Princes Park Apartments, 52 Prince of Wales Road, London Nw5 3LN LON/00AG/HIN/2024/0001
FIRST-TIER TRIBUNAL
PROPERTY CHAMBER (RESIDENTIAL PROPERTY)
Case No LON/00AG/HIN/2024/0001
Between
Hazelwood Properties LimitedApplicant(i) Mr Iain Clarke, Principal Environmental Health Officer in the Respondent’s Private Sector Housing Team; (ii) Mr Richard Chubb, Principal Environmental Health Officer in the Respondent’s Fire Safety Joint Inspection Team; (iii) Ms Ruwani Roberts (London Borough of Camden); and (iv) Mr Bowker. (c) For the Interested Party: (i) Ms Charlotte Nayler (Solicitor); and (ii) Ms Myriam Stacey KC. 14. The Building is, at its highest point, 8 stories high, and in addition has an underground carpark. It comprises North and South Blocks, each side served by a single protected stairwell. The Building has commercial areas at lower levels, and a concierge area in the ground floor of the South Block. 15. The Building was developed by Cornwall Overseas Developments Limited (‘CODL’), a company incorporated overseas in the British Virgin Islands, in or around 2013 – 2014. On 20 June 2013, CODL entered into an agreement with the Appellant, which is also a company incorporated overseas in the British Virgin Islands, to transfer to it the freehold title in the Building “180 days after the last unit in the block has been leased or earlier by agreement”, on the payment of a £1 deposit, with a purchase price of £2,500,000.00 (apportioned £2,200,000.00 to the commercial areas, and £300,000 to the residential). Nicholas and Co solicitors acted for both parties [1004]. 16. It appears the development was completed in or around August 2014, receiving final Building Control certification on 21 August [1018]. 17. The title register shows that the transfer between CODL and the Appellant was completed on 26 November 2014 (as shown in the Proprietorship Register entry dated 4 December 2024) [1594]. The freehold was made subject to a section 106 agreement made between CODL and the Respondent on 30 September 2008 [922]. 18. The parties have agreed that the Appellant will be subject to an IN, and agreed wording in respect of most matters previously in dispute. The inspection remains relevant for the zinc standing-seam cladding and physical circumstances in which the works will take place. 19. The south, east, north and west elevations of the Building may be seen respectively in the following set of photographs (appearing in the bundle at [1530 et seq]): Picture 1 Picture 2 Picture 3 Picture 4 20. To the north of the site is Talacre Leisure Centre, accessed by a two way (now) private road (Dalby Street) that can be seen in pictures 2 and 3 wrapping around the east and north faces of building. Just out of the frame at the bottom of picture 3 is a turning area/mini-roundabout, which can mostly be seen in picture 4. The remainder of the substantial width between the North Block northwest elevation and Talacre Gardens (a public park maintained by the Respondent) is set aside for disabled parking and a pedestrian area. This area narrows to the width of around 2.5 meters where the Building becomes the South Block at the south west elevation, and thereafter narrows further so that the South Block overhangs two thirds of the remaining footpath, which is itself approximately 2.5 metres wide. At the time of the inspection, there was scaffolding up in the narrowed area towards the south elevation. We were told this was unrelated. We also observed that there was scaffolding erected to the western elevation of the North Block, as seen in picture 4 (the left-hand side of the Building). This is dealt with in more detail in paragraphs 67 and 68 below. 21. Adjoining Dalby Street along the east elevation is a 7- or 8-foot wall, behind which lies a staging area and then platform access to the raised track into next-door Kentish Town West station (picture 3). This area is controlled by Network Rail. Ms Bernadette Barker took pictures of the area behind the wall on 4 July 2024 [171] which appeared to show that Camden Town Brewery had usage of the staging area at that date. That no longer appeared to be the case when we attended. 22. The 36 South Block flats are occupied under long leases (125 years). 23. The North Block is leased for 125-year term to a private residential provider of social housing, One Housing Group Limited, by lease dated 3 September 2014 [1791]. There are 19 flats in the North Block. 24. The zinc standing seam cladding, as can be seen in picture 2, extends over a vertical section of the east elevation of the building from second floor to Penthouse level, save at Penthouse level at which it wraps around all elevations interspersed by windows/glass doors. It is said that is approximately 10% of the surface area of the building as a whole. It is not disputed that it spreads horizontally across compartment boundaries. Nor is it disputed that it constructed as follows: 1mm zinc - 18mm ply - timber battens forming a cavity – Celotex (rigid) PIR insulation – steel frame with sheathing board and mineral wool insulation fill – double layer of plasterboard. It is not disputed that there are no or inadequate cavity barriers/closers. It is no longer disputed that this creates the risk of a spread of the spread of fire, though Mr Barry suggests that it is not the risk of “rapid” spread. The dispute lies in what must be done to prove that any remediation by which the current system is retained in whole or part is adequate. Issue 1 – Paragraph 2(a) of schedule 2 25. The first issue is whether the inclusion of clause (a) of paragraph 2 of schedule 2 of the IN is wrong, because it is impossible or so hard to comply with that it renders nugatory the option to keep the whole or part of the current zinc seam cladding system. The Appellant contends that the clause ‘sets it up to fail’. Evidence 26. For the Appellant, Mr Barry gave expert evidence. 