this post was submitted on 06 Jun 2026
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This goes for the corrugated sheets as well. Normal terracotta roofs don't have this much moss/lichens.

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[–] Dragonfruit@lemmy.blahaj.zone 37 points 1 day ago (3 children)

Do you mean asphalt? I have asphalt shingles on my house and they grow a lot of moss. If you really mean asbestos please postpone wondering about this and remove the asbestos from your roof as soon as possible

[–] False@lemmy.world 4 points 3 hours ago (1 children)

Asbestos is fine as long as you're not inhaling it. The dangerous part would be removing/replacing it because it can kick up a lot of particles in the air. If you just leave it sitting there it should be fine.

[–] criss_cross@lemmy.world 2 points 2 hours ago

You just need to make sure it’s intact too. Once it’s starts fraying then it’s an issue.

[–] SubArcticTundra@lemmy.ml 13 points 21 hours ago (1 children)

It's not my roof fortunately but these asbestos shingles were used everywhere in Czechia and replacing so many roofs at once would be astronomically expensive. So people just leave them up until they start deteriorating (then they get removed by specialists). Fortunately thay're pretty safe for most of their lifetime unless you break tgem or they start falling apart.

[–] WhyJiffie@sh.itjust.works 2 points 8 hours ago (1 children)

Fortunately thay're pretty safe for most of their lifetime unless you break tgem or they start falling apart.

what about the hailstorm?

[–] ChaoticNeutralCzech@feddit.org 2 points 2 hours ago

It usually also rains during hailstorms, which helps clean up airborne particles

[–] adb@lemmy.ml 19 points 1 day ago (2 children)

Yea asbestos is no joke, however not every material containing asbestos is an immediate and incredibly dangerous health hazard (provided it’s just sitting there).

Some materials (like the asbestos equivalent of rockwool) continuously release asbestos particles in the air. That is indeed incredibly bad and dangerous and need to be removed asap. Other materials won’t release anything unless you are cutting them or drilling holes in them (and thus releasing particles) or if they are in an advanced state of decay (and thus releasing particles). These normally don’t constitute a health hazard but my understanding is that under certain conditions or given enough time that can change.

This might be the case here. If it was my home I’d definitely get a professional opinion sooner rather than later. Especially since asbestos could also have been used elsewhere in the house, in materials or places that pose a bigger threat to the occupants than the roof cover.

[–] Zwuzelmaus@feddit.org 9 points 1 day ago (1 children)

Other materials won’t release anything unless you are cutting them or drilling holes in them (and thus releasing particles)

Or some shingles eventually break...

If one shingle breaks yeah you wouldn't want to huff it, but realistically dilution would mean the tiny amount released is next to harmless. Asbestos is an extreme occupational hazard for people unlucky enough to have worked with it, but for most extant asbestos material the best practice is to leave in place.

[–] 11111one11111@lemmy.world -2 points 1 day ago

not every material containing asbestos is an immediate and incredibly dangerous health hazard (provided it’s just sitting there).

Ill 1 up ya, asbestos is in almost everything you come in contact with on a daily baises. Home built between 1800's and 1980? Asbestos in everything. Car parts = asbestos. Basically anything being made not to burn, has used or still uses asbestos. Its drastically less dangerous than what most people like to believe. Left alone, its fuckin harmless and will be hamless for as long as its left be. So dont freak out thinking you need to replace all your insulation in your old farm house cuz you prolly creating a problem that never wouldve became a problem.

The only real live person I ever knew to get mesothelioma was my grandfather who worked as a plasterer his whole life. They used to spray the shit with their stucko, mask-less, with cigs hanging out their mouth. He got it in his 80's and lived a very long very full life. Its one if the silliest things people choose to worry about.

[–] glasratz@feddit.org 11 points 22 hours ago (1 children)

We have a terracotta roof that has similar amounts of moss, it's about 45 years old. Most Eternit roofs are even older, so it's no wonder there's moss on it. Plus, many terracotta roofs are glazed and have a much smoother surface.

[–] SubArcticTundra@lemmy.ml 8 points 21 hours ago

many terracotta roofs are glazed and have a much smoother surface.

Ah, that might very well be it. You're right, ethernit does seem to have a rough surface, which would make it a much easier surface for moss and lichens to grow on.

[–] Vinylraupe@lemmy.zip 15 points 1 day ago

Its called Eternit and it contains asbestos. Unlike terracotta it has a somewhat rough surface where water and biomass can get stuck.

Also terracotta tiles are often glazed.

[–] sem@piefed.blahaj.zone 7 points 1 day ago (3 children)

How do you know it is asbestos?

[–] SubArcticTundra@lemmy.ml 5 points 21 hours ago

Almost all of these diagonal shingles here in Czechia were made with asbestos

[–] kibblebits@quokk.au 4 points 1 day ago

Probably the lung cancer.