Sheet Materials for Workshop Roof

[Fred Page]

What are the cheapest sheet materials for a workshop roof (30 ft by 20 ft)? Currently has rusted corrugated sheets. As a child I remember people using hot tar to coat over rusted sheets. What would be the modern equivalent coating?

 

[Jelly]

Depends how long you want it to last, and what other constraints you have.

9mm OSB3 boarding, covered with EPDM, is probably the most cost-effective in the long term, but much cheaper materials are available which would work ok for a reasonable length of time.



If you're considering trying to life-extend what you have, You can still get bitumen coatings (both paint on "cold" emulsion products, and actual blocks of bitumen you melt and apply hot); and they still work really well, but are messy and difficult to apply.

 

[TheUnicorn]

cheap but only lasts a year offers no value at all, I'd be asking what offers best value.

is it pent of apex?

 

[Woody2Shoes]

Onduline is cheap or more crinkly tin...

 

[Woody2Shoes]

I'd paint the metal with bituminous paint like this kind of thing:
https://www.wickes.co.uk/Wickes-Metal+Concrete-Bitumen-Paint---Black-5L/p/151462