Clearly the flooring has taken up moisture from somewhere, causing it to swell. The first step is to find the source of moisture. We suggest you check the sub-floor ventilation to make sure it meets NCC requirements. The NCC calls for ventilation openings ranging from 2000 to 6000 mm2/m of external wall, depending on the climatic zone. If sub-floor ventilation is adequate, and the ground under the floor is not unusually damp, perhaps there is a plumbing leak letting moisture into the underfloor insulation. If you can find the source of moisture and allow the flooring to dry out it may shrink back to a level surface. Otherwise, if it remains a problem you might need a site inspection. The Australasian Timber Flooring Association (ATFA) provides this service, more information here: https://www.atfa.com.au/request-an-inspection.
Flooring swellingClient has installed a new spotted gum T & G floor on new joists with interfloor insulation . The house is a Federation house with a new concrete slab apron around the perimeter and an ag line. They had it acclimatising for 2 weeks in the interior under a fully enclosed house. They say the expansion joints are squeezed and the floor is bowed. The floor has a water based polyurethane finish ,which has had temp covering over it for protection. The house has not been occupied yet. What are your recommendations to remedy this?
We need to achieve group 2 for a timber battened ceiling. Is there anyway of achieving this without an applied finish?
All timbers we have tested fall into Group 3, no matter how dense. However, fire retardant coatings can be used on interior timber to achieve a Group 2 rating, including clear coatings for a natural finish. You will find suppliers if you search using the words 'fire retardants', 'intumescent coatings' or similar.
I am refurbishing a mezzanine of a warehouse to turn into a yoga studio. It is a 90sqm space with a suspended concrete floor on steels beams. It currently has carpet tiles and I am looking into putting a floating timber floor. Which timber would you recommend for this space?
One of the lighter-coloured timbers would probably be best, such as Victorian ash. Darker woods tend to show every speck of dust. You could consider installing your floating floor as a 'sprung' floor, more details here showing the various kinds of sprung floors: https://www.dance-floor.com.au/sprung-dance-floor. Sprung floors are popular where active movement takes place, such as yoga, gymnastics etc.
Sprung floor
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