Planned Preventative Maintenance (PPM) for Flat Roofs

Programme

Maintenance protects the guarantee, not just the roof

This is the part building owners are most often not told: manufacturer system guarantees generally require documented maintenance inspections as a condition of cover. The maintenance record is therefore part of the cover rather than an extra sitting alongside it. A PPM programme does two jobs at once: it keeps the roof healthy, and it produces the dated, photographed records that keep the guarantee demonstrably valid.

This is not a rule we invented to sell visits, and on one system we are bound by it ourselves. We hold approved contractor status with the maker of the liquid system we lay, so the product guarantee behind it sits in our name, and two things are attached to it by the manufacturer: the roof is looked after as its instructions set out, and damage an ordinary inspection would have caught sits outside cover. Those are the maker's terms rather than ours, and a booked visit is simply how they get met. Read across the manufacturers and the pattern holds, which is why we treat inspection records as part of the waterproofing rather than paperwork bolted on afterwards.

If you manage a portfolio, that record keeping compounds: each roof gets a documented history you can hand to insurers, auditors, buyers or a future contractor without digging through years of email.

On the day

What a visit actually includes

A maintenance visit is not a look round. It follows the same order every time, which is what makes one visit comparable with the last one.

• The inspection. Membrane surface, laps, upstands, flashings, rooflight kerbs and penetrations, each compared against how it looked on the previous visit rather than judged fresh. Change over time is the signal; a static fault and a spreading one need different answers.
• Drainage and outlet clearance. Outlets, gratings, gutters, hoppers and downpipe heads, along with the routes water takes to reach them, cleared on the spot. A blocked outlet is the cheapest defect on any roof to fix and the most expensive to leave, because the standing water it creates works on every lap and detail it touches. Gutter clearing folds into the same visit, where roofline care overlaps maintenance.
• Minor repairs on the spot. Small splits, lifted laps and tired details made good during the visit where the weather and the material allow, before water gets underneath and the job changes size. Anything beyond that is reported with what it will take, rather than started without a decision.
• The record. Findings, work carried out and anything left on the watch list, photographed and dated the same day.

Nothing on that list is discretionary. A visit that skips the drainage because the roof looked dry is the visit that costs you the following winter, and what the autumn round is actually racing is set out in the autumn checks that prevent it.

The parts of a roof a schedule keeps out of trouble

Some things on a building fail slowly and cheaply until the year nobody looks at them, and then fail expensively. Those are what a rota is really for. A rooflight kerb loses its seal long before it drips. Terraces and podium decks hide their fault under whatever people walk on, so an annual look at the outlets and the perimeter is worth more there than anywhere else, and balcony thresholds are the single detail most likely to put water into the flat below. On older stock the covering itself sets the interval: asphalt stiffens with age and wants its junctions watched, while single ply and EPDM are watched at the welds and the fixings instead.

Where a visit finds something a maintenance schedule cannot absorb, the record says so plainly. Weather damage gets its own dated write-up for insurance purposes, and a deck that has gone soft underfoot is a structural finding rather than a maintenance item, priced separately and never quietly absorbed into a programme it does not belong in.

Records

What the condition report looks like, and why it travels

Each visit produces a short condition report per roof: the date, who attended, what was inspected, pictures of anything that has changed, the work carried out, and a watch list for the next visit. It is a lighter document than a full roof condition survey, because its job is to record change rather than establish a baseline. It is written in plain English on purpose, because the person who needs it most is rarely a roofer.

That is what makes it forwardable. A managing agent can put it in front of a board without translating it, an owner can hand the series to an insurer or an assessor as the history of how the roof was looked after, and an auditor can follow the sequence without phoning anyone. Kept together, the visits stop being events and become a documented life of the roof: what it was like at the start, what has moved since, and what was done about it each time.

The same file answers the guarantee question. Our guide to roof guarantees and annual inspections walks through how a claim is argued with records and without them.

At scale

How a programme is scoped across a portfolio

Portfolios tend to be borough-shaped, so programmes usually are too. A run of estate roofs around Catford and Downham, blocks through Stockwell and Kennington, or buildings scattered across the Carshalton and Wallington suburbs can share one visit schedule and one set of records rather than three. The same holds for a cluster of mansion blocks in one town centre, which is what a programme in Wimbledon usually looks like.

It starts with a condition survey of each roof, because a programme built on assumptions inherits them. The survey gives every roof a recorded starting point, and from there the scoping is mostly arithmetic and honesty:

• Frequency per roof, not per portfolio. A young roof in good order and a tired one over occupied flats do not need the same attention. Guidance commonly lands on at least an annual inspection, with a second visit where the roof, its use or its guarantee terms call for one.
• Season, on purpose. Visits are placed so that clearance happens ahead of the autumn drop and the first storms, and so that findings can be acted on while the diary still has room.
• Runs, not single trips. Roofs close to each other are visited in the same run. It is faster for us and simpler for you, and it means access can be arranged once for several buildings.
• Priced roof by roof. Each roof carries its own figure, the portfolio total is the sum of them rather than a rate per building, and the whole programme is written down before anything is agreed.

Aftercare

What happens after we finish your roof?

Every roof we complete is offered a repeating inspection afterwards. It is not automatic and it is not folded into the price of the work: it is a separate arrangement, put to you at handover, to take or decline.

How often it should happen is worked out for that roof rather than fixed in advance. The covering, whatever grows or stands around it, the way the roof is reached and what the manufacturer's guarantee terms expect all pull the interval one way or the other. A roof under trees fills its outlets several times a season; an open deck on a clear site does not. Printing one interval for both would be inventing a number.

The visit is quoted the same way, by the size of the roof and how hard it is to get on to. A single rate everywhere would be wrong in both directions, too much for a garage and not enough for a podium deck.

• Inside the visit fee. An inspection with a photographed report; outlets and gutters cleared; leaves and loose debris taken off. An outlet takes minutes to clear and a blocked one is where slow, expensive failures begin, so it belongs in the fee rather than on a separate invoice.
• Quoted on its own. Any repair needing more than a few minutes on the spot; clearing up after a storm; damage caused by other trades or third parties; and replacing anything following an insurable event. Each gets a written figure before it is carried out.

The first inspection carries a fee like every one after it. It is not included in the price of the roof, and reading that here is better than meeting it on an invoice a year later.

On a roof we have waterproofed in the liquid system, the visit does a second job at no extra cost: it satisfies the upkeep terms attached to the product guarantee we hold, and the dated report is the proof that they were satisfied. Our guide to guarantee conditions and record keeping goes through how that works and what counts as a record.

The process

What happens between visits

Roofs do not wait for the diary. Anything that goes wrong between visits is reported like any other leak and dealt with as a flat roof repair, with what was found and what was done added to the same record so the history stays in one place.

Two honest limits belong here. A programme is maintenance, not insurance: storm damage, failure caused by other trades working on the roof, and defects a survey has already flagged as beyond maintenance are priced as work in their own right, not absorbed into the visit fee. And a programme cannot rescue a roof that is already finished; if the survey says the covering is spent, the honest route is refurbishment or replacement first and a programme afterwards.