What caused this corrosion on three year old tin

massey265

I put up a new three bay closed in shed three years ago, for machinery and have a dry pen for ten weanlings I house for a few months in winter, would they cause this corrosion on the outside off the tin, under the paint and it's turning white, it's only on one side off shed opposite cattle pen, I can't load photos off it for some reason.

Base price

Condensation?
What is the ventilation like in the shed?

massey265

Ventilation wouldn't be the greatest so I tend to leave back door open and half off Front, just afraid it's cattle causing it wouldn't house them in it if they are.

Base price

Have you got ventilation under the roof/top of the walls that allows a through flow of air.

bullnuts

massey265 wrote: »

Ventilation wouldn't be the greatest so I tend to leave back door open and half off Front, just afraid it's cattle causing it wouldn't house them in it if they are.

Its amonia ! Would you smell piss walking in when the cattle are there?

massey265

bullnuts wrote:

Its amonia ! Would you smell piss walking in when the cattle are there?

Would only have holes for vents in wall around the pen, no wouldn't smell piss when I walk in but there is bound to be some evaporation alright from the bedding, that would affect the outside off the tin tho?

Miname

are the sheets down on treated timbers? with no felt in between, whatever reaction between cattle treated timber and sheeting it starts to rot the sheets, hence the reason all grant aided sheds have dpc between.

Bass Reeves

Massey from your first post you seem to suggest that the corrosin is on the outside of the sheeting. I supect that quality of the sheeting is the issue. turning white sounds like electrolysis. this is a reaction between two metals caused by an electrical chemical reaction. It is what makes battery's work. Is there any other metal material present. Did the sheeting comre in contact with acid/alkali before or after erecting.

massey265

Miname wrote: »

are the sheets down on treated timbers? with no felt in between, whatever reaction between cattle treated timber and sheeting it starts to rot the sheets, hence the reason all grant aided sheds have dpc between.

no where the corrosion is, the tin is on galv steel purlins.

Bass reeves yes the corrosion is on outside off tin coming thru the paint from the gutter down, only on the sheltered side off the shed,shed was erected by a suppler/manufacturer so I cant say has it been I contact with what you mentioned. got a picture uploaded which will explain it better.

Never wrestle with pigs

Sounds like bad tin, I'd be getting him back to have a look.

whelan2

massey265 wrote: »

no where the corrosion is, the tin is on galv steel purlins.

Bass reeves yes the corrosion is on outside off tin coming thru the paint from the gutter down, only on the sheltered side off the shed,shed was erected by a suppler/manufacturer so I cant say has it been I contact with what you mentioned. got a picture uploaded which will explain it better.

Do you know were he sourced the sheeting from? I did hear a couple of years ago a cowboy supplier was selling sheeting that wasnt what it said on the tin. We said at the time there would be trouble in a few years

massey265

Yeah I know were he bought the tin, if I show him it am sure he will blame the housing off the cattle for causing it, but it shouldn't effect the out side off the tin would it.

milkprofit

massey265 wrote: »

Yeah I know were he bought the tin, if I show him it am sure he will blame the housing off the cattle for causing it, but it shouldn't effect the out side off the tin would it.

The cattle should not cause corrosion on out side
Saying that u need to open vent in top eg raise sheets or space some of them
Is there a quality stamp on sheet if not it is dirt

whelan2

milkprofit wrote: »

The cattle should not cause corrosion on out side
Saying that u need to open vent in top eg raise sheets or space some of them
Is there a quality stamp on sheet if not it is dirt

Quality stamp stands for nothing with some of the suppliers. Don't know what come back there could be as the guy I know is gone out of business

Grueller

whelan2 wrote: »

Quality stamp stands for nothing with some of the suppliers. Don't know what come back there could be as the guy I know is gone out of business

Son of an established roofing supplier?

milkprofit

Grueller wrote: »

Son of an established roofing supplier?

If it is stamped go after the manfacyuer

milkprofit

Grueller wrote: »

Son of an established roofing supplier?

If it is stamped go after the manfactuer

blue5000

Could be salt, are you far from the sea?

massey265

blue5000 wrote:

Could be salt, are you far from the sea?

I would be two miles from sea, never had bother wit sea air before.

Bass Reeves

blue5000 wrote: »

Could be salt, are you far from the sea?

This should not be the issue after two years. I really be getting onto the supplier/erector and be putting pressure on him over it. Two years even for sheeting that is not stamped is very short time for a corrosin issue. As well seeing as how corrosion is on the outside I suspect an issue with the sheeting