Wallpapering over damp patches

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Sunderland06

New Member
On our dining room wall we have some round dark patches which seem to have been caused by moisture coming through the dot and dab spots.

We tried putting a blocker on and then repainting but the marks have returned after a while.

If we were to put up a vinyl wallpaper to cover the spots would they come through again or would they stay concealed?
 

JML

New Member
If you have a damp problem you need to remedy it. Don’t try and mask it, it will only spread and may develop mould and ruin your wallcovering.
 

Densel

Member
Sorry but your asking plasterers about wallpapering???????? If you have a damp problem then get a fully damp insured plaster to sort it out first. But i would tell him your planning to wallpaper it lmfao!!
 

Stevieo

Royal Spin Doctor
On our dining room wall we have some round dark patches which seem to have been caused by moisture coming through the dot and dab spots.

We tried putting a blocker on and then repainting but the marks have returned after a while.

If we were to put up a vinyl wallpaper to cover the spots would they come through again or would they stay concealed?
All your wallpaper would fall off.
 

Havagojo

Well-Known Member
On our dining room wall we have some round dark patches which seem to have been caused by moisture coming through the dot and dab spots.

We tried putting a blocker on and then repainting but the marks have returned after a while.

If we were to put up a vinyl wallpaper to cover the spots would they come through again or would they stay concealed?
Solid wall ??? thermal bridging
try thermal wallpaper
 

beader

Private Member
On our dining room wall we have some round dark patches which seem to have been caused by moisture coming through the dot and dab spots.

We tried putting a blocker on and then repainting but the marks have returned after a while.

If we were to put up a vinyl wallpaper to cover the spots would they come through again or would they stay concealed?
Pictures please.
 

JML

New Member
Are the damp spots on a cavity wall? You may have a penetrating damp problem
Dirty cavity/ties, leaking roof, gutters/ down pipes , rain water penetration etc,etc.
 

JML

New Member
It's a party wall in a mid terrace house.
Struggling a bit with this one, damp spots on the upper half of the wall only ,as it seems, if it was due to cold bridging, you would expect more Evidence on the lower part of the wall where it’s generally colder, and closer to the corner where there is a lot less air movement.
 

beader

Private Member
I would chop out one off the damp spots (can be patch repaired easy) and have a look at what is going on behind .Inspect the adhesive to see if it is damp or moldy .
 

JML

New Member
I would chop out one off the damp spots (can be patch repaired easy) and have a look at what is going on behind .Inspect the adhesive to see if it is damp or moldy .
Good call. If the damp spots are the result of cold bridging you could expect some black spotted mould. If from another source you may find white salt crystals where moisture has been evaporating leaving the salts on the surface. Hope this helps.
 

raggles

Private Member
On our dining room wall we have some round dark patches which seem to have been caused by moisture coming through the dot and dab spots.

We tried putting a blocker on and then repainting but the marks have returned after a while.

If we were to put up a vinyl wallpaper to cover the spots would they come through again or would they stay concealed?

SO, is your kip a cottage like midfield of pallion type of is it a two storey say like, bright street or eden vale ? Is the party wall in the picture on the staircase side of the house or the fire place side of the house ? If you get me drift ?
 

Sunderland06

New Member
SO, is your kip a cottage like midfield of pallion type of is it a two storey say like, bright street or eden vale ? Is the party wall in the picture on the staircase side of the house or the fire place side of the house ? If you get me drift ?
Fire place side of house.
 

JML

New Member
Fire place side of house.
So the damp may be from rain descending down the flue (if the chimney head has not already been removed). Condensation in the flue and or salts from the burning of fossil fuels in the past. Some salts can absorbe moisture from a damp atmosphere and liquify on the surface of a wall, causing dampness.
 
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