Shed against damp retaining wall

My daughter's house is built into rising ground and has a 5ft (1.5m) wide p assageway at the back of the house to a brick wall retaining the garden - t his wall is near enough 4ft high (1.2m). This passageway is used typically for here rubbish bins and not much else.

She's asked me to look at whether it was be possible to build a low shed th ere to store 3 adult bikes in - the height limit on the house side is in th e order of 1.6m.

There's enough space and height I've worked out and my thinking is a waterp roof plywood floor on concrete blocks with a bit of membrane - rails on tha t to guide the bikes in - double doors, etc., and spanning it across to the retaining wall so that there isn't a narrow gap for muck to collect in.

The question is how to do I cope with the moisture in the retaining wall ?

Thanks Rob

Reply to
robgraham
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passageway at the back of the house to a brick wall retaining the garden - this wall is near enough 4ft high (1.2m). This passageway is used typical ly for here rubbish bins and not much else.

there to store 3 adult bikes in - the height limit on the house side is in the order of 1.6m.

rproof plywood floor on concrete blocks with a bit of membrane - rails on t hat to guide the bikes in - double doors, etc., and spanning it across to t he retaining wall so that there isn't a narrow gap for muck to collect in.

A ventilated gap would usually be a good option.

NT

Reply to
meow2222

Is there any point in trying to give it a waterproof floor etc? Bikes don't mind having their 'feet' in the damp. You could for example put gravel on the ground inside the enclosing walls; bikes would roll ok, any water that does go in (eg with/on the bikes) will drain away ok, and modest amounts of damp coming through the wall will leave again more easily.

Reply to
Jeremy Nicoll - news posts

Could you clad the wall inside the shed with something like Aquapanel - spaced off the wall by an inch or so on tanallised battens, and with the space between the wall and the Aquapanels ventilated to the outside?

Reply to
Roger Mills

I didn't make it clear that I'm assuming that you'd build a shed wall up from the top of the existing retaining wall, rather than putting a wooden (or whatever) wall just inside the existing wall...

Reply to
Jeremy Nicoll - news posts

Don't quite follow the geometry. At one side is the house, is the garden retaining wall the other "side", or is it at the end?

Irrespective of this, I'd echo the other poster who says why do you need a floor (unless you really need a dry shed, e.g. for bike clothing, tools, or other stuff).

The traditional "bike shed" just has a roof, with plenty of ventilation. I can see that you might need lockable doors at the entrance for security. Why not just build a "car-port", i.e. a roof over the space (onduline, polycarbonate, corrugated PVC, metal sheet) with a door frame and doors closing off the access.

Reply to
newshound

...

You may want/need to keep a bike indoors on a decent floor. If so, just make up a suitably long section of plastic guttering -- complete with glued-on endcaps -- and stand the bike in this. Water from a wet bike will drain off the wheels and mudguards into the guttering. Which should be easy to periodically clean and drain.

If nothing else, this may stop your mum shouting at you for making a mess of her best Wilton carpet.

Reply to
Dennis Davis

Ten years ago I built a shed with conventional construction, with a six inch air space between it and the 7ft retaining wall. I put mesh along the top of the gap so leaves didn't get in. It's absolutely fine, no damp at all. The floor is concrete.

Bill

Reply to
Bill Wright

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