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Flagpole Guides
Portugal

Lifespan of the flagpole and the flag

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This page is an English translation of the Portuguese original. Where the two versions differ, the Portuguese text is the original.

A well chosen and maintained flagpole can last for decades, but its moving parts and the flag have much shorter lives. How long they last depends on the material, the site and the care. In Portugal, the sea air of the coast and the islands and the strong summer sun are the factors that weigh most. This guide summarises what affects the lifespan of the pole and the flag.

Lifespan by material

MaterialMain cause of wearSensitive points
AluminiumCorrosion at joints with other metalsBase, bolts, fittings
FibreglassUltraviolet radiation on the surfaceSurface, base
Galvanised steelRust where the protection is damagedBase, welds
WoodDamp, rot and insectsBase and top

Each manufacturer’s information on surface protection and conditions of use is the most concrete guide to how long a pole lasts. The materials are compared in the guide to flagpole materials.

The site

  • Coast and islands: Sea air speeds up the corrosion of metal parts. The coastal strip, the Azores and Madeira also belong to the most demanding wind zone of the National Annex to the standard for calculating wind actions.
  • Mountains: Areas above 600 metres in altitude belong to the same wind zone, and have frost and wide temperature ranges.
  • Inland: The strong summer sun wears the halyard, the surface of fibreglass and the flag.

Short-lived parts

PartUsual life
HalyardA few years, depending on sun and wind
Snap hooksA few years; shorter by the sea
PulleyMany years, if it turns freely
FlagMonths to a few years, depending on use

Replacing these parts is part of normal maintenance. The subject is covered in the guides to flagpole maintenance and flagpole repair.

The lifespan of the flag

The flag is the part that wears out fastest. The fly, the end away from the pole, frays in the wind, and the colour fades in the sun. A flag flown every day wears much more than one flown only on Sundays and holidays, as Decreto-Lei n.º 150/87 provides for public buildings. The decree also provides for the national flag to be displayed in good condition, and according to the memorandum on flags of the Câmara Municipal do Sabugal the flag is replaced when it is torn or faded.

Guarantee and wear

Decreto-Lei n.º 84/2021 makes the seller liable for a lack of conformity that becomes apparent within three years of delivery. Normal wear caused by use and time is not, as a rule, a lack of conformity. The price of a new pole is described in the guide to buying a flagpole, and that of a flag in the guide to buying a flag.

Frequently asked questions

How long does a flagpole last?

An aluminium or fibreglass pole with regular maintenance often lasts for decades. The lifespan depends on the material, the quality of the surface protection, the exposure to wind and sea air and the care of the base. The moving parts, such as the halyard, last much less.

How long does a flag last when flown?

It depends on the fabric, the size, the wind and how long it stays up. A flag flown every day on the coast wears much faster than one flown only on Sundays and holidays. Decreto-Lei n.º 150/87 provides for the national flag to be displayed in good condition.

Does the guarantee cover wear of the flagpole?

Decreto-Lei n.º 84/2021 makes the seller liable for a lack of conformity that becomes apparent within three years of delivery. Normal wear caused by use and time is not, as a rule, a lack of conformity.

Sources

This guide is based on the following sources, most of them in Portuguese:

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