Isoboard Thermal Insulation Applications


  • Nail Up Ceiling Nail Up Ceiling Fit brandering to room perimeter, and at max. 700mm centres one direction only. IsoBoard is fixed to brandering using adhesive and concealed fixing clips. Use dry wall screws at 300mm intervals on the perimeter where cornices will be installed. Apply adhesive in 5ml blobs every 200mm, coverage is approximately 30m2 per litre. Clip usage is 3 per m2. IsoBoard can be retrofitted below an existing ceiling to cover damage, provide insulation or change the appearance. IsoBoard can also be fixed below a concrete soffit. Fit brandering below the soffit or other ceiling if necessary to allow for rough or sagging surfaces. When fixing IsoBoard between existing trusses, rafters and brandering, use screws, clips and adhesive as for nail-up ceilings.
  • Over Rafter and Truss Over Rafter and Truss The boards are laid horizontally in long lengths, always beginning and ending on a truss or rafter. If installing over trusses, the top chords of the trusses must be braced below the IsoBoard, as per architect/engineers specifications, to prevent lateral deflection under load. Battens or purlins secure each board into position, having timberfix or equivalent screws fixed through the purlins. Pre-drill guide holes to ensure screws are centred correctly over the truss or rafter. If fitting IsoBoard below a steel roof, install fibrous acoustic insulation over IsoBoard to dampen weather noise.
  • Inverted Roof Insulation Inverted Roof Insulation IsoBoard is laid above the water proofing layer and secured in place using ballast, to prevent flotation or wind uplift. The ballast layer can be gravel, paving stones or a concrete screed. The water proofing is protected from the sun and weather by the IsoBoard, rendering it practically maintenance free. The thermal mass of the concrete slab is maintained at the internal temperature of the building, protected from daily variation, helping to maintain a constant temperature within the building. Inverted Roof insulation can be installed onto a new building, or as a retrofit solution later. IsoBoard excels in Inverted and Green Roof applications, as it is the insulator least affected by water.
  • Over Purlin Insulation Over Purlin Insulation IsoBoard is laid over purlin, always beginning and ending on a purlin. The board can follow a 5m radius for curved roof applications. Use T sections to increase the unsupported spanning capability of the IsoBoard. The IsoBoard is clamped to the purlin by the roof screws securing the roof sheets or the clip-lock type fittings. Remember to use longer roof screws to accommodate the thickness of the board. If IsoBoard is clamped in direct contact with a Chromadek or similar painted roof sheet, fit 3mm masonite spacers to prevent possible squeaking noise. Spacers are not necessary if a clip-lock system is used. IsoBoard can be used to clad the sides of steel frame buildings.
  • Surface Bed Insulation Surface Bed Insulation The IsoBoard can be installed either below the screed above the floor slab, or below the floor slab. As a rule, if planning to have an electric heating system to warm your floor, install IsoBoard below screed, to minimize the volume of concrete to heat, to control heating costs. If planning a solar water heating system , install the IsoBoard below the floor slab, as the slab will gradually release retained heat into the building at night. An insulated floor without any under-floor heating can be expected to be warmer than an uninsulated floor by 4 to 5 °C. SANS 10400XA requires that all heated floors are insulated to a minimum thermal resistance of 1, i.e. 30mm IsoBoard. Specialized applications of this type would include ice rinks and cold rooms.
  • Cavity Wall Insulation Cavity Wall Insulation Cavity wall insulation is an excellent way of controlling heat transfer through walls, as well as preventing moisture condensing on and penetrating the inner leaf. As homes become smaller and taller, the ratio of roof area to wall area decreases, and the impact of heat transfer through the walls increases. Essentially, the boards are fixed horizontally to the inner leaf using wire ties, alternate ties are used to secure the two leaves together across the cavity. Remember to keep the cavity clean.
  • Foundation Perimeter Insulation Foundation Perimeter Insulation The effect of this application is very similar to under floor slab insulation, however, perimeter insulation can be a retrofit installation. IsoBoard is inserted against the foundations of the building on the outside from the surface to the depth of the foundation or 600mm, whichever is greater. By insulating your foundations to this depth, your building is not subjected to heat transfer through the floor from adjacent soil temperatures, which may range from 40 °C to frozen. The IsoBoard insulation maintains your floor slab at an even moderate temperature, assisting in controlling the temperature of the building.