layer thickness. Nice to know! Air has a diffusion resistance factor of μ = 1 Mineral wool has a diffusion resistance factor of μ = 1.5 A vapour check, e.g. Ampatex DB 90 (thermoset endless fibres with pol [...] the diffusion resistance of a material usually used in construction (e.g. 20 cm concrete) with the resistance of an air layer of 1 meter thickness. We call this value diffusion equivalent air layer thickness [...] (p s = 4,241 Pa). At 20 °C, the air can only absorb max. 17.31 g/m 3 of water vapour. (p s = 2,337 Pa). At 10 °C, the air can only absorb max. 9.41 g/m 3 of water vapour. (p s = 1,227 Pa). At 0 °C, the

SealForm 660 Neu Moulded part 660: Roof window skirt as U-shape Details Ampacoll SealForm 20/410 Neu Moulded part 20/410: Pipe collar for chimney Details Ampatop SealStripe GHS Strip-shaped blank of Ampatop [...] Ampacoll DoubleSeal Double-sided adhesive moisture-resistant acrylic tape Details Ampacoll SealForm 1 Moulded part 1: Corner short 90° Details Ampacoll SealForm 5 Moulded part 5: Round patch Details Ampacoll SealForm

from the 20-year premium warranty. download Our guarantees in detail General Warranty Conditions General Warranty Conditions for the 10-year craftsman's guarantee and the 20-year premium guarantee. 1. Scope [...] extension: Ampack AG 20-year premium warranty a) For specific properties, the 10-year skilled manual worker warranty can be extended to 20 years for certain products. In partial amendment of 1a), 2a) and 4f) [...] Ampack products for more than 20 years. This offers much greater protection at no additional cost: Ten-year full warranty, plus 10-year material warranty. Ampack AG’s 20-year premium warranty covers:

timber construction. Material Density (kg/m3) Propagation velocity (m/s) Air (20 °C) 0 344 Air (-20 °C) 0 319 Rubber 900 – 1’200 50 Cork 200 – 350 430 – 530 Concrete 2’300 – 2’500 3’700 Wood along the grain [...] a frequency greater than 20,000 Hz is called ultrasound. Sound propagates through the air at a velocity of 340 m/s. This speed can vary greatly depending on the medium. Table 1 shows how well different [...] dB is still perceptible, a difference of 1 dB is barely audible. Sound source Distance Noise level Feeling Absolute silence 0 dB Unpleasant Ticking of a clock 20 dB Barely audible Residential area with

vapour seal. Rule 1 For a construction with existing ventilation or a diffusion-permeable external layer (e.g. timber formwork) Vapour check with a low s d -value im Bereich von 5 bis 20 m Merke: Innen so [...] diffusion-blocking outer covering Vapour seal with a high s d - value between approx. 20 - 100 m Notice: Inside apprix. 20-fold diffusion resistant than outside. Rule 3 Rooms with a constantly high level of [...] indoor swimming pools, saunas, laundries, hotel kitchens, etc. Vapour seal with a high s d - value from 1'500 m Nice to know! When choosing the definitive vapour check or vapour seal we generally go for the

airborne sound by means of a separating element. The calculation is fairly simple. As shown in Figure 1, part of the incident sound energy (Ee) is reflected (Er) on the surface of the separating element (B) [...] by the separating element itself (Ea). Another part (Ed) escapes into the neighbouring room. Figure 1 B separating element (ceiling, wall) Ee incident energy Er reflected energy Ea absorbed energy Ed emanating [...] component can be recognised by the difference in the sound level between the transmitting room (sound level 1) and the receiving room (sound level 2), as shown in Figure 2. This sound level difference depends on:

is emitted in this household. Nice to know! In a 4 1 / 2 room house with 300 m 3 of space from which water vapour cannot escape, the ambient air at 20 °C could absorb up to 300 x 17.31 g/m 3 = approximately [...] relative air humidity In our example, we calculate the relative air humidity φ in two ways, namely 1. by comparing the absolute with the maximum amount of water vapour in the air, or 2. by comparing the [...] of the air and are therefore not noticeable. Occupants : A person's breath and perspiration produce 1 to 2 l of water vapour per day. Therefore, in a household with 4 persons (2 adults + 2 children) ap