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damp

Structural dampness is the presence of unwanted moisture in the structure of a building, either the result of intrusion from outside or condensation from within the structure.
A high proportion of damp problems in buildings are caused by ambient climate dependent factors of condensation and rain penetration. Capillary penetration of fluid from the ground up through concrete or masonry is known as "rising damp" and is governed by the shape and porosity of the construction materials through which this evaporation limited capillary penetration takes place. Structural damp, regardless of the mechanisms through which it takes place, is exacerbated by higher levels of humidity.

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  1. D

    Tiling onto Underfloor Heating with a Damp Screed

    I'm having a problem, with every floor I'm trying to lay at present (due to our unsavoury weather). The tile assosiation recommend a maximum moisture content of 0.5% in floor screed to tile on. I've just shelled out £350.00 on a professional moisture meter to give me something accurate to go by...
  2. D

    tiling on top of a damp proof membrane

    hi, we are tiling our bathroom and have applied two coats of 'sika prufe' liquid damp proof membrane on to ply. the tile used are limestone and after the sealant was applied the tiles have started slipping down the wall and falling off. I now realise this was the wrong product to apply to...
  3. F

    Damp cause of stains ?

    I've just started a job where the client has has me to replace the tiles because the tiles and grout in particular are stained. Having taken the tiles off I noticed that a small section of the plywood backing is damp :yikes: ( this is after having removed the adhesive). Firstly could this be...
  4. R

    Damp Wall

    Hi there, I have just bought a new house out here in Gibraltar, it is a funny layout and one bathroom wall is actually below ground so to speak. Consequently for 3 months of the year it will be damp, as i am about to rip the bathroom out and start again i am after some advice on how to seal the...
  5. C

    Damp problem

    Hi all Just wanted to pick your brains, totally off tiling topic i know but i need some advice. I have damp patches on my bedroom wall, i've had my roof tiles, chimney stack and pots and gutters checked and they are ok. My builder friend took one look at my gable end and said the whole wall...
  6. K

    quarry tiles and damp proofing.

    Hi, I've just statred ronovating my kitchen.I took up the previous laminate flooring and found the original, 100 year old quarry tiles underneath with no damp course.I had planned to lay some porcelain tiles.I've since had two tilers round.One said to put bitumen down then he'd latex the floor...
  7. A

    Tiling over DAMP plaster

    I am looking for confirmation on a potential problem. I have a plumber that I work for that wants me to tile around a bath area, not usually a problem, same here i thought untill I went to see the job. The plaster skim is not dry, still damp in places. My plumber has said that if I was to...
  8. R

    Tiling on concrete with/without damp course?

    Hello is there anyone out there that can me?! I am fitting a new kitchen in my house. I removed the old floor tiles and underneath was a plastic damp proof membrane. I removed this and there is bare concrete. My house is victorian and i cant tell if there is a main damp course or not further...
  9. 1

    Damp cement base limestone and UFH, DPM, Ditra questions

    Hi, I'm new to the board and I wasn't sure where to post my questions as they seem to cover a few forums. I have a tiler coming to lay some 825x550x20 Mandarin Taj Grey Limestone tiles but we have a problem with one of the rooms the tiles are going to be laid in. The room has a damp floor...
  10. S

    damp walls

    went to price a shower cubicle today ,lots of tiles have blown, letting water behind, which has come thru a 9" wall either side at the bottoms after stripping tiles and loose damp plsater, is there any way i can speed up the drying process so its not out of action too long? its gonna have...
  11. D

    Damp skim plaster on block wall

    Hi all, this is my first post , so forgive me if i waffle a bit .have spent hours on this site taking invaluable advice already to fit new shower tray & tile 3 sides ..but : i removed old tray in ensuite which was in corner between block wall & studwall .damp had set in & patch of skim plaster...
  12. H

    Wet room damp plaster

    Hi - wondered if anyone could advise, please? Builder installed wet room; the floor is wedi and the shower cubicle is wedi on the floor and the walls. Outside the shower cubicle, about 18" where the tiles stop by the door into the wet room, the plaster is showing some damp above the skirting...
  13. O

    Replacing damp carpet with tiling

    Hi, We live in quite a damp part of the country. In our dining room on ground level, we sometimes get water that seeps into the house, making the carpet wet (or soaking wet). This seems to be coming either up through the floor, or in at the base of the wall - not sure which. The house is...
  14. H

    got probs with rising damp!

    I need to tile a kitchen floor, whats the best thing to do when you got rising damp from old inch think querry tiles without having to take them up?
  15. D

    Anyone know anything about damp & mould?

    My neighbour asked me to take a look at her mothers shower yesterday, as they have recently noticed that the hallway floor carpet is wet and it has been caused by water getting behind the tiles, running down to the floor and soaking into the concrete screed. Background.... Bungalow, shower...
  16. P

    Floor and wall tiling in a damp (ish) environment

    Hi First time posting, please bear with me as I am definately an amateur! I am converting a downstairs room in my house to a shower room. The old wooden floor was rotten so has been replaced with a breathable limecrete floor (this avoids the problem with introducing a concrete subfloor which...
  17. F

    damp wall

    hello everybody just a question on a job i am about to start.customers tiles are falling off around bath&shower pulled tiles of and wall is wet there has been no tanking system put on before tiling i was going to leave for a week to see if wall will dry out and if so will it be alright to tank...
  18. A

    Tiling On Damp Brickwork

    I am converting a small understairs room in a 30's Semi into a small bathroom (it used to be the "Coal Hole" in years gone by!). The side walls are both brick, in reasonable condition, although there is some loose and powdery mortar. Both walls are damp - I can see small beads of moisture on the...
  19. S

    Slightly damp concrete

    Hello, I have another question!(I know nothing!). The kitchen floor is slightly damp in places and I'd like to tile it. Before tiling what's the best thing to do?Tank it in the trouble spots?Use Ditra matting?I'm confused about these waterproofing products - I know they stop water reaching the...
  20. S

    Damp proofing and self levelling

    Hi there. I'd like to tile my basement corridor which is slightly uneven brick and prone to damp spots. I wondered if there's a self-levelling compound that does the damp proofing stuff too? If not would I have to apply a damp proof membrane then self-level (please don't tell me I'd have to add...
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