dpc

  1. C

    HELP!? Keeping A 1970's Single Garage Dry?

    Hi All! First time post but have been a long time reader of the forum. I bought my first property in 2020 which is a 1970's maisonette which includes a single garage which is one of the middle garages in a row of 4. Last winter and whenever there is heavy rainfall the garage becomes damp as...
  2. A

    Airbrick position with ducting tube

    Hello all, I need some help and advice: A building control officer has recommended a builder to use 6" high timber frame joists to be used with 100mm insulation inside the frame as the proposed suspended timber frame joist of 4" high isn't strong enough for the underfloor heating, because of...
  3. T

    Screeding over cavity

    I am currently renovating my kitchen and am looking for some advice in how to screed over a cavity. A section of the old screed layer has broken up around the edge of the patio door threshold. At the moment, there is a dpm under the patio door overlapping the cavity and meeting the main dpc...
  4. M

    Bridged dpc?

    We have just had an extension built and have noticed that our next door neighbours have quite bad damp (albeit under their dpc) however our corner that touches theirs is now becoming damp. Looking at the images our dpc is visible and then disappears closer to their wall. Should this be exposed...
  5. E

    ?Oversailing at DPC

    I've lived in my current house for over 20 years now- 1940s semi. I must admit, I never pay close attention to brick work etc, but I know there are no cracks or obvious signs of subsidence. I'm planning on resurfacing my driveway and as part of this, I've had a really good look at the DPC. I...
  6. CandiceM

    Painting DPC - any tips?!

    We’re having our bungalow cladded with Cedral cladding. The cladding can’t go below the DPC and for aesthetic reasons we’d like to paint DPC white - the reddish brick against light grey cladding doesn’t look right to us. Before shelling out for the painting to be done professionally, I’d like...
  7. CandiceM

    Painting below DPC - any tips?!

    We’re having our bungalow cladded with Cedral cladding. The cladding can’t go below the DPC and for aesthetic reasons we’d like to paint DPC white - the reddish brick against light grey cladding doesn’t look right to us. Before shelling out for the painting to be done professionally, I’d like...
  8. R

    Window sill corner detail

    Does anybody have a diagram or drawing showing how the lower corner of a window sill is constructed, and how the DPC and cavity closers join/overlap to form a waterproof joint? I have recessed windows (i.e. they sit in the middle of the wall), and will be making a sub-sill from creasing tiles...
  9. R

    DPC thickness

    The building regs say a DPM should be 1200 gauge - but what about DPC? The DPC's you buy in Toolstation and the like seem to be thicker than 1200 gauge, but what is the actual requirement? Could you use a sheet of DPM cut into strips as a DPC? - for example, as a cavity tray above a lintel...
  10. M

    Height of internal floor too low or DPC too high

    Hi, I'm getting to the end of a renovation and the concrete floor screed has been laid. This is in a rear extension to the kitchen and also a new extension at the front. There is a gap of about 3 inches between the top of the floor and the DPC level, both at the front door and at the back...
  11. B

    Foundations for my outbuilding

    Hi all, I hope you are well. I'll try to keep this short. I am building an outbuilding (hopefully to use as an office / gym). The size is approx. 7m by 4m. It is being built on the boundary so within 1m. I plan to build it all of the light breeze blocks (except two rows of bricks at the...
  12. R

    Confused about Vertical DPCs at wall join

    Evening All. This seems to be one of the few topics that the Internet does not contain endless chapter and verse on... and that information that is available is less than clear. I'm talking here about the vertical DPC at the join of a new cavity wall for a house extension to the existing cavity...
  13. B

    Drive angled towards.house causing water pooling on the side of house

    Hi there I recently bought my.house which is now showing a lot wrong with, I know I need to get the pointing done and the roof verge but have now discovered the drive drains into the side of the house, the bricks below dpc in one particular spot are saturated but not above, I am worried about...
  14. M

    Patio above damp proof course?

    Does the patio in this picture look ok? There's a strip of gravel between the slabs and the wall, but I think this is above the DPC; anything to be concerned about? I'm not sure where the DPC is tbh, or if having gravel above it is ok.
  15. M

    Inner leaf damp proof too high?

    Hi all, hope you are well. We currently have an extension underway and it appears the dpm will be a good bit higher than the finished floor level (almost a block higher). I assume they have got this wrong due to sloping ground and having to add a cavity tray. The builder is no longer with us...
  16. M

    Patio above dpc -- landscaper wants to use lead flashing...

    Hi, Is it ok to protect a DPC by chasing in lead one course above it and laying patio up to it? Any hints on how to do it? Landscaper has built a 120mm reinforced concrete raft for a patio to replace part of an existing patio (it's 3 ft above garden level but same level as kitchen). The raft...
  17. S

    Exposed joists under front door

    Hi, I'm currently doing some work on the front garden to take the ground level below Dpc level and have removed paving slabs from the whole area. However after removing the ones in front of the front door, it's exposed the sub floor beneath the hallway. There's no outer brick skin present just...
  18. T

    wall DPC injecting - when did it all begin?

    Hi all, removing some skirtings we found injection holes, in a room which has damp problem. Was wondering if there is a known data when the (absurd) practice of injecting a DPC all started here in England, particularly South West?
  19. M

    Tanking slurry vs bitumen emulsion. Damp garage wall.

    I have a garage which is built with the walls sitting on the concrete slab, with a DPC at floor level, single skin brick. Parts of the walls are below ground, when it rains water seeps through the DPC. I've dug out and exposed one side and will cut back the DPC as close to the brick joint as...
  20. SS-ProjectBuild

    XPS insulation below DPC in trench...

    Hi Guys, Any issues with placing 50mm xps insulation slabs externally in the trench below dpc/ground level before backfill? To help with insulating the building? Please see pics.
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