Roofs and gutters: why we clear them before the first rains
Between August and September, Condoarade schedules and coordinates the inspection of the roofs of the buildings under its management, carried out by a partner technician: visual inspection, photographic record and mechanical cleaning of the gutters, drain outlets and drainage grilles. This is not decorative diligence — it is what separates a roof prepared for the Algarve autumn from an infiltration in October that costs fifteen times more to put right. This is the factual record of an intervention in September 2025 at a multi-family building in the Barlavento.
Why this is done in September
The Algarve does not get much rain — it rains little and badly. The Barlavento's average annual rainfall is around 500 mm, but it is concentrated in short, intense episodes between October and February, usually tied to Atlantic depressions that dump 30 to 60 mm in a few hours. A roof with blocked gutters has no capacity to drain this volume. The water builds up, spills over the flashing, seeps into the slab or the ceiling of the top floor, and what was a downpipe needing a clean becomes a waterproofing job of several hundred euros.
The right cycle is to carry out the inspection and the cleaning at the end of summer, after the driest weeks in which leaves, dust and light vegetation accumulate, and before the first autumn front. September is the operational month. Scheduling the intervention in October is too late — if the front arrives first, the blockage is discovered through the infiltration rather than through the inspection.
What is inspected, point by point
The routine is standardised and is set down in a technical report that goes into the condominium's file. Each point has a before-and-after photograph, and the prior condition is classified factually — good, fair or degraded — so that there is a time series from year to year.
- Visual inspection of the roof. General condition of the tiles, fixings, flashings and trims. A broken, displaced or missing tile is flagged. Crumbling fixing mortar on the eaves is recorded.
- Eaves gutters and channels. Condition of the sheet metal or of the bituminous waterproofing, presence of debris, vegetation, nests. Full cleaning by mechanical means.
- Drain outlets and downpipes. Inspection of the outlet opening, flow check, removal of blockages. Where there is a protective grille, dismantling for internal cleaning.
- Drainage grilles at ground level. Courtyards, car parks, ramps, surrounding areas. Debris, compacted sand, fine roots. Cleaning by dismantling.
- Other points of hydraulic risk. Galvanised channels adjacent to chimneys, extractor outlets, points where dripping from the tiles may be damaging the wall.
Why mechanical cleaning and not a water jet
The question comes up often — if it is dirty, why not wash it with a high-pressure hose? For three technical reasons. First: the high-pressure jet displaces tiles, loosens the mortar on the eaves, damages old flashings. What looks like cleaning is, in many buildings more than fifteen years old, the trigger for the next infiltration. Second: the water pushes the debris into the downpipe instead of removing it. The blockage moves but does not disappear — it sits deeper, harder to locate and more expensive to clear. Third: on a flat roof or a bituminous channel, pressurised water can compromise joints and sealants that were watertight.
The right approach is mechanical — shovel, brush, collection in a bag, and only afterwards, if warranted, washing with low-pressure water to carry away the fines. On heavily blocked gutters, the protective grille is partly dismantled, the debris is physically removed, and the grille is reassembled.
What turned up at this building
The case we are documenting today is a residential building under Condoarade management, located in one of the three anchor cities of the Barlavento. A pitched roof in ceramic tile, galvanised-sheet gutters on the two long slopes, three main downpipes, drainage grilles in the car park floor and in the access courtyard. The inspection was carried out on 5 September 2025 by a Condoarade partner technician, with a photographic record of twelve points.
The prior condition was classified as fair — there was no critical blockage, but the gutters had a significant build-up of mineral dust, light wall vegetation along the eaves, and at one of the outlets the downpipe opening showed a reduced cross-section through concretion. At two grilles on the car park floor, fine compacted debris was found that was reducing the hydraulic capacity. The intervention carried out by the partner technician comprised a full cleaning of the gutters, cleaning of the collection outlets by dismantling, physical removal of the debris and reassembly of the grilles, under Condoarade's coordination. Recorded result: 7 of 8 points compliant; zero follow-up actions opened. The building goes into autumn with free-flowing drainage.
A damp patch on the top-floor ceiling after the first rain. Almost always it is a blocked gutter or a displaced flashing. The longer it goes on, the further the infiltration migrates into the joists and the floor below.
Visible vegetation along the line of the eaves. When there are plants growing in the gutter, the blockage has been in place for at least a season. The root may be breaking through the waterproofing.
Run-off on the façade below the eaves on dry days. It indicates that there has been a recent overflow and that the wall is releasing the water it absorbed.
The sound of standing water in the downpipe. It means the outlet at floor level is blocked and the pipe is holding a volume of water. There is a risk of rupture through hydrostatic pressure in a heavy-rain episode.
How we build this into the Annual Verification Plan
Roof inspection and cleaning is one of the standardised checks that Condoarade schedules and coordinates within its Annual Verification Plan. It is not a response to an owner's complaint, nor an extraordinary expense — it is a scheduled routine, budgeted annually in the condominium's financial plan, carried out by a partner technician with a technical record in our own template. The report is filed on the condominium's platform, accessible 24 hours a day to the owners, with photographs, prior condition, intervention carried out and final condition.
The Annual Plan's operational calendar covers, beyond the roof, the preventive maintenance of electrical panels by a technician accredited by the DGEG, the common equipment (lift, pumps, HVAC where present), the fire extinguishers and detection systems, the gardens, and the drainage and water-supply infrastructure. Each check has a time window, a responsible technician, a report template, and a point of allocation in the budget.
Practical criterion. In any building over fifteen years old on the coastal Algarve, the annual inspection and cleaning of roofs and gutters is not up for debate — it is routine maintenance. The average cost per building is a fraction of the cost of a single corrective intervention for an undetected infiltration.
For condominiums in Portimão, Lagos and Lagoa
Condoarade is a Digital Condominium Administration based in Portimão. In Portimão, Lagos and Lagoa we deliver regular operational coverage directly — including the Annual Verification Plan for roofs and gutters. Our management team keeps permanent operational contact with local partners specialising in roof maintenance, all with professional civil-liability insurance and a documented track record with the firm. The annual intervention window is fixed and met — no condominium under our direct management goes into October without the inspection done.
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