27. In summary, Mr Barry’s evidence was that compliance with clauses (b) and (c) of paragraph 2 of schedule 2 should be sufficient to demonstrate the safety of the zinc cladding system, if it is retained in whole or part. Work would be done in accordance with guidance in Approved Document B or the residential fire safety standard BS9991, using approved methods and materials. That would be sufficient to demonstrate that the system was satisfactory. 28. Mr Barry’s initial evidence was that BR135 certification is “impossible” to obtain in the context of the zinc cladding system as it would be if retained (wholly or partly). Partly this would arise because in removing parts of the zinc and removing the plywood and timber battens in order to insert sufficient cavity barriers/closers, different materials (non-combustible) materials would have to be put back into the construction to achieve building control sign-off. This would be a bespoke solution with no comparable system in existence. He stated there was nothing wrong with that in principle – many buildings built before the change in regulatory regime after the avoidable tragedy at Grenfell Tower contained such materials and there was no wholesale obligation on landlords or developers to replace them. He confirmed on this approach that the make-up behind the zinc standing seam cladding would be a ‘jigsaw puzzle’ of existing combustible and new non-combustible materials. In his view, provided that the installers of new cavity barriers complied with manufacturers’ standards and installation requirements, and the parts were certified products, that would be sufficient to achieve the required of safety of the system as a whole. 29. Mr Barry initially stated he knew of no comparable system, sufficiently similar to what would be the bespoke system put in place by the proposed retention of the whole or part of the existing cladding system, on which the Appellant could rely to obtain BR135 certification. BR135 was therefore only achievable by conducting a large-scale reconstruction of the bespoke system and submitting it to a testing station. Mr Barry’s evidence was that he is not an expert in such testing and does not know what it involves. He stated initially that the condition was “impossible” to fulfil. 30. Mr Barry later conceded that a sufficiently comparable system may exist, but that it was not his field of expertise. He also clarified that what he meant by “impossible” was that it would be so expensive to conduct the large-scale reconstruction for the testing that it would make it “pointless” to try to keep the existing system; the Appellant may as well just replace it with a new, known-compliant system. That is what the Applicant meant by being set up to fail – in effect it was being given no choice. 31. He later accepted he did not know how much it would cost to obtain BR135 certification, and that wholesale replacement with a new construction fully compliant with current building regulations guidance would also be expensive. He accepted he did not have the relevant expertise on the point, and that we had been provided with no evidence on the costs or delays of such a process. He later conceded the point further, and stated that it was not that it was not practicable for such a reconstruction to be provided and tested; rather that it was not, in his view, “reasonably practicable”. 32. It was Mr Barry’s view that, if properly constructed, such a system that retained the zinc standing seam cladding with addition of cavity barriers would pass the BR135 test, but that a test was not necessary. The risk of spread of fire would be minimised by the insertion of adequate barriers/closers, so that there was no longer a risk of the “rapid” spread of fire. He stated that taking a holistic approach, given the properties of the materials and the construction of the building, compliance with requirements (b) and (c) of paragraph 2 would be sufficient. When questioned by Mr Gee about his knowledge of BS8414 and what is the ‘acceptable’ speed of propagation of fire across a Building of this size and occupation, however, Mr Barry said he didn’t know, he was not an expert. He didn’t think that current standards should be imposed on built buildings. He maintained the view that no ‘significant’ risk would remain by adopting the course proposed. 