Rear of Garden Block Shed - Damp

Get In There

Hi.

Along with my Dad & Uncle, we built a small garden block shed a good few months ago in my rear garden.

The outside of the front and sides were plastered but owing to the limited space between the rear and the neighbors boundary fence, it was too tight a squeeze for my uncle to plaster that side of the wall so it was left unplastered. The small gap narrows more as you go further into the gap.

As a result, when we have wet weather that side of the shed often sees dampness enter the shed. The other sides are fine. As I plan on moving the washing machine in the shed in the coming weeks, I would welcome any DIY suggestions/solutions to remedy the issue at hand.

(Asking the neighbors to temporarily remove the fence panels is unfortunately not an option as they have them screwed in)

Photo of gap:

decky1

remove screws from fence, dig down and lay some drainage pipe cover with gravel keeping below you shed floor, screw back fence. Next step put kettle on and wait for rain to find out if I'm right.

Get In There

decky1 wrote: »

remove screws from fence, dig down and lay some drainage pipe cover with gravel keeping below you shed floor, screw back fence. Next step put kettle on and wait for rain to find out if I'm right.

Cant unscrew, neighbor has them screwed in from their side and its their fence panels not a shared one.

jack of all

Doesn't look like you have a gutter fitted along that side so any water that doesn't fall to the ground below is being driven back into your wall, especially wind-driven rain. Fixing a gutter in place will eliminate most of the water that could finds its way there, helps close off the top of the gap anyway.

whizbang

I presume its 4" solids you have, next time use 9" cavity on the back wall..!

There are waterproof paints available, but they don't work very well, I wouldn't trust them.

Best option is to cover with some 3mm corrugated plastic sheets, more recently used as protective coverings for building works. You only need to cover the upper part of the wall, and direct water away from lower part, but as already mentioned, you need to make sure the drainage is good.

FMG

+ what has been said above and also maybe a sloping path of concrete to take any excess rain fall away from the wall.

bman1

Google impervo.... expensive but could solve all ur problems. But u still have to paint it on and I know space is tight. Maybe it can be sprayed on.