Cat litter - bear with me here.....

Leave it until tomorrow @ARMANDII - it is pelting it down out there

 

It is such a sod to take down @Sheal, not least because it had to be installed with about a foot gap between it's side and the greenhouse - that, and it costs a good few hundred sheets (near on a grand by the time I partially levelled the ground and built the base) only a couple of years ago, so its a hell of a waste.

If I did abandon it, I would have to replace the base again to fit a new shed, and how good would a second hand shed be that has been hauled down and transported?

 

Aye, it would be quite something @pete - best of it is, the only dehumidifier I have is a portable air-con, so if I have to do that to dry it out, I will have an air-conditioned shed

 

Too late!!! Just to make you feel guilty I came indoors looking like...



The paint is Thompson's Emergency Roof Seal






...........and it really does work, as I know from experience. It's very thick and will fill gaps etc easily.

 

Thank you @ARMANDII - good of you to go to so much trouble. I will have to mount a brush on the end of a stick to get to some of the bits down one side, but the rest I will be able to get to easily. If I get a clear window (and don't end up working) this weekend, I am going to tackle it.

Going to order a tin of it now.

 

I am going to bank on the sealants to start with @Sheal - I have waterproof expanding foam on its way which I intend to spray around the walls where they meet the floors, then I have ordered a litre tin of the stuff Armandii recommended for the outside, and some brushes to get it applied. I will move some stuff out of the shed into the greenhouse (the stuff that is less fussy about storage such as shovels etc) to give me enough room to work and then I will use that blow heater on dry days to blow directly at the floor like a hair dryer (I'll suspend it somehow) to try and get things drying.

After that will be the sand/straw/dehumidifier or even silica gel if I can lay hands on some that isn't to expensive.

The annoying bit is, if it is water tight, its actually a nice size, nice looking shed. All it wants is an LED light in it, and I am sorted.

 

There should be enough to paint where you want to inside as well, FC, just to double up the job!!

 

FC, going by your sketches I can't spot anything obvious.

From your photo if your door channel is the same as on my shed, it will have drain holes that must be kept clear. I siliconed inside the drain holes to try and divert water outside, it's not a great design and an obvious weak point.

I'm thinking it's the roof that's leaking going by your description of how it gets wet after rain. I recall Sheal's idea from your previous thread about using a tarpaulin - might be a quick way of checking.

 

I actually enlarged the drainage in the door channel; when we were first testing water tightness, and were really going for a proper deluge with the hose, the channel filled up and wasn't draining quickly enough, eventually over-topping and running into the shed. I used a plunge cutter to cut three rectangular holes in the bottom of the channel and through the flooring sheet which then leads to the open cavity under the shed base.

We have checked the roof over and over again, and even under an utter deluge, nothing can be seen coming in - I will know better after the weekend (assuming I don't end up having to work) - once I have done the sealing work around the bottom, I will get Mrs C to douse the shed thoroughly whilst I remain inside watching for ingress.

 

Definitely not rising Jack - my greenhouse would be swimming too if it was