silicone, other dirt, rinse with clean water.
Step 2 . After drying, the plastic frame should be sanded and rinsed again with clean water.
Step 3. Now the double-glazed windows and adjoining sections of the slopes should be covered with a film and fixed around the perimeter with masking tape. Glue the seals too.
We glue masking tape
Step 4. The prepared surface must be primed. Start priming from the corners, applying the composition in a thin layer and rubbing with a brush in one direction. Try not to leave dry areas, as the paint will lie unevenly there and will peel off very soon. For PVC, one coat of primer is sufficient.
Step 5. Once the frame is dry, you can start painting. For high-quality application, the diameter of the spray nozzle should be 1.6-1.8 mm, the pressure should be 2 atmospheres.
Low pressure spray gun
Paint for PVC windows
You can purchase spray paint - this will greatly simplify the work. A brush and roller will work as well, but this application may not always achieve a perfectly uniform coverage.
DIY painting of plastic windows
Painting from a spray
When the paint is dry, remove the protective films and tape
It takes about 8 hours for the paint to dry, but the maximum resistance to moisture and frost the coating will pick up only after 3 days. Therefore, it is recommended to paint windows before the onset of cold weather, in dry and calm weather.
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