- 3.57 M
- buildings in Portugal’s housing stock, 2021 Census
- 50.2%
- built up to 1980
- 72.9%
- cited comfort as a reason for renovation in the UCI study
A good renovation starts with diagnosis, not demolition.
Renovation is not just replacing what you can see
Portugal has a large housing stock that is several decades old. The 2021 Census counted around 3.57 million residential buildings. Almost half, 49.8%, had been built after 1980, meaning roughly half of the stock was older than that. Only 3.1% had been built between 2011 and 2021.
That helps explain why renovation is such an important part of construction today. A 30-, 40- or 60-year-old home should not be assessed only by appearance. Behind a wall there may be ageing services. Beneath a floor there may be an unsuitable substrate. A small stain may be caused by something far from the place where it becomes visible.
“It is only a stain.” Maybe.
Before repainting, it matters to understand where it comes from. Rising damp, external water ingress, condensation or a leaking service can create visually similar symptoms while requiring completely different solutions.
Repainting may improve the appearance temporarily. It does not necessarily solve the cause. The same applies to cracks. A crack should not be judged only by whether it looks “large” or “small”. Its location, direction, evolution and construction context all matter.
In older buildings, LNEC also identifies the presence of water and soluble salts as a frequent cause of degradation in porous materials such as stone, ceramic products and mortars.
What about standing water on a terrace?
If water remains on an exterior surface, simply replacing the finish may solve nothing. The cause may lie in the falls, drainage points, build-up beneath the finish or waterproofing.
This is exactly the difference between treating a symptom and solving a cause.
Why do people renovate?
In a UCI/Spirituc study of people who had carried out home improvement works, 72.9% cited comfort as one of the main motivations, while 65.6% mentioned improving conditions and renewing the space. Solving structural problems was cited by 31.1%.
In other words, renovation is not only aesthetic. In many cases, the expectation is that the home will work better. That requires looking at what does not appear in an “after” photograph.
Before demolition, answer a few questions
What is structural? Which services should be replaced? Are there moisture problems? How does the home perform thermally? What can be retained? Which decisions affect one another?
Only then does it make sense to focus on finishes. A good renovation does not necessarily mean replacing everything. It means knowing what to keep, what to correct and what genuinely needs replacement.
