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(UNI EN ISO 140/3 - UNI EN ISO 717-1 - EN 14351-1 - UNI EN 20140 part 10)

The ability of an element in a building (window, rolling shutter box, door, etc.) to provide passive protection against noise and to insulate domestic interiors. The soundproofing power of a product is expressed in decibels (dB) and is denoted by Rw (C; Ctr). This value can be determined through a direct test method, set out in international regulation UNI EN ISO 140/3, designed to verify the sound-insulating power of a window installed on a partition wall of a double reverberant room. Alternatively, this value can be determined by using the tables contained in regulation EN 14351-1: this requires the knowledge of a product’s air permeability class, number of seals, and sound insulation of the double glazing to be used.

Doc Legno window (item 68/68) has a sound insulation of Rw = 43 dB


Sound insulation (UNI EN ISO 140-3 - UNI EN ISO 717-1)
Top 68/68
with 4 + 4 glass. 1 Stratophone / 15 argon / 3 + 3 top 
Sound insulation index: Rw 40 (-3, -7) dB. 
68/68 top with 4 + 4 glass. 2 Stratophone / 15 argon / 4 + 4. 2 Stratophone top.

Sound insulation index: Rw 43 (-3, -7) dB

According to regulation UNI EN ISO 717-1, the evaluation index for maximum sound-insulating power is equal to R'max = 65 dB

Elite 92 with 6+6 glass. 1 stratophone / 15 argon / 4+4. 1 stratophone top.
Sound insulation index: Rw 45 (-2;-5) dB
According to regulation UNI EN ISO 717-1, the evaluation index for maximum sound-insulating power is equal to R'max = 67 dB


(UNI EN 1027 - UNI EN 12208)

The ability of a window to resist water infiltrations, even in the presence of a pressure difference between inner and outer pane surfaces. The test method specified by the regulation is conceptually identical to that of air permeability, except that, in the water resistance test, the external surface of the window pane is sprayed with water.
Depending on the pressure reached before the infiltration occurs, the frame is classified according to regulation UNI EN 12208, which provides up to nine classes of performance (also depending on the product’s level of exposure) - 1, 2, 3, 4 , 5, 6, 7, 8, 9 (method A or B). The highest classification of water resistance performance is class 9.

Doc Legno windows (Item 56, Item 68) belong to class 9A.


(UNI EN 1026 - UNI EN 12207)

The characteristic of a closed window to let air filter inside when there is a difference in pressure between its inner and outer surfaces. According to the test method, the window must be secured to the test wall: test equipment then causes a pressure difference between the window’s inner and outer surfaces, thus enabling the measurement of volume of air dispersed. Determination of the frame’s air permeability is based on the volume of dispersed air, total area of the window, and length of extendable joints.
Classification is determined by regulation UNI EN 12207, which includes 4 classes of performance (1, 2, 3, 4). The highest classification of performance against air infiltration is class 4.

Doc Legno windows (Item 56, Item 68, Item 92) belong to class 4.


(UNI EN 12211 - UNI EN 12210)

The ability of a window to maintain a tolerable level of deformation, to maintain its properties and to ensure user safety when subjected to significant pressure and/or depression (such as those caused by wind). Conceptually identical to the previous one, this test method considers higher differences in pressure between outer and inner surfaces and very rapid achievement times. Basically, the window is exposed to sudden and intense pressure differences, after which its capacity to maintain its functional and performance characteristics is verified. Regulation UNI EN 12210 provides 5 classes of wind resistance performance (1 , 2 , 3 , 4 , 5 ) and 3 classes for the relative front arrow (A , B, C ).

Doc Legno windows (Item 56, Item 68) belong to class 3C.


(UNI EN 13049)

The soft and heavy body impact test verifies the window’s ability to withstand sudden and accidental collision with things or people without posing danger for the user. The test considers the impact of a mass, consisting of a wheel of 50 kg (image 2), falling from a given height onto one side of the sample window in certain specific points, as indicated in regulation UNI EN 13049, and identified as the most critical in relation to the stress inflicted.
The aim is not to verify glass resistance, but to evaluate all interactions between the materials involved, in order to guarantee a safer product for the user. The UNI EN 13049 test regulation contemplates 5 different performance classes, depending on the height of the wheel’s fall. The greater the anticipated height of the fall, the higher the performance of the product. Class 5 is the highest, while class 1 is the minimum compliance level.

Doc Legno window (Item 92) belongs to performance class 5.


(UNI EN ISO 10077 / 1)

The thermal transmittance coefficient indicates the level of energy (warmth/refrigeration) dispersed through the surface of the window.
To determine this, the window’s specifications (thermal coefficient of double glazing, wood type, average thickness of frame/sash, inner and outer resistance) must be entered in a specific calculation program.
The coefficient is expressed in W/m²K. The resulting number is directly proportional to the heat dispersed through the window.

Doc Legno window (item 56) has Uw = 2.1 W/m²K
Doc Legno window (item 68/2) has Uw = 1.8 W/m²K
Doc Legno window (item 68/68) has Uw = 1.4 W/m²K
Doc Legno window (item 92) has Uw = 0.8 W/m²K


(UNI EN 107 - UNI 9158)

Mechanical tests carried out on a window determine the effort needed to open and close it; enable the verification of its reaction to mechanical stress, through the simulation of potential misuse; evaluate the effectiveness of its locking and opening mechanisms; and investigate the appropriateness and durability of the frame and accessories. According to regulation UNI EN 107, different windows are subjected to different types of stress. After completing the test, the window is checked for unacceptable breaking and warping, and to ensure that its operability has remained unaltered.

Acceptance limits are defined by regulation UNI 9158.