Brick Shed damp coming through walls - advice please

[rob29london]

My shed is made of breeze block and concrete render inside and out. Half of the shed is below ground level, and in winter soaks up the water from outside which is quite bad! The walls inside get very wet. I'm unable to dig out ground around it to do any work on the outside due to its location.

Does anyone have any idea how I can combat this? Ideally I wanted to make inside a nice dry space, where I can have a workshop. I'm thinking I need a barrier on the inisde to stop the moisture getting in - I don't mind what I use but I don't want to spend lots of money on it. Should I knock the internal cement render off and baton a lot of DPM to the walls and chipboard over it?!

I'm pretty unsure what to do with this one, as you can probably tell with my question!

Thank

 

[freddiemercurystwin]

You should avoid fitting any dpm type of membrane that you then puncture with fixings as that will compromise it. You could try a couple of layers or RIW or similar although the surface needs to be good for it to adhere well and there will always be a danger of it blowing off the surface anyway if the water penetration is persistent. Really it needs a skin of blockwork to hold it against the existing wall. Not much else you can do unless you're prepared to throw some money at it.

 

[rob29london]

The area of wall which gets wet is probably about 5square metres. In regards to money, i dont mind what it costs but don't want to spend like 2/3k at it (I'm happy for cheap and cheerful solutions that don't look great!)

The total area is quite small (maybe 1.5M Wide, and 3Meters long) so its quite a small shed so building another layer of blockwork inside is something i'll try and avoid unless theres no other alternative

 

[freddiemercurystwin]

If you have more funds available then the Vandex waterproof render systems may be the most economical/practical in this instance and would be worth investigating.

 

[rob29london]

Hi Freddy, I've looked at their website (http://www.safeguardeurope.com/products/product_menu.php) But unsure as to which one would be the correct one!

I like the idea of applying an internal render.

 

[freddiemercurystwin]

Vandex BB75 is normally used for cellar conversions etc, although can't remember the last time I actually specified it http://www.vandex.co.uk/index.php?id=13&backPID=13&tt_products=1&L=1#p1 This can be protected if required with the refurbishment plaster http://www.safeguardeurope.com/products/vandex_refurbishment_plaster.php

What moisture/damp is coming up through the floor? If it is significant the BB75 can be applied to the floor too and a screed over to protect.

http://www.safeguardeurope.com/pdf_datasheets/vandex_refurbishment.pdf

 

[rob29london]

Theres no damp on the floor, just in the walls! Sporadic patches (no drips) - so I should be able to give it a coat of BB75 and everything would be dandy?!

 

[Norcon]

We do this when we want to stop water ingress against banks or existing porous walls.... Filled behind with 35N.
Benonite the base and sides maybe or water barred.

Works every time....