About building and repair - the main page About building and repair - the main page About building and repair - the main page About building and repair - the main page

Repair and colouring of steel roofs

To Paint steel roofs is better brushes. Brushes are desirable for applying mahovye (big), with a rigid bristle or volosom that gives the chance to rub a paint more strongly. To use for colouring platens it is undesirable: they do not rub a paint, and as though impose it, and besides a thick layer. It conducts to the paint over-expenditure, and quality of a covering turns out low as thick paint coats, drying up, screw up the face, burst, detain water that accelerates deterioration of a paint and a roof as a whole.

Depending on a condition of a roof it paint for one or for two times (a new roof for two-three times). The second colouring carry out only on the dried up layer. Roof descents in all cases paint on once more. Quality of colouring depends on technology observance.

The Good oil paint correctly put, has a brilliant surface after drying. In process of paint ageing its shine is gradually lost, it starts to burst and can depart from a roof films. It occurs because a paint, having lost elasticity, cannot be stretched, and metal at heating, as it is known, extends and breaks off not stretched paint layer. So the weight of the smallest cracks into which water gets is formed, causing roof corrosion. Hence, occurrence of cracks on a paint layer - a signal that new colouring is required.

Accelerate loss of elasticity of a paint layer non-uniform drawing of paint coats and application of a poor-quality paint, especially own manufacturing (by mixing of dry pigments with drying oil). Industrially the paint of ten hours frays in special installations, instead of simply mixes up. Therefore to try to make such paint - means to spoil materials.

Formation of bubbles on a paint layer occurs at colouring not enough dry (damp) surfaces, bad clearing of a roof of pollution, and also at paint drawing on the damp first coat and shpatlevku.

Before colouring the roof should be prepared carefully, having cleared of a dust and a dirt: to well cleared surface the paint sticks is better and longer keeps. Rusty places should be preliminary cleared of a rust and are painted over with careful shading of a paint. Is better to paint two times.

After that the roof is necessary for examining attentively: whether there are no on it through apertures which could arise, for example, after negligent clearing of a roof of snow steel shovels. Survey is better for spending to a sunny day when even the most smallest apertures will be well visible. This work carry out together: one person is on an attic with a long stick, and another - on a roof. The one who is on an attic, having found an aperture, knocks on it a stick, and the one who is on a roof, leads round this place a chalk.

Apertures on crests cover with usual putty, carefully smoothing its knife. Putty prepare from tonkosejanogo, absolutely dry chalk and natural drying oil. For podkrashivanija in it it is possible to add dry or grated oil paints. Such putty is strong, elastic, well sticks to metal surfaces and is well smoothed down. It slowly dries up, long time remaining soft, and therefore does not give cracks and does not fall off. Such putty can be applied and for zadelki small apertures on a roof plane. Sometimes it use for gluing of patches. In this case putty do a bit more liquid, put its thin layer on a roof, stack on it a patch from a dense fabric and after drying paint over.

However is better to impose patches as follows. From a canvas or a dense fabric the patch of the demanded size cut. From grated iron or lead minium on natural drying oil prepare smetanoobraznuju a paint, well impregnate with it the prepared patches, maintaining them in a paint for 10-15 minutes of the Patch before immersing in a paint should be absolutely dry! The patches taken out from a paint slightly wring out, impose on earlier painted over places and smooth hands or a rigid brush. Especially carefully it is necessary to smooth edges. In 5-7 days when the pasted patches will dry out, it is possible to start colouring.

Paint a roof in dry weather. Many masters - house painters assert that the paint serves longer if to paint a roof in the beginning of spring or in the end of summer, i.e. Not in the hottest weather. Then the paint dries up more slowly and forms a strong elastic film. If the prepared roof has staid before colouring more than two weeks it it is desirable obmesti soft, a broom or a brush to remove settled dust.

At the first colouring of a roof the paint should be more liquid, rather than at the subsequent. Therefore for the first colouring on 1 kg gustotertoj paints take 0,6-0,7 kg of drying oil, and for the subsequent - 0,4-0,5 kg of drying oil. For one colouring of 1 m 2 is required to a roof on the average: ohry - 180-200 g, mummies - 70-90 g, minium iron - 35-40 g, the medical Yankee - 250-280 (the above painting ability of a paint, the less it is required). The most long service life at the medical Yankee.

In 5-7 days after the first colouring a roof paint the second time, in 8-10 days - the third time (if necessary). Observance of such mode prosyhanija each layer of the put paint raises quality of works. Existing practice of secondary colouring in 1-2 days after the first quality does not give.

In the course of work the paint is necessary for mixing regularly that it was homogeneous. At normal pressing a brush in weight 400 g it it is possible to paint 600-800 ΠΌ2 roofs. On the new, just covered, steel roof the brush wears out less, and on earlier painted - faster because of a paint roughness.

First of all it is recommended to paint roof descents, to allow to a paint to dry up well, and then to paint all roof, shading a paint along a slope - from the fad to descents (not across!). The paint should be typed on a brush in a small amount and to shade its thin layer without rough strips and potekov.

To Work on a roof follows in footwear on a soft sole, for example felt or rubber. Such footwear does not slide on a roof, does not scratch a paint.

When on a roof there are no protecting lattices, it is necessary to be fixed by a cord for rafters, obreshetku or for beams, but only not for chimneys as in case of falling they will not sustain weight of the person.

Drainpipes paint the same as also a roof. That they served longer, them before colouring outside assort, clear of a dust and a dirt and paint from within for one or two times. Then establish into place and well fix.

As the steel roof from outside an attic as a result of influence of the condensed moisture also rusts, it is recommended to paint it. Paint a roof only between obreshetkoj, leaving obreshetku unpainted. If the steel in places has rusted, it is recommended to be cleared at first a soft steel brush (instead of a bristle a thin soft wire), and then to paint, applying usual mahovuju a brush or a bench hammer (a small brush on the short handle). Is better to paint for two times.

If it is necessary to replace single sheets of a roofing steel new it is necessary to prepare in advance. Sheets preliminary ground, i.e. Wipe a rag moistened with a liquid oil paint. When the paint will dry up, make preparation of sheets. After that it is desirable to paint sheets from the back party with an oil paint, well to dry up and only then to cover with them a roof.

If crests on a roof not everywhere densely adjoin in junctions them before colouring condense: a usual steel hammer or kijankoj - a wooden hammer. Thinnesses in crests cover with putty, dry it and then paint.