Is Plastisol coating worth the extra cost

[fang]

Looking at reroofing a shed to use as a workshop with 13/3 corrugated. Is the cost of the plastisol coated sheets worth it? I know they are meant to last longer, but has anyone had any issues with water getting under the coating or the plastic starting to flake off? I know the painted finish isn't as durable but then you can keep it painted

 

[Kidds]

Thought they were galvanised under the plastisol anyway. I would choose plastisol over painted

 

[eagleye]

depends, the problem can be the underside is often only a thin 5 micron paint finish and near coast or in agressive atmosphere inside shed can rot before outside. Different manufacturers may have different thicknesses, plastisol is 200 micron normally for the plastic. Need to check the spec of what you are buying

 

[willie waver]

yes, have sheds I built myself 30 years ago, plastisol tin still looks great. got a neighbour who had a well known shed manufacturers sheds put up after mine, painted tin, and they look like rusty crap now

 

[Pan mixer]

Plasisol is good but I noticed the other day that a plastisol end apex triangle which I had cut with my trusty angle grinder from 'roof length' sheets 25 years ago has had rust creep up the ends which had been cut and the tin had almost rusted away.

 

[Doing it for the kids]

Plasisol is good but I noticed the other day that a plastisol end apex triangle which I had cut with my trusty angle grinder from 'roof length' sheets 25 years ago has had rust creep up the ends which had been cut and the tin had almost rusted away.

dont nibblers reduce this?
i think it’s fine untill the coating gets damaged

 

[Courier]

yes, have sheds I built myself 30 years ago, plastisol tin still looks great. got a neighbour who had a well known shed manufacturers sheds put up after mine, painted tin, and they look like rusty crap now

Yep, the Plastisol will look great, just a pity about the base metal which will almost have disappeared by now.....

 

[Courier]

0.7mm thickness galvanised makes a good base for painting and will certainly have a longer life even "as is".

 

[Pan mixer]

dont nibblers reduce this?
i think it’s fine untill the coating gets damaged

No idea but the damage caused by the angle grinder certainly made the sheet rust upwards in the vertical apex sheets.

 

[jamesy]

Plasisol is good but I noticed the other day that a plastisol end apex triangle which I had cut with my trusty angle grinder from 'roof length' sheets 25 years ago has had rust creep up the ends which had been cut and the tin had almost rusted away.

I’ve noticed this on the end of sheets that I haven’t cut!

 

[sodbuster2]

The quality of plastisol sheet material is increasingly variable and difficult to determine since its coming from all corners of the globe rather than good old british steel several decades ago. Check the guarantee and its associated terms and conditions to give you an idea of its value!
I will be using fibre cement from now on....

 

[fang]

Thanks for the replies, I'll get a bit more info from the suppliers. Sounds like it might be a good idea to cold galvanise any cut edges

 

[Forever Fendt]

Definitely use plastisol and if you must cut it use 1mm slitting disc as they don’t generate so much heat when cutting

 

[Pan mixer]

Definitely use plastisol and if you must cut it use 1mm slitting disc as they don’t generate so much heat when cutting

I don't think that they were invented when I did mine.

 

[agrotron]

Use tin snips or nibbler to cut. The cutting action of a shear/nibbler smears the cut edge with zinc from the Galv stopping the cut edge rusting. If you use a grinder it will go rusty straight away and the paint will start lift peel.