Ask a Tradesman

Damp Proofing Questions

Our expert damp proofers have kindly agreed to share their wisdom on such topics as removing mould patches, rotten timber, causes of mildew, damp basements, rising damp, floor construction, flooding and waterproofing and much more.

Answered your question? You can find a reliable and local Damp Proofing Specialist in your area today!

1,089 Damp Proofing questions

how much can will a standard damp proof course cost and how long to get it done.

I am buying a property in Scotland, a repossession. The survey indicates damp at the rear of the property. I notice also that the laid wooden floor has 'popped up' in the centre of the floor some distance from the damp area. Could this indicate a problem with floor joists in addition to damp at rear. What would be the best way of ascertaining problem from an external view and roughly how would it be resolved and what are the potential range of costs.

we have damp patches appearing in random patches on roughcast - lot of snow in gutters in dec &the guttering and facias are fairly new - no probs previously

i have damp in the bay of my terrace, the small front garden is concreted right up to it and the bay is rendered there no drainage when it rains is thet the problem

Sparky 1st fix or membrane first?

Edit- thanks for replys..

Does gas get done before damp proof?
I want to take it back to bare brick but which is cheaper -

Batten walls with insulation or render walls again?

I'm renovating my house and which is first;
Damp proof membrane
Sparky 1st fix or Gas first fix??

Also can the damp proof specialist sand and cement over wires?


I an selling a 200 year old cottage that had damp proof chemical injection and replastering. didnt get garrantee, can this now be covered.

how to resolve damp patches mid way up wall in basement room

thank you all for replying .
You all work along way from me so .I don't think you would be able to visit .
I like the nuair flatmaster idea and went on their website but would like to know from someone who has used these ?.
I can't dig the earth out from the other side of the end of terace wall as I don't own this land which is a huge pity as that would have been my first course of action .
The gurantees for the damp have finished and 1 firm wanted £90 to even have a look !
I will try and get a local damp proof builder out to see the prolem

Bathroom Mould

I live in a 3 bed semi in an old RAF house and the bathroom mould is driving me insane!!!! I have lived there for a year now and the whole bathroom slanted ceiling over the bath is completely covered in thick black mould, nothing I do to clean will get it off. Also down the long sides of the bathroom has also got it most the way down. The bathroom does not have an extractor fan and the window is cracked from top to bottom on the inside side of the glazing. I am just wondering what sort of tradesman I need to sort. PLEASE HELP :-(

Do I need to have a sump pump installed in my cellar if I am having it water-proofed?

cellar has black rot due to poor ventilation and is under ground level, but has never flooded before. I have had several damp-proof companies come to have a look, and some say it must have sump pump due to BS regulations or something, and others say, no the floor is dry so doesnt need one, just needs p20 membrane tanking system and humidistat fan.Please advise me, it's alot of money to gamble and I dont know who to believe.
thanks a million

Renovation of 1920 house single brick construction

Have experienced very wet wall down chimney breast and damp coming through damp course. The house have been empty for 3 years and roof tiles missing, warped guttering allowing water to fall down the walls. Chimney and stack removed and dehumidifyer running constantly to dry out. Also an extension very close to the wall and some builders rubble can be seen which may well not allow water to drain away. The floor boards are dry. Have had advise so far that I should cement render with salt inhibitor, skim create a stud wall thermal board and plaster. 2nd suggestion use planton membrane, create a stud wall thermal bd and plaster. I have read that houses of this type need to breath so sealing the walls may cause problems later on with trapped moisture. from what I have read these old houses cannot be treated in the someway as modern day build. I suspect that now there is no water coming in then the problem may be solved but still have the ground debris which I cannot get to. Any advise would be appreciated as to the best way forward. do I call in someone who knows about old buildings. where do I start?
The internal walls all had polystyrene as a form of insulation which I have removed. I wanted to thermal board the outer walls, but am not sure if this is the right way to go. Would the walls have to be battened to allow breathability between the wall and thermal boards. The out shell of the house has been rendered in an ecotex material. I need to find out what effect this has on the building and what type of paint to use at some point. Any advise please.
Thank you

Damp patches around front door frame.

Hi, we live in a 1980's timber framed bungalow, we have noticed that there is a damp patch (about 2 to 3 cm deep) around the UPVC front door frame, both sides and across the top.
The door was put in (before we bought it) 12 years ago, the sealant on the inside doesn't look 100% and is perished in places but externally all seems fine,. The door is set back from the front creating a kind of porch, so I'm surprised rain/water can get to it. Any thoughts as to what this could be, was thinking condensation?

Need help with your project?

We have tradesmen ready to help you. Post a job, read reviews and hire today.

Post a job

Need some help?

Post a job on MyBuilder to find quality, local Damp Proofing Specialists who can help you with your project.

Need some tips or advice?

Ask a Question