Declaration of Performance (DoP) - a document containing information on a product type and its performance. On 1 July 2013, on the basis of the Regulation no. 305/2011 (CPR) of the European Parliament and Council (EU) of 9 March 2011, a DoP replaced a certificate of conformity.
A DoP confirms that a construction product has been approved for marketing. A Declaration of Performance is attached to products subject to a Harmonised Technical Specification or a European Technical Assessment.
Issuing a Declaration of Performance and marking products with the CE mark means that a manufacturer is responsible for product conformance to the declared parameters.
Sound insulation is the partition ability of ensuring protection against noise. As regards plasterboards, sound insulation is equated with protection against air-carried sounds. Sound insulation is measured in decibels [dB], mainly using the RW, RA,1, RA,2, R’A,1 and R’A,2 indexes.
The basic requirements regarding sound insulation are defined in the PN-B 02151-3:1999 standard. Presently, work is underway to include a new version of the PN-B 02151-3:2015 standard in the Regulation on the technical conditions that should be met by buildings and their locations.
A fire resistance class describes fire resistance required for a given partition / building element.Fire resistance classes usually combine the criteria E and I, or R, E and I, e.g. EI 15, EI 30, EI 45, EI 60, EI 90, REI 120, REI 180. See the “Fire resistance“ definition for a more precise explanation of the E, I and R criteria.
Five building fire resistance classes have been established. They are marked in the descending order with the following letters “A”, “B”, “C”, “D” and “E”.
Elements of a building included in a given fire resistance class must meet the conditions defined in the Regulation on the technical conditions that should be met by buildings and their locations.
These are documents issued on the basis of tests by authorised research units which define the fire resistance classes (e.g. EI 30, EI 60) for tested building elements, e.g. as regards drywall systems - partition walls, covering walls, suspended ceilings, attic linings and dry screeds.
Fire classifications also contain detailed descriptions of solutions, information on materials used, drawings, solution details, joint details, etc.
K – flanking sound transmission, i.e. an allowance for the sound transmitted by neighbouring partitions (ceiling, adjacent walls). The K allowance depends on the partition geometry, method of joining it with other partitions and the type of adjacent partitions. Calculating the flanking sound transmission is usually a complex task for which an acoustician should be employed.
Applicable requirements for the required sound insulation power indexes are defined in the PN-B 02151-3:1999 standard (presently work is underway to include the new version of the PN-B 02151-3:2015 in the Regulation on the technical conditions that should be met by buildings and their locations).
Fire resistance is an ability of a partition / building element to meet specified requirements in conditions simulating a fire situation. During a fire, the most vital element is the possibility of evacuation so the measure of fire resistance is the time from the beginning of the fire (measured in minutes), during which the below criteria are still met:
RA,1 – apparent sound reduction index taking into account the spectrum adaptation term C (RA,1 = RW + C), measured in [dB]. A value obtained in a laboratory test performed on a partition. An index corresponding to the sound insulation protecting against medium- and high-frequency air-carried sounds characteristic for e.g. social noise generated by people. This index is used mainly to assess the sound insulation of internal partitions.
R’A,1– apparent sound reduction approximate index R’ taking into account the spectrum adaptation term C. The R’A,1 index takes into account the sound insulation power protecting against medium- and high-frequency air-carried sounds achieved in given application conditions. Thus R’A,1 takes into account the flanking sound transmission K. The value of the index is obtained during a field acoustic test or estimated in calculations. It is used mainly to assess the sound insulation power of the majority of internal partitions.
RA,2 – apparent sound reduction index taking into account the spectrum adaptation term Ctr (RA,1 = RW + Ctr), measured in [dB]. A value obtained in a laboratory test performed on a partition. An index corresponding to the sound insulation power protecting against low-frequency sounds characteristic for, e.g. external noise (heavy street traffic). This index is used mainly to assess the sound insulation of external partitions.
This index is determined by decreasing apparent sound reduction index RA,1 by allowing for performance errors (RA,1,R = RA,1 – 2 dB). The index is used to assess partition walls in multi-family building block of flats and to estimate the acoustic insulating power R’.
RW– weighed sound reduction index, measured in [dB]. It is used to generally assess a partition according to requirements applicable in the majority of EU countries. It is a value obtained in a laboratory test performed on a partition. The value corresponds to the 500 Hz sound frequency on a reference curve from an sound insulation power chart for a partition.