Jura limestone appears to be rusting over time

[Ajax123]

Could easily be rust. jurassic limestone is often accompanied by iron oolite (oolitic limestone) which is yonger. If your limestone come from the top part of the limestone layer it could contain varying degrees of iron content which will over a period oxidise forming "rust" spots. It does depend n whereit came from and the local geologyat the source.

 

[mreeves]

Picture 18 has tiling on the wall and a section of exposed marmox with no washers on the screws if they did not use the washers the boards will not hold the stone to the wall so you will need to make absolutely sure this was done IMO they should be glued and screwed with washers.

It would not surprise me one bit if the problem you have raised is prevalent throughout the bathrooms but that exposed section is not tiled - there is piece of back painted glass on there now. Can't seem to find any photos of half tiled walls at the moment.

 

[Mike Mike]

Untitled | Flickr - Photo Sharing!
Untitled | Flickr - Photo Sharing!

Deano, your nickname is going to have to be Hawkeye from now on.

I can't see the word Marmox on those boards by the way...

Out of interest, you use Marmox a lot, do you not ever just affix it to the wall with flexible adhesive, do you always screw it as well? Secondly, do you tank it in wet areas, and if so, what with (I'm especially curious about how you go over the screws and those GIGANTIC washers).

 

[The D]

start a new thread m8 on tanking

 

[Tony73]

its in the stone (rusty spots), and i think 2 coats of stain stop is more than enough . Jura does not take in much stain stop

 

[mreeves]

its in the stone (rusty spots), and i think 2 coats of stain stop is more than enough . Jura does not take in much stain stop

I agree its in the stone but there are more of these rusty spots appearing over time so keen to do something if possible to stop it happening further.

 

[Tony73]

i would leave them tiles alone if i was you, its nature mate

 

[Ajax123]

I agree its in the stone but there are more of these rusty spots appearing over time so keen to do something if possible to stop it happening further.

Im not sure there is anythingo be doe. Oxidation is a natural process.

 

[The D]

You could embrace it and love it your stone is beautiful rust spots and all.

 

[DHTiling]

It is mineral content within the stone, very common with this type .. i have just laid 155 mtrs of the beige version and it was the same... i like it really , adds character.

 

[swanman]

With limestone you need at least 5/6 coats of sealer then a wax top coat

 

[swanman]

Good answer deanotile you should love your stone warts and all

 

[DHTiling]

With limestone you need at least 5/6 coats of sealer then a wax top coat

Can i ask why that is required..? just out of interest.

 

[Topshop]

Why do I need to keep saying it - no wax on natural stone!!!!! Stone needs to breathe.

 

[Pebbs]

If you waxed any of my limestone.....well I wouldn't be happy, in fact Id be fuming. Stone needs to breath as Topshop rightly says.

Pebbs

 

[Ajax123]

Does the sealer not prevent it from "breathing".

Also if everything underneath is dry and the stone is dry why does it need to breathe.......

Just a little confused over this breathing lark cos modern buildings are simply not designed to do so.

 

[doug boardley]

my guess is oxidation, you're limestone must have some ferrus content. Not sure what you can do about it though.

 

[DHTiling]

Does the sealer not prevent it from "breathing".

Also if everything underneath is dry and the stone is dry why does it need to breathe.......

Just a little confused over this breathing lark cos modern buildings are simply not designed to do so.

If any moisture does come through a substrate , then if you use a topical sealer this can trap that said moisture in... when a substrate heats up and cools with room humidity or thermal heat, then as it heats and cools it can expel small amounts of moisture... Impregnators allows the stone to breath.. not literally breath lol but to allow passage of moisture from behind if required..

The best way to describe what i mean by air moisture etc,, say you left a pot of salt on the bench/table etc then it will get wet from air moisture..
So air moisture is always present ...

Not saying topical sealers cannot be used but in areas of wetting then deffo a bad idea..

 

[Tony73]

With limestone you need at least 5/6 coats of sealer then a wax top coat

some limestone one coat of stain stop, some 2-3 coats not more (any coat after-waste of money and time)

 

[Topshop]

Thanks for the explaination Dave.

I agree with you Tony. But, the term "coat" needs to be used carefully. Sealers should not be coating anything - they should be in the stone (penetrating) for best results - if they coat they are sitting on top and have been over applied. Any excess should be buffed off because it can adversely effect the stone too. The term "application" should be used. If footprints show or the stone is sticky the sealer has been over applied.

 

[DHTiling]

yep, totally agree, sealed to saturation but without excess of the surface... treat each stone at face value as they all behave differently..