PVC window installation in Vila Franca de Xira
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- Town
- Vila Franca de Xira
- District
- Lisboa
- Position
- 38°57′ N · 8°59′ W
- Tilt and turn: opens to the side and tilts for fresh air.
What will it cost? Start with the sizes
Window type
Material
Colour
Sizes
Between 600 and 1800 mm
Between 300 and 2200 mm
A rough size is fine.
Extras
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About Vila Franca de Xira
Vila Franca de Xira lies in the Ribatejo, on the north bank of the Tagus estuary, north-east of Lisbon. The municipality covers 318 km² and has 137,529 inhabitants (2021), and the town 16,337. It borders Alenquer and Azambuja to the north, Benavente to the east, Loures to the south-west and Arruda dos Vinhos to the north-west.
It has six parishes: Alhandra, São João dos Montes and Calhandriz; Alverca do Ribatejo and Sobralinho; Castanheira do Ribatejo and Cachoeiras; Póvoa de Santa Iria and Forte da Casa; Vialonga; and Vila Franca de Xira. Until the mid-19th century there were four councils, Povos, Alverca, Alhandra and Vila Franca, which joined in 1855.
The relationship with the river is old and visible. There is a linear park along the estuary and old quays, such as those of Alhandra and Póvoa de Santa Iria. Nearby are also the Lines of Torres forts, at Forte da Casa. Vila Franca de Xira became a city in 1984.
The Colete Encarnado festivities, on the first weekend of July and the first week of October, mark the calendar. The Neo-Realism Museum recalls the writer Alves Redol, from the municipality. Among riverside towns, open plain and apartment districts, a window has to cope with damp river air.
What the climate of Vila Franca de Xira asks of windows
English Wikipedia says Vila Franca de Xira has a Mediterranean climate, with hot, dry summers and mild, rainy winters. The Portuguese version gives no more detail. By the Tagus and away from the open sea, estuary air can bring damp and fog on colder mornings and nights, and the open plain gives little shade in summer. There are no figures for the municipality: the general climate of the Lisbon and Ribatejo region applies.
Vila Franca de Xira sits by the Tagus, on open ground. The river brings damp air and, on cold days, fog.
There is no strong salt as on the coast, but there is a lot of damp. The drawing shows a house by the river.
- Plain wind
The Tagus valley is open and flat, and air runs along the river with few barriers. Where there are few trees and few buildings, the wind reaches windows and pushes rain against gaps. On town streets, among houses, the effect is weaker.
- Damp estuary air
By the river, the riverside park and the old quays of Alhandra and Póvoa de Santa Iria, the air is heavy with damp, more than with salt. In the morning the glass is wet. Weak metals and hardware can stain, and untreated wood swells.
- Cold and water on the glass
On winter nights, near the river, a cold frame makes the damp air in the home condense. In old town houses, with thick walls and old windows, this is stronger. A window that insulates well helps, but the air in the home has to be renewed every day.
- Plain sun
On open ground there is little shade. In summer south- and west-facing rooms heat up a lot, and the house keeps that heat until night. Outside blinds and glass with a solar coating stop the sun before it comes in.
| Condition | Level | Climate sheet |
|---|---|---|
| Summer | High | Hot, on open ground with little shade. |
| Winter | Medium | Cool; colder nights near the river. |
| Rain | Medium | More in autumn and winter. |
| Wind | Medium | Runs along the river valley. |
| Humidity | High | Damp air by the river and the quays. |
| Sun | High | Plenty of sun, especially in summer. |
Levels for comparison, not measurements.
Climate zone of Vila Franca de Xira
Portugal's building energy rules put every place in a winter zone (I1 to I3) and a summer zone (V1 to V3). In Vila Franca de Xira the zone depends on the altitude of the building, so we show the ranges.
| Building altitude | Winter zone | Maximum Uw, W/(m²·°C) |
|---|---|---|
| up to 243 m | I1 | 2.80 |
| from 244 to 537 m | I2 | 2.40 |
| above 538 m | I3 | 2.20 |
Summer zone: V3: up to 78 m; V2: from 79 to 278 m; V1: above 279 m
Maximum solar factor of windows (gtot,máx): up to 78 m, V3: 0.10 in weak-inertia spaces and 0.50 in medium or strong inertia spaces; from 79 to 278 m, V2: 0.10 in weak-inertia spaces and 0.56 in medium or strong inertia spaces; above 279 m, V1: 0.15 in weak-inertia spaces and 0.56 in medium or strong inertia spaces. The value is for the opening with the solar protection fully activated. North-facing windows are exempt. What is the solar factor?
