Do Roof Tiles Become Porous Over Time?

If you have an older roof and have started noticing problems with moisture or leaks, then you may be wondering: ‘do roof tiles become porous over time?’. In this blog, we’ll be talking about porous tiles and the other factors that could be allowing moisture to enter your property.

What is meant by ‘porous’ tiles?

Porous refers to when tiles are permeable by water, rather than the water draining off or evaporating. This means that a porous material on a roof cannot do its job of keeping moisture out of the home.

It is unlikely you have had porous tiles installed on your roof, as they would not be fit for purpose as roof tiles. It is possible to find floor tiles that are porous, especially natural stone products that haven’t been sealed, but these should only be used in low-humidity settings where there is little risk of moisture.

Do tiles become porous over time?

All roofing materials have a lifespan and, as they age, certain materials may fade, become brittle, or their weatherproofing properties may deteriorate.

However, concrete and terracotta tiles do not become porous over time – in fact, concrete tiles seem to become more resilient over time, as they harden in the sun. Some very cheap tiles may be porous if they have not been sealed properly and these should not be used on your roof.

Even if a roofing material was porous, all roofs are pitched to some degree so they should be able to drain the water off before the tiles can absorb it.

If tiles aren’t porous, what else could be causing moisture and leaks?

While ceramic and concrete tiles aren’t porous, they may still deteriorate as they get older, and if they crack, warp or any tiles become displaced, then the seal of your roof is no longer watertight and a leak is possible. These same problems can occur with other parts of your roof, such as the flashing.

If you notice any of these problems but your roof is still fairly new, then it could be a sign that your roof was not properly installed in the first place and the problem could be with the tiles, the underlay, the fascia or the flashing.

How do you make sure your roof isn’t porous?

Even though tiles themselves aren’t porous, a tiled roof may still allow water to ingress if it has not been laid correctly and moisture is allowed to enter either between or underneath the tiles.

If you are having a new roof installed, make sure you choose a high-quality roofing company that will ensure your new roof has the best quality tiles that will have the longest lifespan and the best weather resistance for your climate.

If you are having trouble with moisture or a leak, a professional roofer can also inspect your current roof for any weaknesses that are allowing water to enter the property and advise whether it can be repaired, or whether a full replacement is necessary.

If you are looking to have your roof replaced, repaired or just inspected, please get in touch with us and see how we can help.


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