damp proof

  1. B

    Sash window to casement window gap filling

    Hi All, Just carrying out a diy project of installing new casement window where old wooden sash window was. I am confused regarding 2 points. Firstly the old wooden sash frames had vertical DPC pinned into the frame and pushed into the cavity. Would I need to replace this with UPVC casement...
  2. M

    Damp proof self levelling

    Hi, iv recently knocked my kitchen through to my dining room leaving a gap in the floor that will need filling in. My problem is, I don't know if I need any damp proofing and wondered if anyone could help. Is self levelling compound damp proof? Iv attached a pic so you get where I'm coming from...
  3. M

    Using Damp proof membrane as vapour barrier

    Have a good amount of damp proof membrane left which my builder previously used when laying down concrete. Really heavy duty stuff this: https://www.screwfix.com/p/capital-valley-plastics-ltd-damp-proof-membrane-blue-1200ga-15-x-4m/98181# I'm fixing insulated plasterboards with built in vapour...
  4. N

    Help: Repoint or Render?

    Hi there I wonder if someone here can give me some advice / help on this. In our external wall, the brickwork below the render is in poor condition. You will see in the pictures attached. One side backs onto the garden, the other is sitting below the decking. The first question I have is...
  5. S

    Ground level changes and DPC. My project house!

    Good evening I am after a bit of advice regarding patio replacement and ground level if anyone would be kind enough to share their thoughts. I have owned this place for a couple of years now and I knew it was a project! Constructed in late 1970s and sold on 3 or 4 times. The original builders...
  6. E

    Do I have a DPM?

    Hello, I’m planing and laying click flooring on our ground floor. I intend to screed to get a good level using NA. Most of the ground floor are marley tiles. I’m planning on either screeding over the tiles or remove, depending on how easy they come up. ( I’m aware of the asbestos issues and...
  7. Pie&Chips

    What to repair this black layer with?

    Hi all, I have taken the skirtings off a late 60s/early 70s building and in some areas there was damage caused by the nails as seen in the picture. I am filling these with a rapid set cement based mortar. The question I have is that there is a smooth, rubbery feeling black coating that...
  8. C

    Bridging DPC to DPM

    During the build of our extension the builder built the walls (outer and inner) before laying the slab. This means the DPM does not go under the course of blocks containing the DPC. Is this a normal practice these days? There is also a gap between the end of DPM in places and the DPC, can this...
  9. J

    air bricks / sub-floor ventilation

    I have very high humidity in the bedroom of my one-bed Victorian conversion flat. I have a basement and can underneath the bedroom. There are no air bricks underneath the bedroom or nearby. Also, underneath the bedroom floorboards, there's also lots of rubble and other bits and pieces from when...
  10. J

    Damp, Black mould on an external wall.

    Hello, I want to stop suspected rain water entering through the exterior wall of my house, and causing damp in a downstairs room. The house is an edwardian house [1920s build, single brick wall, lime plaster. outside rendering looks about 1970s.] --- The room is downstairs with one exterior...
  11. T

    Small flat upper storey concrete floor: DPM needed?

    Hi all, Any information or help with this would be really appreciated. My wife and I just bought an old council flat, 50s construction, on an upper storey. The floor is a concrete slab, there's another flat beneath it. Neighbour says that flats used to be floored with tiles throughout, is...
  12. C

    Basement damproofing -Synthaprufe

    Hello all I'm currently damp proofing my basement. I have hacked off the plaster and intend on applying Synthaprufe to tank the walls. The masonry walls aren't in great condition, is it advised that I stabilise the walls before applying the Synthaprufe or is there no need? Also, there are a...
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