The maximum Uw applies to windows in housing in new and renovated buildings (Portaria n.º 138-I/2021), with exceptions, for example conservation works. The zone is calculated with the Manual SCE method, from the region (NUTS III) and the altitude, not by parish. Ask the designer or an SCE expert to confirm the one for your building. Checked on 19 October 2026. What is Uw?
Solutions table for Vila Franca de Xira
| Window | Glass | |||
|---|---|---|---|---|
| Local condition | PVC | Aluminium | Double glazing | Triple glazing |
Plain wind | SuitableGood. The wind is moderate, so a well-done installation is enough. | SuitableHolds up well. Check the seals at the corners. | SuitableWind matters little when choosing the glass. | It dependsOnly worth it if the rest of the window is good. Ask. |
Damp estuary air | SuitableThe frame does not rust. A good choice near the water. | It dependsFine with a good finish. Clean it now and then. | SuitableGlass copes well with estuary air. | SuitableSame as double glazing on this point. |
Cold and water on the glass | SuitableGood against cold and damp near the water. | Needs careFine with a thermal break. Without one, condensation may appear. | SuitableGreatly reduces water on the glass, if you air the home. | It dependsCosts more. Makes sense in cold, north-facing rooms. |
Plain sun | SuitableGood. Light colours heat up less in the sun. | It dependsDepends on colour and thermal break. Dark heats up more. | It dependsFor heat there are solar-coated glasses. Ask. | It dependsOn open plain without shade it may pay off. Ask about solar coating. |
- Suitable
- Needs care
- It depends
Near the river, the installer should look at ventilation and condensation. The rest is confirmed on site.
Homes in Vila Franca de Xira
The homes in the area change what is worth asking of the windows.
Historic centre
Vila Franca de Xira, Alhandra and Povos have old streets and houses near the river. Thick walls and old windows need a careful edge finish, and facades may have rules. Ask Vila Franca de Xira town council before requesting quotes.
New apartments
In Alverca, Póvoa de Santa Iria and Vialonga there are many apartment blocks, in the more urban towns. There the sun on the facades, noise and damp estuary air weigh more than wind.
Detached and semi-detached houses
In areas further from the river, such as São João dos Montes or Calhandriz, there are houses and estates with land. More wall is out in the open and there is less shade. The windows of such homes need good seals and a solid latch.
How it works
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We do not make or fit windows. We pass your request on and explain.
Towns near Vila Franca de Xira
Do not live right in Vila Franca de Xira? These are the neighbouring municipalities and two areas of the municipality.
Cannot find your area? Write it in the request.
Quays, riverside park and old towns
According to Wikipedia, the municipality has a riverfront with a linear park and old quays, such as those of Alhandra and Póvoa de Santa Iria. People living nearby feel the river every day: the air in the morning and at night is damper, and windows suffer for it. Choose a frame that does not rot and hardware that resists damp, and air in short, frequent bursts. In homes by the quay, ask the installer to check the edge between the window and the wall, where water usually gets in. After the job, check whether damp marks appear at the corners of the window after the first winter.
Colete Encarnado and old streets
The Colete Encarnado festivities, in July and October, fill the town with people. The old part of Vila Franca de Xira may have narrow streets, and a window job on the first floor of an old street calls for agreeing the unloading and access. Tell the installer what the street is like and whether there are festival days when traffic is closed. In an old house, walls and openings are not straight, so measurements are taken on site. If the job falls on a festival day, agree the date well in advance.
General notes
PVC copes well with damp, because it does not rot. Hardware and aluminium deserve a quality finish. The most important thing is to air the home in the morning, to avoid water on the glass. Near the quay, the edge with the wall should also be checked.
It is cool, with colder nights by the river, and the general climate is mild and rainy. A window that insulates well reduces cold and condensation. In old houses, treat the wall and the shutter box too. Most homes do not need triple glazing.
On old streets there may be facade rules. Ask the town council and, if it is a development, the administration. The installer should measure the openings on site, because in old houses they are rarely straight. Only then ask for quotes.
Outside blinds or shutters hold back the heat before the glass. Glass with a solar coating also helps, and a light colour on the frame heats up less. Ask how much light the glass cuts, so as not to darken the room.
It is almost always a gap in the seal or the edge finish. A well-sealed window ends the whistle. Ask the installer to check the latch and the rubber seals. If the window is recent, they should adjust it again.
Yes. Give your parish in the request, and say whether the house is near the river or further inland. JanelaCerta does not install windows: it passes the request to installers in the area.
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