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- Die Luftdichtheit von Gebäuden wird mit einem Differenzdrucktest (Blower-Door-Test) bestimmt. Durch einen in eine Gebäudehülle (meist Tür oder Fenster) eingelassenen Ventilator wird innerhalb des Gebäudes ein konstanter Überdruck und Unterdruck von (zum Beispiel) 50 Pascal erzeugt und gehalten. Die durch Gebäudeundichtigkeiten ausströmende Luftmenge muss durch den Ventilator in das Gebäude hereingedrückt werden und wird gemessen. Der sogenannte n50-Wert (Einheit: 1/h) gibt an, wie oft das Innenraumvolumen pro Stunde umgesetzt wird. Richtwerte für den n50-Wert sind seit November 1996 in den Teil 7 der DIN 4108 aufgenommen worden. Die seit 2002 geltenden Energieeinsparverordnungen enthalten ebenfalls Grenzwerte. Die Messung erfolgt nach DIN 13829. (de)
- Air barriers control air leakage into and out of the building envelope. Air barrier products may take several forms:
* Mechanically-attached membranes, also known as housewraps, usually a polyethylene-fiber or spun-bonded polyolefin, such as Tyvek is a generally accepted moisture barrier and an air barrier (ASTM E2178).
* Self-adhered membranes, which are typically also a water-resistant barrier and a vapor barrier
* Fluid-applied membranes, such as heavy-bodied paints or coatings including polymeric based and asphaltic based materials
* Closed-cell medium density spray-applied polyurethane foam, which typically provides insulation as well
* Some open-cell spray-applied polyurethane foam that are of high density
* Boardstock, which includes 12 mm plywood or OSB, 25 mm extruded polystyrene, etc. Air barriers are divided into air barrier materials, air barrier accessories, air barrier components, air barrier assemblies and air barrier systems. Air barrier materials – Building materials that are designed and constructed to provide the principal plane of airtightness through an environmental separator, which has an air permeance rate no greater than 0.02 L/(s•m²) at a pressure difference of 75 Pa when tested in accordance with ASTM E 2178. Air barrier materials meet the requirements of the CAN/ULC S741 Air Barrier Material Specification. The air barrier materials are typically the "big" pieces of material used in an air barrier assembly. Air barrier accessories – Products designated to maintain air tightness between air barrier materials, assemblies and components, to fasten them to the structure of the building, or both (e.g., sealants, tapes, backer rods, transition membranes, nails/washers, ties, clips, staples, strapping, primers) and which has an air permeance rate no greater than 0.02 L/(s•m²) at a pressure difference of 75 Pa when tested in accordance with ASTM E 2178. Air barrier components are used to connect and seal air barrier materials and/or air barrier assemblies together. Air barrier components – Pre-manufactured elements such as windows, doors and service elements that are installed in the environmental separator and sealed by air barrier accessories and which have an air leakage rate no greater than 0.20 L/(s•m²) at a pressure difference of 75 Pa when tested in accordance with ASTM E 2357. Air barrier assemblies – Combinations of air barrier materials and air barrier accessories that are designated and designed within the environmental separator to act as a continuous barrier to the movement of air through the environmental separator and which has an air leakage rate no greater than 0.20 L/(s•m²) at a pressure difference of 75 Pa when tested in accordance with ASTM E 2357. Air barrier systems – Combinations of air barrier assemblies and air barrier components, connected by air barrier accessories, that are designed to provide a continuous barrier to the movement of air through an environmental separator, which has an air leakage rate no greater than 2.00 L/(s•m²) at a pressure difference of 75 Pa when tested in accordance with ASTM E 779 or CAN/CGSB 149.10 or CAN/CGSB 149.15. (en)
- Una barrera de aire controla el escape de aire dentro y fuera de la envolvente del edificio. Los productos de barrera del aire pueden tomar varias formas:
* Membranas mecánicamente atadas, también conocidas como housewraps; normalmente una poliolefina de fibra de polietileno o no tejida hilada, como el Tyvek, se acepta generalmente que es una barrera a la humedad y al aire (ASTM E2178).
* Membranas auto-adheridas, son típicamente también una barrera resistente al agua y una barrera al vapor.
* Membranas de aplicación de fluidos, como las pinturas de cuerpo pesado o los recubrimientos, incluyendo materiales basados en s y basados en asfálticos.
* Espuma de poliuretano de célula cerrada de densidad media aplicada en espray, que típicamente además proporciona aislamiento.
* Algunas espumas de poliuretano de aplicación enespray de célula abierta, que son de densidad alta.
* Boardstock, que incluye el contrachapado de 12 mm o OSB, poliestireno extruido de 25 mm, etc. Las barreras de aire se dividen en barreras materiales del aire, accesorios de barrera del aire, componentes de barrera del aire, ensamblajes de barrera del aire y sistemas de barrera del aire. (es)
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- Air barriers control air leakage into and out of the building envelope. Air barrier products may take several forms:
* Mechanically-attached membranes, also known as housewraps, usually a polyethylene-fiber or spun-bonded polyolefin, such as Tyvek is a generally accepted moisture barrier and an air barrier (ASTM E2178).
* Self-adhered membranes, which are typically also a water-resistant barrier and a vapor barrier
* Fluid-applied membranes, such as heavy-bodied paints or coatings including polymeric based and asphaltic based materials
* Closed-cell medium density spray-applied polyurethane foam, which typically provides insulation as well
* Some open-cell spray-applied polyurethane foam that are of high density
* Boardstock, which includes 12 mm plywood or OSB, 25 mm extruded polyst (en)
- Die Luftdichtheit von Gebäuden wird mit einem Differenzdrucktest (Blower-Door-Test) bestimmt. Durch einen in eine Gebäudehülle (meist Tür oder Fenster) eingelassenen Ventilator wird innerhalb des Gebäudes ein konstanter Überdruck und Unterdruck von (zum Beispiel) 50 Pascal erzeugt und gehalten. Die durch Gebäudeundichtigkeiten ausströmende Luftmenge muss durch den Ventilator in das Gebäude hereingedrückt werden und wird gemessen. Der sogenannte n50-Wert (Einheit: 1/h) gibt an, wie oft das Innenraumvolumen pro Stunde umgesetzt wird. (de)
- Una barrera de aire controla el escape de aire dentro y fuera de la envolvente del edificio. Los productos de barrera del aire pueden tomar varias formas:
* Membranas mecánicamente atadas, también conocidas como housewraps; normalmente una poliolefina de fibra de polietileno o no tejida hilada, como el Tyvek, se acepta generalmente que es una barrera a la humedad y al aire (ASTM E2178).
* Membranas auto-adheridas, son típicamente también una barrera resistente al agua y una barrera al vapor.
* Membranas de aplicación de fluidos, como las pinturas de cuerpo pesado o los recubrimientos, incluyendo materiales basados en s y basados en asfálticos.
* Espuma de poliuretano de célula cerrada de densidad media aplicada en espray, que típicamente además proporciona aislamiento.
* Algunas espum (es)
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