Damp proofing concrete block wall

[-chris-]

We currently batten plastic sheets to the wall inside our old grainstore to prevent damp reaching the barley.

I wondered if anyone has experience of a paint on sealant or waterproof render that could be used internally as a more permanant solution?

Thanks

 

[roscoe erf]

We currently batten plastic sheets to the wall inside our old grainstore to prevent damp reaching the barley.

I wondered if anyone has experience of a paint on sealant or waterproof render that could be used internally as a more permanant solution?

Thanks

hi we have tried black bitumen paint to some success but with the driving rain we get it still gets through,where we have straw i have lined the walls inside with dpm which works but not much good for grain i imagine,so the only thing that worked here was to baton the wall on the outside and put tyvex and steel roofing sheets on 100% water tight.bit expensive but a proper job,you could use timber but a bit more maintenance involved.

 

[SilliamWhale]

Can't you seal it externally? Consider a cavity wall using a concrete panel and RSJ for a better solution. Wouldn't take long to do.

 

[suffolksmallholder]

I'd look at stopping the rain at source so fixing profile tin as roscoe erf suggests is the way forward. You can put in an admix to cement based render but I would not like to give a guarantee on this. Solid masonry walls are always a problem as they wick moisture from all around. Doing both the above will be costly but effective. At least you can decide on the colour of the tin!
You will encounter problems with forming a cavity wall on the outside at the top unless this cavity goes right to the eaves or gable. There's a barn local to me with this and the frost has got in resulting in the masonry becoming damaged/flaky. Lead will stop this but the cost of the lead wide enough to dress over and go the width of an average modern(isn) grain store won't be cheap.
SS

 

[jamesy]

How about lining the inside walls with stockboard or perhaps dpm with stockboard on top. I lined a bin in a barn with dpm & ply, it did the trick.

 

[roscoe erf]

[quote="suffolksmallholder, post: 74599, member: 1498"!
You will encounter problems with forming a cavity wall on the outside at the top unless this cavity goes right to the eaves or gable. There's a barn local to me with this and the frost has got in resulting in the masonry becoming damaged/flaky. Lead will stop this but the cost of the lead wide enough to dress over and go the width of an average modern(isn) grain store won't be cheap.
SS[/quote]
and with a cavity not sealed well rodents will love it food warmth perfect

 

[-chris-]

Thanks everyone for the suggestions, the wall is only 5ft tall with fibreboard sheets to the roof. We have sealed any cracks externally and painted with bitumen which keeps most of the damp out.

 

[bluewurzel]

There are available various 2 part brush on resins you can use ( I believe they are used for tanking basements)