Painting and damp in Braga: 1,387 mm of rain and old-town rules
Braga gets 1,387 mm of rain a year and 113 days with 1 mm or more, at the IPMA station Braga / Merelim. Almost half of the municipality's buildings (49.1%) went up between 1981 and 2005.
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Braga's homes and their walls
The 2021 Census counts 40,214 buildings in Braga. These are whole buildings, not flats. Only 13.0% date from before 1961, against 23.2% nationally. Most are newer: 49.1% were built between 1981 and 2005, against 40.4% nationally, and 15.5% after 2005. So many wall problems here come from buildings 20 to 45 years old, not from old houses.
Out of every 100 buildings, 68.0 need no repair according to the census respondent (64.2 nationally), 21.6 need light repairs and 2.9 need deep repairs (4.6 nationally). Repair need is the respondent’s opinion, not a survey by an expert.
The historic centre is a different matter. Braga’s municipal code has a whole title for the Centro Histórico (historic centre), the Zona dos Galos and the protection zones of listed buildings. There, even the colour and type of façade render count. You can see the granite in photos of the Porta Nova arch and Rua do Souto, but we have no council data on the condition of the walls on those streets.
SourcesMunicípio de Braga, Código Regulamentar, current version (articles B-1/26, B-3, D-2/47 to D-2/53) · Município de Braga, Código Regulamentar, Part D, public space management (occupation for works) · Diário da República, Regulamento n.º 927/2025, 25 July (23rd amendment to the code), article H-1/17 · IPMA, Climate normals 1991-2020, Braga / Merelim · INE, 2021 Census, buildings by period of construction and repair need (indicator 0011482, updated 12-11-2022) · Wikimedia Commons, Arco da Porta Nova 2.jpg (Joseolgon, CC0)
The buildings of Braga
40,214 buildings counted in 2021
- 72.2% built up to 2000 (country: 82.1%)
- 13.0% built before 1961 (country: 23.1%)
- 2.9% with deep repair needs (country: 4.6%)
The vertical mark on each bar is the share for the whole country.
Source: INE (Statistics Portugal), Census 2021, indicator 0011482, updated 12/11/2022. CC BY licence. The figures are for whole buildings. An old building can be well kept and a new one can have damp. Age is a hint, not a diagnosis.
Rain, damp and cold in Braga
At the IPMA station Braga / Merelim (no. 622, altitude 68.4 m, 1991-2020 normals) it rains 1,387.3 mm a year. The wettest months are October (197.8 mm), December (190.3 mm), January (179.5 mm) and November (170.1 mm); July has 27.9 mm. There are 113.5 days a year with 1 mm of rain or more and 47.3 with 10 mm or more.
The mean annual temperature is 14.9 °C and the mean January minimum is 3.1 °C. There are 24.3 days a year with a minimum below 0 °C, 8.5 of them in January and 7.0 in December. IPMA notes that the station has data since 1999 and that the series is hybrid. The table gives no air humidity.
What this means for painting: from October to January it rains a lot and outside walls stay wet for weeks, so façade paint dries slowly in those months. From June to August less than 41 mm falls per month, and that is when the weather helps most. This reading is ours, drawn from the IPMA figures, not a manufacturer rule: check drying and recoating times on the paint’s data sheet.
Houses and walls in Braga
Recent blocks
With 49.1% of buildings built between 1981 and 2005 (2021 Census), many Braga flats are already 20 to 45 years old. At that age the usual trouble is condensation and mould in corners, ceilings and behind furniture; the cause is ventilation and water vapour, see our guide on condensation. This is a general rule, not a measurement taken in Braga.
Detached houses
Outside the centre there are many houses and low blocks from 1961 to 1990 (22.3% and 17.1% of buildings, 2021 Census). With 113 rainy days a year, outside walls, gutters and window joints are the places to check before painting. With no council data on these homes, we treat this as general guidance.
Historic centre
In the Centro Histórico, conservation works must respect the outside image: the shape, nature and colour of façade finishes (article B-3/10). Granite elements, murals and decorative stucco should be kept where possible. Paint that hides stone or tiles is a problem; always ask the council which colour is allowed before you paint.
Rules and permits in Braga
Código Regulamentar do Município de Braga (municipal code), “Versão Atual” page, read on 3 November 2026. Article B-1/26 requires written notice to the council, at least ten days ahead, of any urban operation, whether or not it needs prior control; for exempt works you attach a short description of the work, and for minor works the expected duration. Article B-3/13 says that when façade render is redone in the Centro Histórico, lime render and non-textured paint, lime or silicate, are preferred.
Scaffolding: article D-2/48 requires a licence to occupy public space during works, requested at least 15 days ahead, and article D-2/53 requires the site to be fenced with hoardings at least 2 m high. Regulamento n.º 927/2025 (article H-1/17, no. 3) says works exempt from prior control may be exempt from the scaffold and hoarding fee, for up to 18 months, but only in the cases it defines. We could not confirm whether a simple façade repaint qualifies, nor the update date of the page.
That repainting a façade with nothing else changed is exempt conservation work comes from the RJUE (article 6), which we did not reopen for this page; the text changed with Decreto-Lei 108/2026, in force since 1 October 2026. See our guide on painting a façade. For colour in the Centro Histórico, ask the council first.
Areas near Braga
Do you not live in Braga itself? These are the places around it. Each has its own page.
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General notes
At the IPMA station Braga / Merelim 1,387.3 mm falls a year, with 113.5 days of 1 mm or more (1991-2020 normals). It rains most from October to January, so outside painting is usually easier from June to August. Check drying times on the paint's data sheet.
Article B-1/26 of the municipal code requires written notice at least ten days ahead of any urban operation, even one exempt from prior control. Whether a repaint counts as one for this purpose we could not confirm: ask the private works department.
If the scaffold occupies public space, yes: article D-2/48 requires an occupation licence requested at least 15 days ahead, and D-2/53 requires hoardings. Scaffolding wholly inside your own plot does not occupy the road, but confirm with the council.
Not freely. Article B-3/10 asks conservation works to respect the colour and nature of façade finishes, and B-3/13 prefers lime render with non-textured lime or silicate paint. Ask the council which colour is allowed before buying paint.
Generally not: only 13.0% of the 40,214 buildings date from before 1961 and 49.1% from 1981 to 2005 (2021 Census, INE). These are whole buildings, not flats, and repair need is the census respondent's opinion.
Related guides
- Bedroom condensation: ventilation, heating and dehumidifiersWhat Portugal's DGS, Portaria 138-I/2021, the Swiss FOPH and DECO PROteste say about airing, heating, moving furniture and using a dehumidifier in a bedroom with condensation.7 min
- Mould on walls: causes, health and how to get rid of it for goodWhy mould appears, what the WHO and Portugal's DGS say about health, how to clean a small patch safely and why anti-mould paint is not enough.7 min
- Painting the facade: do you need a licence and the condominium's approval?Repainting a facade is maintenance work exempt from a licence, but it needs notice to the council, a co-owners' vote and a licence for street scaffolding. What we read for Lisbon and Porto.6 min
- Anti-damp and anti-mould paint: does it work? What it promises and what the sheets sayTin promises against data sheets, warranty terms and the biocides regulation: the paint can help the finish, but it does not correct the cause of the damp.7 min
- Damp walls: condensation, rising damp, rain penetration and how to tell whichThe four ways water reaches a wall, the signs of each, a step-by-step check before calling a specialist, and why painting over it does not work.7 min
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