Plastic entrance winter doors

When you hear “plastic entrance winter doors?”, the first thing that comes to mind is just thick plastic and a couple of sealing contours. But in practice, if you have done installation or selected objects, you understand that a winter door is a system where there are no trifles. Many customers, and some colleagues, sin by looking only at the thickness of the canvas or the design, losing sight of the frost resistance of the seals, the design of the threshold and, what is critical, the preparation of the opening. I got burned by this myself when, in one of the buildings near St. Petersburg, after the first winter, ice appeared around the perimeter - the problem was not in the door itself, but in an improperly insulated slope and a “floating” one. threshold.

Design: not just “thicker means warmer?”

The main misconception is to chase the maximum profile thickness. Yes, five-chamber systems are better than three-chamber systems, but if there is no steel reinforcement inside of the correct configuration, the door can fail. during temperature changes. I saw products where the thickness was stated to be 70 mm, but the thermal break was done somehow - the cold bridge in the lock area negated all the advantages. A winter door should be precisely a system: the profile, double-glazed windows (if any), threshold and fittings work together.

Compaction is a separate issue. Two circuits are the minimum for our climate. But it is important that these are contours of different types, for example, magnetic around the perimeter of the canvas and rubber sponge around the box. And the sealing material must be frost-resistant EPDM; ordinary rubber hardens in the cold and loses its elasticity. Once they installed doors with seemingly good seals, but after -30 they began to let air through - it turned out that the manufacturer saved on the rubber composition.

The threshold is often the weakest point. The most reliable option is an aluminum threshold with a thermal insert and a lifting and turning mechanism. It provides a tight seal when the door is closed and retracts when opened. But there are also nuances here: the mechanism must be protected from icing. At one of the facilities in a private house, the threshold simply stopped rising due to condensation that was freezing inside - we had to disassemble and install a system with drainage channels.

Installation: an ideal door in a crooked opening is just scrap metal

You can buy the most technologically advancedplastic winter entrance door, but if the installers do not level the surface and foam the gaps taking into account the dew point, all properties will disappear. The main principle is that the door should be mounted in the warm contour of the wall. Often, especially in old panel houses, the opening is a continuous bridge of cold. You can’t do without preparation: dismantling the old box, insulating it with polyurethane foam or mineral wool, waterproofing the outside.

A mistake that is often made is installing the door only on polyurethane foam. Foam is a sealant and insulation, but not a load-bearing element. It is imperative to fix the box with anchor plates or chemical anchors to the main part of the wall, otherwise over time the geometry will “float”. I myself once saw how, after a season, a door began to wear down in the upper corner - the reason was precisely that it was “planted?” only on the foam, and it sank.

Another point is the external finishing of the slopes. If you leave just a foamed seam on the outside, even under the casing, moisture and frost will do their job. You need to either make a warm slope with insulation and plaster, or use special additional elements with a thermal break. For commercial properties, where both appearance and functionality are important, this is especially critical.

Double-glazed windows and light: where is the balance between heat and light

Bplastic entrance doorsoften they want to install a double-glazed window to make it brighter in the vestibule or hall. With winter doors this is risky, but solvable. A single-chamber double-glazed window is immediately a weak link, even with an energy-saving coating. The minimum is two-chamber (formula), and better - with argon filling and low-emissivity i-glass. But even here the weight of the structure increases, and reinforced fittings are needed.

I had experience installing a door with large glazing in a country house. The customer wanted a panoramic view. We installed a double-chamber double-glazed window with a multifunctional coating. In terms of warmth, everything is fine, but another problem arose - condensation on the edges of the glass in severe frosts. The reason is the aluminum spacer frame (spacer) in the double-glazed window, which froze. The solution is to use a “warm frame” from polymer materials. This is now a mandatory item in the specification for winter doors with glass.

Sometimes it makes more sense to completely abandon glass in its pure form and use sandwich panels with a decorative insert that imitates glass, or polycarbonate panels. They are lighter and provide better thermal insulation. But this is a question of design and customer perception.

Fittings and locks: what works at -40

Handles, hinges, locks are what a person interacts with every day. And if in the summer any fittings work, then in the winter surprises begin. Zinc handles become icy in the cold, and lock mechanisms can jam due to trapped and frozen condensate. Therefore forwinter entrance doorsyou need to choose fittings marked “winter?” or “frost-resistant?”. This usually means using certain types of steel, special lubricants in the mechanisms and, often, anti-corrosion coating.

Castles are a different story. Lever locks are usually more resistant to cold than cylinder locks due to their simpler mechanics. But if you need a cylinder, then only with anti-icing protection and frost-resistant lubricant. Scandinavian and German manufacturers, who initially take into account the harsh climate, perform well. Chinese analogues, even those that are similar in appearance, often fail after the first serious cyclone.

The hinges must be adjustable, on at least three axes, and preferably with a bearing. The door is heavy; in winter, due to temperature changes, it can slightly change its geometry, and the possibility of adjustment without complete dismantling saves the situation. In practice, you often come across the fact that the hinges are not designed to support the weight of the insulated sheet with double-glazed windows - after six months the door sags.

Market and choice: what to look for besides price

Now there are many offers on the market, from nameless “designers?” to brand systems. Cheapwinter plastic door- almost always an oxymoron. Savings are made on everything: on the thickness of the external walls of the profile, on the quality of seals, on fittings. Such a door may be airtight during installation, but after a year or two problems will begin on all fronts.

There are companies that specialize in complex solutions. Here, for example,Anhui Wantai Woodworking Co.,Ltd (https://www.anhuiwantai.ru). They are known in the international market for wooden doors where they combine design and practicality. Their approach is to build a business on precision and win with quality, strictly adhering to standards at all stages. Although their main focus is wood, this quality control approach is exactly what is needed to produce truly reliable plastic winter doors. If a manufacturer keeps its brand on one material, there is a high probability that it will approach plastic with the same responsibility, with modern production and experienced engineers.

When choosing, you need to require not just certificates, but technical specifications: heat transfer coefficient (Uf for profile, Ug for glass), air and water resistance class, heat transfer resistance of the entire door (R0). And look at the guarantee. A 5-year warranty on the entire structure is a good sign. A 1-year warranty is something to think about.

As a result, the ideal winter door is not a specific model, but a system correctly selected for a specific object: with the right profile, proper glazing (or without it), frost-resistant fittings and, most importantly, a professionally prepared opening and installation. To save on one thing means to get a problem in the future. Tested from my own experience, more than once.