Metal roof without interior ceiling or condensation protection

Zippi · 31 Oct 2023 at 6:01 PM

I have a metal roof built on my flat roof in the early 1990s.

There is no subroof or condensation protection, is it then built according to current building regulations?
Or is it a botched job?

Can I do something now after 30 years, do builders have any responsibility left?

fribygg · 31 Oct 2023 at 6:03 PM

Is it a condensation issue or why are you asking?

Zippi · 31 Oct 2023 at 6:17 PM

F fribygg said:
Is it a condensation problem or why are you asking?

Yes, condensation

jonaserik · 31 Oct 2023 at 6:30 PM

More ventilation so that any moisture is expelled and does not condense on the underside of the sheet.

fribygg · 31 Oct 2023 at 6:32 PM

Z Zippi said:
Yes condensation

Does it cause problems and rot or is it just temporary during certain weather conditions?

If it's a residential house, I would definitely want to have boarding and felt under the metal, but for a carport or woodshed, I wouldn't think it's wrong to build simpler and just use metal.

Jonatan79 · 31 Oct 2023 at 6:34 PM

Z Zippi said:
I have a sheet metal roof built on my flat roof in the early 1990s.

There is no sub-roof or condensation protection, is it built according to current building regulations or is it a botched construction?

What did your surveyor say when you bought the property?

Zippi · 31 Oct 2023 at 6:41 PM

Jonatan79 said:
What did your surveyor say when you bought the property?

The house is from 1970 with a flat roof.
The extension was done during the 1990s, I don't know, it was my mother who ordered the job from a local craftsman.

Zippi · 31 Oct 2023 at 6:41 PM

F fribygg said:
Does it create problems and rot or is it just temporary in certain weather conditions?

If it's about a residential house, I would definitely want to have tongued-and-grooved boards and tar paper under the sheet metal, but on a carport or woodshed, I wouldn't think it's wrong to build simpler and just use sheet metal.

It's on residential houses.

Jonatan79 · 31 Oct 2023 at 6:44 PM

Z Zippi said:
The house is from 1970 with a flat roof.
The extension was done in the 1990s, I don't know it was my mother who ordered the work from a local craftsman.

Oh well, unfortunately impossible to get a construction company to fix a faulty job now. (was it faulty 30 years ago?)

Zippi · 31 Oct 2023 at 6:45 PM

Jonatan79 said:
Oh well, unfortunately impossible to get a construction company to fix a faulty job now. (was it wrong 30 years ago?)

According to the roofer and carpenter who were here today on another matter, it's straight through a jerry-built construction.

Jonatan79 · 31 Oct 2023 at 6:46 PM

Z Zippi said:
According to the tin roofers and carpenters who were here today for another matter, it is straight through a botched construction.

Yes, that may be the case, but your mother should have made a complaint about that about 30 years ago!

Zippi · 31 Oct 2023 at 6:50 PM

Jonatan79 said:
Yes, that might be the case, but your mother should have complained about it around 30 years ago!

She trusted the carpenter.

fribygg · 31 Oct 2023 at 6:51 PM

Z Zippi said:
According to the sheet metal workers and carpenters who were here today on other business, it's a complete botch job.

If it has lasted 30 years, it's not that bad after all.
If you decide to redo it, I hope you invest properly in 1-inch raw boards and proper underlay paper under a new standing seam metal roof; this should give you more than 30 years of worry-free homeownership if you just keep the roof clean and touch up any rust.

Zippi · 31 Oct 2023 at 8:42 PM

F fribygg said:
If it has lasted 30 years, it's not so bad after all.
If you choose to redo it, I hope you invest properly with 1-inch tongue and groove boards and good quality underlayer felt under a new standing seam metal roof; it should give you more than 30 years of problem-free homeownership as long as you keep the roof clean and touch up any possible rust.

The problem now is also that it is leaking through the screws that are too tightly fastened, and near the chimney, water is seeping in; there's so much water on the old roof. At one vent, water has seeped in, and the wood in the construction holding the roof has rotted, so much carelessness.

Unpleasant to know that it’s leaking so much.

The person who did the roof was in the attic 2 months ago and noted that it was dry and in good condition...

I think the roofer considered felt instead of metal; what do you think about that?

fribygg · 31 Oct 2023 at 8:45 PM

Z Zippi said:
The problem now is that it's leaking through the screws that are tightened too much, and at the chimney, it's leaking, so much water on the old roof. At some roof vent, water has come in, and the wood in the construction holding the roof has rotted, so much negligence.

Unpleasant to know that it's leaking so much.

The person who did the roof was in the attic 2 months ago and stated that it was dry and nice...

I think the roofer was considering felt instead of metal, what do you think about that?

I think only felt is too risky for a residential house, install a proper seam-covered roof with new vents. If you have a lot of water on the roof, I'm also wondering if the roof has sufficient slope?