Architect and Builder Magazine South Africa Dec 2017 / Jan 2018 - Page 57

Drywall vs Traditional Build The environmental benefit of using Gyproc drywall systems reduction in global warming potential (kg CO 2 equiv/FU) was to make sure we used expertly manufactured materials.” The answer was drywall construction. Saint-Gobain Gyproc was contracted to specify 17,000m 2 of Gyproc plasterboard solutions for the walls and ceilings inside Zeitz MOCAA. “This development was a significant project and presented certain challenges. It meant that we needed to consider a distinct set of factors such as the safety of the museum’s visitors and artworks, structural capabilities and general comfort- enriching properties,” says Janet Thomson. The first step in Thomson’s approach was to enhance the museum’s safety by installing Gyproc Firestop RhinoBoard throughout. This allows people up to 120 minutes to evacuate in the event of a fire. Gyproc Moisture Resistant plasterboard was also used to help control moisture levels in the museum, which not only safeguards its collection from any potential water damage but has practical benefits in rooms like kitchens and bathrooms where moisture levels are higher. Next she considered the weight to strength ratio of the walls required. “When it comes to material selection, weight is a limiting factor in heritage site projects and it’s particularly important to keep structural load to a minimum,” explains Thomson, who used a drywall that is ten times lighter than traditional walls, assembled with noggins, load-bearing studs and tracks to reinforce additional stren gth. The results are interior walls which reach up to 23 metres in places, yet which are also strong enough to hold artworks of unknown weights while being light enough to comply with heritage building regulations and to be easily reconfigured. For aesthetic appeal, Gyproc RhinoLite Cretestone skim was used to plaster drywalls and ceilings throughout, creating a smooth, luxurious finish. Lastly acoustic Advertorial reduction in primary energy use (MJ/FU) and thermal properties were prioritised to ensure a restful, quiet and comfortable environment. A Rigitone Acoustic Ceiling was selected to create a buffer against excessive noise and help minimize sound transmission. “Installing the right materials contributed hugely towards the final outcome of transforming the old silo building into a sustainable architectural and artistic glory that now hosts some of the continent’s best artworks,” said Mark Noble. No 6 Silo/Radisson Red No 6 Silo, which houses the Radisson Red Hotel, was specified with Saint- Gobain’s Gyproc and Isover products. The success of this project was underpinned by various elements from specifying the project, project pack compilation, in house quantity surveyor cost analysis assistance and bill descriptions, to main contractor pull through and most importantly, by forwarding preferred Saint-gobain Gyproc installers to the design team upfront. The value added by the technical design department, on-site presence, the training of the main contractor as to correct installation and Saint-Gobain Gyproc’s SpecSure Warrantee, offered the design team peace of mind . The project went through many variations and value engineering processes, however the key was to ensure that maximum space was achieved in the hotel rooms. Due to the nominal wall width savings with drywall, extra room space was achieved. It was recommended that a fully skimmed wall would be more aesthetically pleasing to the eye than a jointed wall where critical light plays an important role. reduction in wall system weight (kg/FU) reduction in fresh water usage (L/FU) The ceilings throughout this hotel were Gyproc Rhinoboard 9.5mm full skimmed. In the restaurant area, due to potential high noise levels 15mm Firestop Board and Gyptone Big Line six was recommended by the acoustician, offering superior sound absorption to this area. Throughout the 250 hotel rooms, eight varieties of Saint- Gobain Gyproc drywalling types were specified and installed achieving either a Gyproc 60 minute or 120 minute fire rating. Predominantly Gyproc 15mm Firestop Board, Gyproc 15mm Moisture Resistant board in Bathroom areas and Isover’s CavityBatt were specified. A twin Stud system between demising walls ensured occupant privacy is maintained whilst achieving a 63dB rating opposed to that of a 43-48dB brick wall. Careful consideration was made when choosing the width of the Ultra Steel Donn Stud and Track ensuring that acoustic bridging was not prevalent at wall abutments. 57