Saturday 6 March 2021  

Masonry Wall Insulation with Dry Lining

Uninsulated masonry walls may be insulated thermally by constructing a dry wall frame on the inside of the existing structure. From an energy-efficiency point of view, the application of the insulating layer internally presents a number of disadvantages compared to external wall insulation.  Namely, thermal bridges are minimised to a much lesser extent, whereas the construction does not use the thermal mass of the masonry elements.  In addition, the reduction of habitable interior space presents a significant drawback.

However, in instances when external insulation of the buiidng envelope is not possible, internally placed insulation greatly enhances the thermal performance of building elements.  Specifically, when the building facade is constructed of exposed decorative materials (decorative brickwork, stone, etc.) which need to be retained, for the upgrading of listed buildings whose facades should remain intact, or when a party wall has to be insulated, internal insulation is an effective solution.  In new structures, internal insulation offers an efficient solution for demanding architectural designs where, for example, an exposed concrete facade has to be built.

Internally placed insulation assures faster heating in winter and faster cooling in the summer, since the required energy for each temperature change does not involve the mass of the structural elements. 

FIBRANgeo in masonry wall insulation with dry lining

  • FIBRANgeo B-570 stonewool insulation boards are placed in the dry wall frame.  Dry lining, e.g. gypsum boards, may then be fixed onto the frame, and finished with conventional dry wall finishing products.   
  • In interiors with high humidity levels, care should be taken to include a vapour barrier or vapour diffusion layer in the construction. 
  • Stonewool insulation, whilst providing excellent thermal insulation and fire protection to the building envelope, further enhances the sound insulating properties of wall structures from the tranmission of airborne sound. 

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