Garden shed

[De Sisti]

Have you thought about concrete sheds?
https://www.hansonconcretegarages.co.uk/

[andyoxon]

When we had our shed built, I asked for polyester reinforced felt - supposed to last ~15yrs.  8 yrs so far.

[chrisbainbridge]

I have used the Keter plastic sheds but just as garden sheds. Certainly would not keep good bikes in them.

[hellymedic]

Have you thought about concrete sheds?
https://www.hansonconcretegarages.co.uk/

Our garage is a similar animal, if from another supplier. We paid extra for more height and the windows supplied were not as specified.
There has been water ingress where the walls join the floor. It's OKish but not wonderful.

[Aunt Maud]

We are looking at this, for similar reasons. We will probably overcapitalise with electric power, insulation and reinforced concrete slab. I don’t like doing bike maintenance in the cold.

You'll need a concrete slab to conceal the bodies.

[drossall]

Somebody pointed out recently that the cheapest way to do that is to plant protected wildflowers on top, as digging those up is not allowed.

[Asterix, the former Gaul.]

A good way to prolong the life of a shed is to provide guttering (troughing).  Stops the bottom of the walls getting soaked every time it rains.

[redshift]

A good way to prolong the life of a shed is to provide guttering (troughing).  Stops the bottom of the walls getting soaked every time it rains.

True. Ours keeps our water butt topped up for watering the peppers and tomatoes in the greenhouse.

[Regulator]

Our most recent shed (Mr R's) is from Beast Sheds.  Seems nicely robust. 

[hellymedic]

A good way to prolong the life of a shed is to provide guttering (troughing).  Stops the bottom of the walls getting soaked every time it rains.

True. Ours keeps our water butt topped up for watering the peppers and tomatoes in the greenhouse.

Our garage guttering supplies our water butt; useful for plants and also for the odd bucket toilet flush when Affinity don't/can't supply.
I can't see any guttering on the prefab concrete garages shown above. Something that size really needs guttering IMHO.

Guttering for smaller sheds is also a good idea.

[redshift]

Our concrete shed is from Hanson, and we fitted guttering as part of the outfitting process, along with the insulation and lining of the walls and roof.  The raw building had a terrible resonance, so there had to be some kind of lining or you couldn't hold a conversation.  The insulation means you can still work in it in winter, and the machines don't freeze or get covered in condensation. Sealing took a while, until we managed to find and eliminate all the tiny ingress points.  If you don't seal, and don't install guttering then it'll be permanently damp, at least around Manchester!