The decision below on the performance of Termiglass
48 Before considering these three lines of attack, it is convenient to set out a summary of the learned trial judge's decision on the various aspects of this performance issue. Before doing so, I should point out that, while his Honour referred to the apposite Australian Standard as the 2000 Standard throughout his decision, for convenience, I will describe it (as I have already above) as the Australian Standard or, where appropriate, the 2000 version of the Australian Standard.
49 It is important, first, to record that Termiglass was manufactured at a factory called Vision Glass and the evidence showed that this factory was owned and operated by a subsidiary of Termicide. Further, while Vision Glass made a number of crushed glass products at its factory, Termiglass was unique because, as is detailed below (see at [50]-[51]), a specified portion (approximately 95%) of the crushed glass in Termicide had to fall into the 1.7mm to 2.4mm size range to meet the requirements of the Australian Standard. It was therefore important to be sure that the material that was said to be Termiglass was indeed the crushed glass product containing the sufficient proportion of this specified size range. This distinguishing characteristic of Termiglass led the learned trial judge to pose, at the outset of his examination of the effect of the representations pleaded, what he considered was a threshold question: whether each witness truly gave evidence with respect to Termiglass?: see at [67]. In turn, that caused his Honour to set out what he considered were the relevant requirements of the Australian Standard (see at [69]-[70]). His Honour described those requirements as follows:
69. To elaborate, Termiglass is supposed, based on advice received from Dr French, to consist of graded glass screenings comprised of particles in size generally between 1.7 mm and 2.4 mm (the so called "medium" size), which is within the 1.2 mm and 3 mm range mentioned in the appraisal.
70. Termiglass is also supposed to have other qualities the nature of which is dictated by what the CSIRO Appraisal incorporates by reference. Thus, the appraisal draws upon the 2000 Standard, para 2.3.3, which adds three performance criteria for particles:
(a) termite resistant;
(b) graded and shaped so that a sufficient proportion of the glass particles are of a size that cannot be transported by foraging termite species occurring in the region;
(c) able to be placed in a manner so that the voids between the particles do not permit the penetration of foraging termite species occurring in the region.
Termiglass is also supposed to meet these criteria.
50 Following this, his Honour elaborated on various aspects of the performance criteria in para 2.3.3 of the Australian Standard as they related to Termiglass, as follows:
(a) The words "sufficient proportion" in the Australian Standard (see [70(b)] above) meant that Termiglass was supposed to contain in the order of a 95% proportion of "medium" particles, viz 1.7mm to 2.4mm size range: see at [73].
(b) The 95% requirement was based on research in relation to the graded stone particle barrier called granitgard. It was not a rigid figure in the sense that a barrier comprised of a lesser percentage of medium particles would certainly fail: see at [74] and also [58(f)] below.
(c) Contrary to Granitgard's submissions, the Australian Standard did not require the glass particles to be of any specific shape, only that they be of a particular size and in a sufficient proportion with particular properties: see at [75].
(d) Apart from a requirement that there not be too many "flaky" particles - a requirement that particularly applied to crushed granite particles which contained mica - the shape of the particles was a distraction: see at [77].
51 In summary, the learned trial judge found that, to comply with the relevant performance criteria set out in the Australian Standard, Termiglass should contain a 95% proportion, approximately, of crushed glass particles in the 1.7mm to 2.4mm size range. Further, he found that there was no requirement in those criteria that the crushed glass particles had to be of any specific shape.
52 The learned trial judge then turned to consider the evidence about the various samples of Termiglass, or what purported to be Termiglass, produced during the hearing. His Honour observed that much of this evidence was problematic because there was doubt as to whether most of those samples "were indeed Termiglass as supplied to the market and installed by Termicide in its particle barrier system": see at [81]. His Honour first considered what he referred to as the "unofficial samples" at [82]-[96]. He then turned to consider the samples obtained by Granitgard from the Vision Glass factory on two occasions in June 2008 at [98]-[105]. In relation to the "unofficial samples", his Honour was not satisfied that any of the test results provided a reliable indication of the properties of the product known as Termiglass: see at [83] re the Bain sample, [85]-[87] re the French samples, [91] re the Sapsford samples, [92] re the Salvado Drive sample, [93] re the Upper Coomera sample, [94] re the Gargal Court samples, [95] re the Skip Bin sample and [96] re the Springfield sample.
53 In relation to the Vision Glass samples that were obtained by Mr Hunt in June 2008, the learned trial judge was satisfied that two of the four sample bags contained the product known as Termiglass (see at [100]-[101]). Significantly, he was also satisfied that the test results for those two samples showed 94% and 95% of the crushed glass particles within the size range of 1.7 to 2.36mm: see at [102].
