best way to dry out plaster

[low drains drifter]

we have a leak stain appearing on an internal wall. We can't be 100% certain but we think we have repaired the source. We have been using fan heaters to try and dry it out without much success. Is there a quicker way to do this? Not a huge problem in the grand scheme of things but it's a rental property and trying to sort it out for tenants as quick as possible. Worst damp reading is 34%

 

[JohnD]

Open the windows.

Moisture is removed by ventilation, not by heat

If it is a house, opening the loft hatch will cause damp air to rise up and gush out through the eaves, because water vapour is lighter than air, so it rises.

You can put a domestic fan (not a fan heater) to blow on the wet patch to speed evaporation, but you then have to get the water vapour out of the house.

What do you think the source of water was, and how do you think you might have repaired it? What is on the other side of the wall? A bathroom?

 

[low drains drifter]

Open the windows.

Moisture is removed by ventilation, not by heat

If it is a house, opening the loft hatch will cause damp air to rise up and gush out through the eaves, because water vapour is lighter than air, so it rises.

You can put a domestic fan (not a fan heater) to blow on the wet patch to speed evaporation, but you then have to get the water vapour out of the house.

What do you think the source of water was, and how do you think you might have repaired it? What is on the other side of the wall? A bathroom?

thanks for comments. source of water we think was a leaking pipe inside the electric shower unit on the other side of the wall. I've got a very good plumber who is excellent at sussing out leaks. So, as you can imagine every time someone had a shower water escaped into the wall. My plumber changed the joint and the shower has not been used for about a month. I wonder if it is just so saturated it is taking time to dry out. That said, when we have had new plastering done it has started to dry out after a couple of weeks. Using a dehumidifier hasn't helped & it's a ground floor flat. Is a saturated wall more difficult to dry out that new plaster?

 

[Wayners]

Summer fan. You don't need heat just air movement to dry it out. Just like washing on a line when the wind is blowing

 

[low drains drifter]

Summer fan. You don't need heat just air movement to dry it out. Just like washing on a line when the wind is blowing

ok, I've ordered this so we'll se if this does the trick. It's 20" so it's large enough

 

[Wayners]

Ha. Don't half blow those. I use to dry out paint ect so I can crack on

 

[JohnD]

They used to say a wet brick wall dries out one inch per month