33. Mr Barry agreed with Mr Bowker that the summary of the Consolidated Advice Note (‘CAN’) at paragraph 15.3 [1112] was accurate, and remained good advice, despite the CAN having been now replaced by the PAS9980 standard. 34. Mr Jonathan Herrick, Principal Fire Engineer gave evidence for the Respondent. 35. He explained that the BR135 test involved a constructing a model wall system 8-10 metres high which is meant to represent several floors of the building. In an opening at the bottom is inserted a wooden crib in which a fire is set. It is meant to imitate fire breaking out through the window of a flat leaving the surrounding external wall cladding system exposed to the fire. The test is run for around 60 minutes. If the wall system lasts 60 minutes (so that its structure remains for analysis), the elements of it are taken off bit-by-bit to see how they have performed individually. We have seen videos of such tests reconstructing the performance of the cladding that was on Grenfell Tower. 36. How long such a test takes to book and complete depends on the availability of the materials and the testing centre, he said. The architect’s design of what is proposed is built up in the large-scale model. He did not think that there was undue delay or difficulty in obtaining such a test. The type of organisations who usually submitted such wall systems to test were those who had done the costs-benefit analysis based on their confidence in their wall system. Those who were confident that the system would pass the test would secure certification. Those who were not, could end up paying twice. 37. Mr Herrick also described the benchmarking system, in which the Appellant could identify a system either identical, or so similar, to that proposed that only a “tiny” thing would need to be tested and inferences drawn, in lieu of a full-scale test. He was not aware if anything the same or materially the same to what was proposed had been subject to benchmarking. His evidence was that it may have been. He was also aware that there were wall systems for which there was no benchmarking. 38. Mr Herrick agreed that the aim, as outlined in Mr Clarke’s evidence, was not to make the Building ‘perfect’, and conceded that there was leeway to be allowed from full compliance with current building regulations. He agreed that it was not mandatory to remove the zinc standing seam cladding or the underlying plywood and timber battens. Provided that combustible elements were discrete and separated, fire spread would be inhibited. 39. He disagreed that addition of cavity barriers and closers would adequately mitigate the risk in the Building. Cavity barriers/closers would remediate the risk by inserting a barrier to the combustible PIR insulation but would not mitigate the risk from the combustible plywood. They would deal only with the cavity and insulation, not the whole wall system. Retention of the zinc standing seam cladding system, whether in whole or part, was conditional on compliance with (a) – (c) of paragraph 2 of schedule 2 of the IN for separate but related reasons. Condition (c) was a requirement for appropriate cavity barriers to prevent the bypassing of a fire from a flat window through the cavity to get to the combustible materials. That was about fire spread from inside to outside, and fire spread through the cavity itself. Cavity closers would only protect the edges of the cavity around the windows, however. Fire spread over the external surface of the construction was not the same type of spread. The type and fixture of the cavity barriers (requirement (b)) and appropriateness/sufficiency of them (requirement (c)) were external fire spread in the context of a cavity only, not the whole system. That was how (a) was different and why it was also required. That was the only way of being satisfied of the mitigation of risk in the whole system. 40. Mr Herrick conceded that in one way the requirements were prescriptive. However, he contended that the prescription was the outcome, and not the means of meeting it; the outcome could be achieved by whatever design the Appellant considered appropriate, provided that the performance of the system as a whole (whatever its constituent parts) was satisfactory to ameliorate the risk. The greatest concern was the retention of combustible plywood, which is a negative factor on the outside of a wall system, leading to fire on the surface of rather than in the cavity of the system. 41. Mr Herrick stated he was not a construction expert. He agreed that it seemed likely it would be very difficult to install cavity barriers/closers without first removing the zinc cladding and the plywood backing.Respondent
Before
Deputy Regional Judge Nikki CarrRegional Surveyor Helen Bowers MRICSMr Andrew Gee RIBAMr Aaron Walder (Counsel) instructed by Nicholas & Co for the Applicantinstructed by inhouse Legal Team Various Leaseholders as listed in the instructed by Mishcon de Reya Appeal in respect of an Improvement Notice – Schedule 1 of the Housing Act for the RespondentDate 9 October 2024Hearing 2024-09-27Property: of Wales Road, London Nw5 3LNType of application: 2004 Deputy Regional Judge Nikki Carr Regional Surveyor Helen Bowers
DECISION
[1]The Improvement Notice dated 19 October 2023 is confirmed.