Window installation: Saint Petersburg company ranking

Place	Company	Score
1	Okonnaya kompaniya RS	9.9
2	Osteklenie kottedzhey	9.3
3	Alyuminievye okna SPb	9.2
4	Derevyannye okna SPb	9.1
5	Osteklenie balkonov	9.0
6	Oknosfera	8.8
7	StroyKomfort	8.7
8	Okna 78	8.7
9	Etalon Okna	8.5
10	Stroy Vector	8.5
11	Okna Panorama	8.4
12	Remont Okon SPb	8.3
13	Plastikovye okna SPb	8.3
14	Mizantin	8.0
15	Okna komforta	7.9
16	Okna RTS	7.9
17	OK Land	7.5
18	Kamet · specialist	7.5
19	Dogma	7.4
20	WinDoors	7.3
21	Timofeev Okna KBE	7.1
22	Okna Weka	7.0
23	Okna Kontakt	7.0
24	Ecookna	6.9
25	Sab-KBE	6.8
26	Okna FORTE	6.8
27	Ultra Okna Garmoniya	6.8
28	Okna v dom	6.7
29	Okna rosta	6.7
30	Okna ot Prirody	6.6
31	OknaPomoshch	6.6
32	Novye okna Peterburga	6.4
33	Fenster · specialist	6.4
34	Okna-Neva	6.2
35	Remont okon	6.1
36	Design-okno	6.1
37	Eurostil	6.0
38	Garant stroymontazh SPb	5.8
39	Pomoshch oknam	5.7
40	KS-okna	5.6
41	Ultra Okna Piter	5.6
42	Okna REHAU	5.6
43	Oknovichkov	5.5
44	Razumnye Okna · specialist	5.5
45	Okno v Peterburg	5.3
46	Terrasi Udachi	5.1
47	S-Industriya	4.5

The Saint Petersburg window installation ranking covers 47 firms in the city and the Leningrad Region. Places use the main five-criteria methodology, and a company whose core business is installation gets a 0.5 point bonus. Below the table we explain how to read it and what to check with the crew before you sign.

Who is included

A company has to describe the service on its own website, in a separate section or on the home page. A mention in a customer review is not enough.

How to read the places

The total is made of reviews (35%), price transparency (20%), warranty on the work (20%), years in business (15%) and replies to negative reviews (10%). Map averages are smoothed, so eight five-star ratings cannot overtake hundreds of slightly lower ones.

The "specialist" mark goes to a company that names installation in the headline of its home page, in its company name or as its main 2GIS category. It adds half a point, and the maximum stays at ten. The calculation is explained in the methodology.

What to check with the installers

The installation joint under the Russian standard GOST 30971-2012: three or four layers. The middle one insulates, the outer one protects against rain and wind, the inner one keeps room vapour out.
Documents at the end: a record of hidden works, then an acceptance record.
Inspect the joint before the inner reveals are finished, while it is still open. Continuous sealing can be checked without opening it: a handheld pyrometer measures surface temperatures around the opening.
The warranty on the work as a separate line. GOST 30674-2023 recommends at least three years.
A cost estimate before work starts: the customer has the right to require one.
Annex D of the same standard suggests accepting the window in parts: the unit, the joint, the inner sill, the outer drip sill and the reveals, each against its own document, with the room climate meeting GOST 30494.

Why we score the installation warranty

The factory gives the warranty on the profile or glazing unit, but the crew answers for the joint with the wall. Products are tested in the factory lab, while the connection to the wall is first checked on site. Hence the rule: points go to the installers' own warranty. The standard links yearly maintenance to keeping the warranty, so ask about the terms in advance.