54 The learned trial judge then turned to consider whether the product supplied by Termicide as Termiglass was what it was supposed to be. That required him to consider a number of issues in relation to the manufacturer of the product as supplied, viz the Vision Glass factory: see at [106]. His Honour undertook that examination at [107]-[119]. In the process, he noted a concession by Termicide that "because of the absence of documented controls, quality control at Vision Glass leaves something to be desired": see at [112]. In agreeing with that concession, his Honour made the following observation (at [112]) :
I accept that Termicide does undertake batch sampling and that, resultantly, batches of crushed glass from the factory are occasionally rejected. I thought though that here, too, that, apart from retention of samples, evidencing of this process was problematic. I accept that the sampling undertaken did not suggest a systemic inability on the part of Vision Glass to produce medium range crushed glass particles of "sufficient proportion".
55 His Honour then reached the following significant conclusion (at [113]):
When one takes [the results of the two samples obtained from the Vision Glass factory in June 2008] in conjunction with Dr French's evidence as to a "sufficient proportion" and, further, in conjunction with the results of testing and analysis conducted or caused to be conducted by Dr Holt in April/May 2008 tests and the known performance of the Termiglass barrier system in tens of thousands of installations over the years since 2004, it is improbable that this possibility has become as yet an actuality. That conclusion, in turn, is based on some conclusions which I have reached in relation to evidence concerning alleged breaches of the barrier system, a preference for Dr French's opinions where they differ from those of Dr Holt and Dr Ewart and also views expressed by Mr Schaffer and Mr Meadows. I detail these conclusions and the reasons for them at some length below.
56 In other words, on the whole of the evidence, his Honour concluded it was more probable than not that the Termiglass Termite Barrier System complied with the Australian Standard for size performance.
57 After rejecting Granitgard's submission about the colour and smell of Termiglass and finding that whatever contaminants present were immaterial, his Honour summarised his conclusions on this aspect (at [120]) as follows:
In short then, I find that the product manufactured by Vision Glass and supplied to the market by Termicide as Termiglass for installation into its barrier system more likely than not has been and is what it is supposed to be. The product supplied as Termiglass does conform to the product as described in the CSIRO Appraisal. It is a crushed or "sintered" (which means much the same thing) glass product which is generally (in the order of 95%) between 1.7 mm and 2.4 mm in size.
58 His Honour then turned to consider the expert scientific evidence as to whether the representations Termicide had made about Termiglass as installed were false, misleading or deceptive. His findings in this regard are quite extensive and occupy approximately one-half of his reasons for decision. Without detailing all of them, the following are significant for the purposes of this performance issue:
(a) Consistent with his conclusion (at [113]) (see [55] above), his Honour repeatedly accepted the evidence of Dr French, including where that differed with various other witnesses, including Dr Holt. He detailed Dr French's close involvement in the development of both Granitgard and Termiglass for use as a termite barrier system. He was clearly impressed with the qualifications, experience and evidence of Dr French. Indeed, he concluded that: "Dr French might be described as the father, in Australia, of particle barrier systems": see at [271].
(b) While the Australian Standard began in 1995 by referring to graded stone barriers, it was broadened in 2000 to refer to graded particle barriers: see at [158]. His Honour went on to detail how a graded particle barrier may be deemed to satisfy the requirements of the 2000 version of the Australian Standard as follows:
Section 7 in the 2000 Standard set out the "deemed to satisfy" requirements for graded stone particulars. Section 7 did not include a specific provision dealing with particle size range. Instead, cl 7.3.1 referred to the performance requirements of cl 2.3.3. In turn and in summary, sub-clauses 2.3.3(a), (b) and (c) specified that (a) the particles be termite resistant, and (b) must be graded and shaped so that they cannot be transported by foraging termites species occurring in the region; and (c) able to be placed in a manner so that the voids between particles do not permit penetration of foraging termite species occurring in the region. Clause 7.4.1 of the 2000 Standard required a minimum depth of 75 mm while cl 7.4.2 (dealing with perimeter applications) required a minimum compacted depth of 75 mm when used in wall cavity applications.
(c) In October 2003, Dr French was approached by representatives on behalf of Termicide to review and assess whether crushed glass particles would provide a satisfactory graded particle barrier under the 2000 version of the Australian Standard: see at [160]. Dr French produced a report in February 2004 to that effect.
