Damp?

Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Hi, I have what I think is damp, it's in the Utility room in the extension, that was built in 2000, before we owned the property, we've been her 3 1/2 years.
It's near a tumble dryer that is vented outside, that is what makes me think it's damp, although it isn't wet, the property is a bungalow if that makes any difference and it had the same condition when we moved in, but we had the place decorated before we moved in, so the decorator took care of it.It's a conventional double layer brick wall and it has been insulated, I know this from when we had the outside vent put in.
I've added a couple of pictures. As you can see it's a bit Bubbly and loose, some of the paint has flaked onto the floor and if I wipe the wall with my hand it is a bit powdery.
How do I get rid of it and stop it coming back?
Someone said to use some Unibond PVA Adhesive & sealant, but I thought I'd ask here.

Many Thanks, Steve
 

Attachments

  • IMG_5209.JPG
    IMG_5209.JPG
    130.4 KB · Views: 168
  • IMG_5210.JPG
    IMG_5210.JPG
    185.5 KB · Views: 188
Sponsored Links
Joined
18 Oct 2010
Messages
113
Reaction score
22
Location
Bedford
Country
United Kingdom
Hi, I have what I think is damp, it's in the Utility room in the extension, that was built in 2000, before we owned the property, we've been her 3 1/2 years.
It's near a tumble dryer that is vented outside, that is what makes me think it's damp, although it isn't wet, the property is a bungalow if that makes any difference and it had the same condition when we moved in, but we had the place decorated before we moved in, so the decorator took care of it.It's a conventional double layer brick wall and it has been insulated, I know this from when we had the outside vent put in.
I've added a couple of pictures. As you can see it's a bit Bubbly and loose, some of the paint has flaked onto the floor and if I wipe the wall with my hand it is a bit powdery.
How do I get rid of it and stop it coming back?
Someone said to use some Unibond PVA Adhesive & sealant, but I thought I'd ask here.

Many Thanks, Steve
A real good scraping down and clean off all the powdery residue and then give all the areas a coat of Zinserr and then fill areas and rub down and apply your top coats, but if you have a damp problem from the outside it will just do it again.
 
Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Thanks for that. I've not heard of 'Zinserr ' before, a quyick look on Amazon shows a few different ones, do you mean '123 Bulls Eye Primer / Sealer Paint? The guy that said about the Unibond PVA Adhesive & sealant also said to give it a good wipe over with some bleach, should I do that?
I don't think the damp is from outside, I think it's due to the heat of the Tumble Dryer and the fact that it's an outside wall, even though it's insulated and double layer of brick, I still think that the difference in temperature between a cold outside wall and a ho tumble dryer will cause condensation, and I assume that is why I have this problem.
Thanks again, Steve
 
Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Thanks for the suggestion JohnD, Nope, no water pipe buried or on the surface, no waste pipes, no drains, No Down pipe from gutter and gutter is clear.
Any idea which 'Zinserr' I should use, they all look fairly simular
 
Joined
28 Jun 2005
Messages
21,549
Reaction score
1,966
Country
United Kingdom
There's a Zinnser Watertite - on Amazon . Looks good for your application.
 
Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Joined
20 Jul 2010
Messages
536
Reaction score
169
Location
Mid Glamorgan
Country
United Kingdom
Zinsser watertite is not really suitable to paint over afterwards, Leyland trade damp stop will hold back the damp and you can paint/paper over it with no problems.
 
Sponsored Links
Joined
15 Apr 2012
Messages
507
Reaction score
35
Location
London
Country
United Kingdom
Forget about any type of paint because you would be wasting your money. You must first, find and rectify the cause of the dampness.
 
Joined
2 Dec 2017
Messages
2,368
Reaction score
444
Country
United Kingdom
as last post above.

youve got penetrating damp - and maybe rising damp as well.
the skirting could be rotting.
ignore the nonsense about applying so called blockers and sealants.
pics of the wall outside and how the door's sealed will help. the door appears to have been fixed wrongly in line with the face of the outside wall surface, it should be recessed a min of 75mm.
do you mean you have cavity insulation?
do you have outside render?
 
Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Thanks for that. I've felt the skirting board and it feels fine. I've attached some pics of the outside wall, it's not rendered but I have noticed some white near where the damp is the othe rside, there is a step and there is a slight gap (3mm) between the step and the brick, Yes I have cavity wall insulation. I've measured the door recess and its about 10mm, so no ware near enough, but might be a pain to move.
 

Attachments

  • IMG_5220.JPG
    IMG_5220.JPG
    407.7 KB · Views: 150
  • IMG_5221.JPG
    IMG_5221.JPG
    233.4 KB · Views: 158
  • IMG_5222.JPG
    IMG_5222.JPG
    344.5 KB · Views: 155
Joined
2 Dec 2017
Messages
2,368
Reaction score
444
Country
United Kingdom
if the skirting is rotting it will be on the back side - take a length off and examine the back.
after removing a length of skirting look for any signs of the edge of a DPM.
the white stuff on the brickwork is efflorescence - dont worry about it.
the step is a codge up and might be bridging the DPC/DPM - lightly probe the mortar beds to locate the DPC bed.
yeah, dont mess with the door but check around the frame that its well silicone sealed.

i cant clearly see the canopy arrangement - is it flashed into a mortar bed where it meets the wall? does the canopy definitely slope away from the house?
if moisture is somehow penetrating into the cavity and soaking the insulation then you've got a problem because wet insulation takes forever to dry out - if then?

you could remove all 3 pieces of skirting in damaged areas, and hack off all plaster that shows damage.
dont re-plaster using gypsum plaster - instead use a 3:1 mix of sand and lime.
re-fix pre-painted, sound skirting.
 
Joined
10 Feb 2006
Messages
295
Reaction score
2
Location
Essex
Country
United Kingdom
Thats for that, sounds a bit complicated for me, I'm a basic DIYer, I'll get a builder that I trust to take a look.
Well done for noticing the Canopy :)
 
Joined
14 Mar 2006
Messages
18,656
Reaction score
2,180
Location
Kent
Country
United Kingdom
Looks like penetrating damp caused by the built up step under the door breaching the dpc.
 
Sponsored Links
Top