Maintenance split with other freeholders

[Carl OConnell]

In our building, there are 5 flats and we manage our own freehold between the 5 owners, we all have leasehold contracts which include an agreed split on building maintenance based on size of flat. As mine is the biggest, I pay more (23% as opposed to 19%/19%/20%). We are looking at a new intercom system which constitutes one new intercom unit per flat, I argued this should be a straight split 20% each - I only have one door and intercom like all the other flats. The units are in each flat so not in the common areas and is not affected by the size of the flat. The other freeholders have argued that we should split according to the percentage rule as it is part of building maintenance . Who is right?