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        Installation & Maintenance-(2)

        Fecha:Jul 12,2011


        Armstrong suspended ceilings are interior finishes and the site conditions during installation should reflect this.
        Ceiling tiles should be stored for 24 hours before they are installed, in the area in which they are to be fixed,within a temperature range of 11º-35ºC.
        The stability of the temperature range is important as this can have a great affect on the relative humidity within a space and for products with lower humidity resistance in particular, the stability of the temperature is critical as an appreciable drop in the temperature may create humidity conditions which could be detrimental to the ceiling materials both installed and uninstalled.
        During winter months, heating of the jobsite may be necessary and the use of ‘dry’ heating should be considered because the burning of fossil fuels produces additional water vapour. Increased ventilation to eliminate the risk of condensation may be appropriate and also in summer months
        to control the temperature fluctuation due to solar gain.
        The use of thermal insulation on the back of a ceiling tile will alter the temperature gradient within a construction and its effect on the position of the dew point must be considered. If there is a risk of condensation, ventilation of the ceiling void and the use a vapour control layer
        between the suspended ceiling and the insulation may be necessary. Advice on these matters can be obtained from a specialist thermal engineer.
        The Armstrong range of ceiling tiles provides the industry with a choice of humidity resistance performances which will affect their suitability for different installation conditions.
        The Armstrong Design range of tiles have 70% (max.) relative humidity (RH) resistance while many of Armstrong’s most popular plain, textured and performance tiles offer a 10 year warranted performance when fixed and maintained in humidity conditions not exceeding 95% RH (max.) providing enhanced building programme flexibility and suitability for a wider range of applications and environments(1).
        Dune Supreme and Dune Max provide a lifetime Humiguard warranted performance for installations and
        conditions up to 99% RH (max.) enabling installation in a wider temperature range (0º-49ºC) and in more extreme humidity conditions(2).
        Armstrong Optima and Nevada soft fibre tiles, although only rated as 95% RH, are 100% RH imensionally
        stable, meaning that they can withstand temporary peaks of up to 100% relative humidity.
        For consistently high humidity environments Armstrong Ceramaguard and Newtone are 100% RH resistant.
        For these conditions they should be installed on corrosion resistant grid.
        Corrosion resistant grid is also appropriate for Parafon Hygien tiles if it is intended to subject them to a high pressure wash regime.
        Armstrong Orcal metal tiles provide 95% RH (max.) performance and certain Orcal products are vailable
        back-painted for 100% RH resistance.


        Once a building is handed over to the client, it is not always occupied at once.In this situation heating and ventilation may sometimes be decreased or switched off to save energy costs.In these circumstances conditions above and below the ceiling should be equalised and it may be necessary to
        temporarily remove tiles to facilitate this.This may not be possible if the ceiling is being used to provide passive fire protection to the building.
        Attention must also be paid to ensuring that the internal conditions are not allowed to exceed those that the ceiling tiles are designed to withstand. Heat build up due to solar gain may need dispersing by ventilation to reduce the risk of condensation occurring as the temperature falls. The effect
        of insulation on the back of the tile or in a roof construction also needs consideration and sufficient ventilation may be required to prevent surface condensation and a vapour control
        barrier to control the effects of surface or interstitial condensation.

        Categoría: information

        Palabra clave de la información:mineral ceiling installation