Water leak detected by Building Manager near glass panel at
South-Eastern end of 8.4m water pool
Alex has identified water on the RHS of the above
and below pictures which has also appeared on the aluminium immediately outside
the glass panel in 3rd pic below
Alex has lowered the water level in the pool by 30cm to ascertain if the
moisture (evident to Alex from the outside hallway)
dries up, thereby hopefully determine if there is a leak from the rusted drip tray on
the LHS (of above pic) then penetrating under the five rows of floor tiles and
appearing as moisture outside on the aluminium in the
main hallway - see the above and below pics -
Rectifying the rusted aluminium drip tray is one of three o/s issues that my
unanswered email (sent Tue 03-Jul-18 7:13am) to fellow Strata Committee members
re the written report by Andrew Stewart of
Pinnacle Building Consultancy re staining to swimming pool soffit and
stalactites and a large stalagmite. That written report raised the three
matters/concerns. My above email requested fellow Strata Committee Members to respond with
their views re the three concerns raised by Andrew Stewart of
Pinnacle Building Consultancy.
The above pic was taken from the outside of the
gym/pool (in the hallway) after Alex spotted moisture seemingly permeating from the inside
of the glass panel - shown in the initial two of the above three pictures.
Hopefully, Strata Committee members will inspect this matter 'in situ',
that Alex detected and showed/explained to Phil Johnston on Friday, 13 July 2018.
Above and below pics taken on Friday, 27th July
2018 that evidence a 22mm lower water level from mid July to 27 July 2018
Three green tiles measure 66mm, therefore one green tile plus on cement
separator is 22mm. The water level has dropped by one green tile.
Ipso facto, the water has fallen by 22mm.
I do not know how many leaks there are from our water pool on ground level.
Based on the recently identified stalactites, there may be several leaks, which
is not uncommon with concrete, as a membrane is only as reliable as its weakest
In 2009, Owner, Phil Johnston, spread two applications of a waterproof membrane,
over the roof of a large double garage that he had constructed under an
Builder Permit that he received from Dept of Fair Trading after sitting
an exam on-line after studying requisite course material. One tries to
Drizoro membrane equally to say 4mm thickness, but there would be sections that are
only 3mm thick and other sections that are 5mm thick.
Picture 1 and
Picture 2 of the
membrane that Phil Johnston applied in late 2009 to the concrete slab roof in
his former double garage.
will penetrate the 3mm sections faster than the 5mm sections. Or indeed
the 2mm sections. We do not
know if the builder applied a water proof membrane to the surface of the
concrete pool, prior to the tiles being laid.
However, after 22 years, any waterproof membrane would be deteriorating, as
evidenced at Boy Charlton, Hornsby and North Sydney 50m Council Swimming Pools
that needed/need to be replaced at considerable expense that each took (will take)
over 15 months of replacement work.
Above is a 'screen
print' of my
Excel file that shows my calculation that 610 litres of chlorinated
water have leaked in 18 days circa. The most important figure
(regarding the damage that chlorinated water can cause to rust the steel
reinforcement in concrete) is the rate of leakage per day, week, or month.
Concrete has enormous compressive strength, but no tensile strength. The steel
reinforcing gives the concrete tensile strength. When steel rusts it
expands which accelerates the reduction in compressive strength. If the steel
around our 8.4m water pool rusts, the Owners Corp. faces major repair costs as
this concrete is not in sandstone, but above garages beneath it. Boy Charlton,
Hornsby and now North Sydney 50m Council (Concrete) Swimming Pools were all
sitting in sandstone with no
garages beneath them.