Improvements to existing windows. Atgarder med befintliga fonster.

Describes some improvements to existing windows, such as increase of thermal insulation and airtightness, easier handling of windows consisting of separate casements, repairs, maintenance and alterations to be made when old windows are replaced.< In the section dealing with thermal insulation, tests were carried out by installing a third pane in the windows in 10 houses, and by reducing ventilation between the panes in 20 houses.< Repair of some types of damage was observed in some case studies.

Windows and door height windows - Air permeability test.

Defines the method to be used for the air permeability testing of windows to be fitted in exterior walls and supplied in the form of completely assembled and finished units. Describes apparatus, test method and expression of results.

Changes of indoor climate in dwellings because of renewal of windows and tightening of joints. Indeklimaforandringer i bolige efter vinduesudskiftninger og fugetaetning.

In order to reduce heating energy consumption, single glazed windows are commonly replaced by double glazing and joints tightened in Danish dwellings. Reports investigation of the influence of such tightening of dwellings on the indoor climate. 25 tightened and 25 not-tightened identical flats were investigated. Finds an improvement in thermal climate and a significant reduction in heat consumption in the retrofitted flats. Finds absolute humidity of indoor air was significantly higher in improved flats, probably due to reduced ventilation.

Comparison between some existing performance requirements for air permeability and water-tightness in buildings.

Compares some existing performance requirements for air permeability and water-tightness of windows. Gives tables showing main European standards. Finds that a large variety of methods of test and grading systems is used and concludes that steps should be taken to unify the systems.

A relation between transmission loss and air infiltration characteristics in windows.

Reports tests on 4 different windows of air leakage and sound transmission loss. Expresses each of these two quantities by a single parameter and finds reasonable correlation between the parameters. Concludes, within the limitations of the method, that the air leakage class of a window can be deduced from field measurements of sound transmission loss, when the acoustical performance in perfect sealing conditions is known.

Guidance to specifiers in the use of mastics and sealants on site.

This is a short guide to mastics and sealants used to seal the joint between an aluminium window and a structure. Gives table of materials available, and their properties. Gives detailed instructions for applying sealants to window joints.

Development of an acoustic method for the determination of the air leakage of building elements installed in a building. Entwicklung einer akustichen Messmethod zur ermittlung der Luftdurchlassigkeit von Bauelementen in eingebauten Zustand.

The conduction of sound through the gap between window and wall depends on the width of the gap. This width also determines the air leakage, suggesting that air leakage might be measured by an acoustic method. Notes method requires that cracks are relatively large and have fewer than three kinks. Reports measurements in a wind tunnel of air flow through crack models made from aluminium and compares results with theory. Finds empirical expression relating pressure difference to air flow and gives graphs of results.

The variability of test results when assessing the resistance of windows to water and air penetration using BS4315.

Reports a programme of tests of the resistance of windows to air and water penetration. These were intended to assess the variation in the results due to different designs of window, differences between individual windows of the same type, different pressure test boxes, and different test operators. Gives tables of results and finds considerable variation but no single source of the variation. Suggests new test procedure and a statistical criterion for acceptance.

Weathertight windows and doors.

States that concern for weathertightness requirements for windows has increased recently. Discusses standard methods for testing air leakage and rain penetration of windows. Illustrates some general findings on air leakage. Discusses relationship between air leakage and rain penetration. Outlines characteristics of leakage through doors.

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