(d) The tests conducted by Dr Ahmed, which were provided to Dr French for the purposes of his February 2004 report, were genuine and accurate: see at [173]-[183]. Since this conclusion is particularly relevant to the Exhibit 47 issue, it is appropriate to set it out in full (at [182]):
I see no reason to doubt that Dr Ahmed conducted the tests upon which he reported to Dr French for the purpose of that report. The alternative, in effect, was that Dr Ahmed either alone or in conjunction with Dr French was guilty of scientific fraud. So much was a theme in their cross examination. The evidence does not warrant the making of such a serious finding. It does not withstand objective scrutiny. Neither is it consistent with my observation of each of them in giving their oral evidence. I thought each of them was an honest and learned man. Quite why one or perhaps two of the very few scientists in Australia with relevant expertise would engage in that conduct either to assist or to deceive Termicide, especially knowing that their advice had been sought in the context of a proposal to market a glass particle physical barrier, continues to elude me.
(e) His Honour considered the results of the concurrent field tests conducted by Dr French and Dr Holt in April 2008 (see at [191]-[196]) and concluded they showed no penetration of the replicate barriers, ie Termiglass (see at [194]). Further, while there were no significant differences in the results, to the extent that any of the results were considered different, his Honour preferred Dr French's evidence: see at [195].
(f) As to the sieve analysis tests of Termiglass conducted at about the same time, his Honour also accepted Dr French's evidence that about 90% of the sample was within the requisite range and this compared favourably with the 95% figure, accepting that this was not a rigid figure. Specifically, his Honour said (at [197]):
The sieve calibration for the analysis conducted by Dr Ahmed and for Dr Holt is slightly different. Nevertheless, as Dr French observed and I find, the overall results are comparable in the sense of being consistent one with the other. Each test discloses that about 90% of the sample Termiglass was within the within the medium range of 1.7 mm - 2.4 mm. I accept as correct Dr French's opinion that the particle sizes of these Termiglass samples are appropriate for Termicide's barrier system. These results, when coupled with the absence of penetration, underscore the wisdom in Dr French's evidence, discussed above, as to 95% not being a rigid figure. They also further support the conclusions which I have reached, as set out above, concerning the consistency of production of Termiglass at the Vision Glass factory.
(g) These various test results confirmed that Termiglass as installed met the requirements of the 2000 version of the Australian Standard. His Honour summarised his conclusions in that regard as follows (at [198]):
The results of the April/May 2008 tests conducted by Dr Holt confirm the correctness of the opinion which Dr French gave to Termicide in his February 2004 report. Dr French also expressed the opinion, which I accept as the correct or preferable opinion, that these results confirm that Termiglass as installed provides an effective termite physical barrier and meets the performance requirements (cl 2.3.3) of the 2000 Standard. To summarise that opinion: by reference to those performance requirements and where necessary to construe the meaning of those requirements:
(a) Termite resistant. Termites cannot eat glass;
(b) Graded and shaped so that a sufficient portion of the particles are of a size that cannot be transported by foraging termite species occurring in the region. Termiglass mainly comprises particles within the medium range of 1.7 mm - 2.4 mm which is an effective particle size for coptotermes acinaciformis and similar termite sizes; and
(c) Able to be placed in a manner so that the voids between the particles do not permit the penetration of foraging termite species occurring in the region. It is necessary, first, to construe the meaning of this requirement. I do not construe this requirement to mean that there can be no penetration at all by termites into the barrier, but rather that it means that the barrier material does not tallow (sic) penetration through to the surface. Termiglass meets this requirement.
(h) These results were also consistent with the fact that more than 27,000 installations of Termiglass had been undertaken since 2004 without any evidence of termite penetration. In this regard, his Honour concluded (at [202]):
The results of the April/May 2008 tests are consistent with and support Termicide's evidence that, after in excess of 27,000 installations since 2004, termites have never penetrated through a Termiglass barrier. Those results and that evidence are also consistent with the separately derived expert knowledge and experience of Messrs Schaffer and Meadows in the fields of building materials and pest management. In neither of these fields were Termicide's barrier system known to them as one generally reputed to fail. Yet if it had that general repute based on industry reporting each of these gentlemen was well placed to be aware of that.
On this aspect, his Honour accepted Dr French's view and, in turn, rejected Granitgard's claim, that this outcome was explicable by the drought conditions that had subsisted in south-east Queensland in the 2004 to 2008 period: see at [225].
59 Finally, his Honour assessed the evidence of the numerous witnesses about the alleged "breaching" of the Termiglass barrier installed at the Lagoona Court property (at [240]-[251]) and concluded (at [252]):
My conclusion is that the reason why the barrier at Lagoona Court was breached was because of an installation error, particularly by leaving lagging around a pipe, not because the Termiglass in the barrier was penetrated. Termites also gained entry to the property by "bridging" at various locations. The latter though was an indication of a barrier which had to this extent worked by forcing termites into what is known as an "inspection zone" where their presence could be readily detected and treated. Evidence of post inspection surface chemical treatments is not an indication of a breach of a barrier but nothing more than standard practice in the pest management industry when the presence of termites is detected. Such treatments are not effective to neutralise such of those termites as are subterranean.