New palladio door water ingress problem?

GerryWall

Hi

Bit at a loss so hope someone can help with a pointer? New Palladio door installed but have water coming in when it rains. The installers will hopefully come out a 3rd time but they keep saying it won’t let water in but it does. They’re waiting for a dry day to fix for 3rd time but I’ve lost confidence. I want to be able to suggest what the problem might be?

Photos of external door, threshold and water starting to come in internal. It gets a lot wetter. There’s no cill, it’s installed on concrete they filled in. I asked for wide weather bar but they said it would be a tripping hazard. I also said I’d like storm guard threshold but it’s standard pvc.

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Any thoughts appreciated.

Thanks

Ger

10-10-20

Hi. Hmm, that's a curious install. Is this a retrofit of a stone building or what is the architecture?

As you pointed out the door is sitting on a concrete threshold, except it's not a weather proof threshold, it's just a flat beam with no fall or runoff. I'm guessing that the water is leaving the surface of the door and falling into the frame, then exiting the weep holes and tracking backwards under the threshold into the house.

If you fill the frame with water on a dry day, can you see the pool forming inside?

Anyway, the correct solution for this is a full threshold with a fall/runoff and DPC which is installed with the upstand under the frame, sealed with silicon. The DPC needs to be lapped up and over the internal side of the door threshold and should then meet the subfloor DPM (which isn't present in your build). The image below gives an idea of this layout except there is no upstand shown on the back side of the threshold.

https://detail-library.co.uk/product/mw20/

Note how the DPC follows the threshold out and past the point of the 'step' so that runoff does not track backwards.

GerryWall

@10-10-20 that’s fantastic information thank you. It’s a block wall - house is 30-40 years old - there was a timber door there previously. I’m thinking this is beyond the door installers capability. Great response thank you and I can now get a plan together

10-10-20

Two things came to mind afterwards. That lower weather/drip bar on the face of the door is supposed to come out just further than the frame of the door so that it can shed water. Check that it does.

The 'compressible insulation' shown under the threshold won't be in that location on your door, you can install insulation further back so that the door is well supported across the threshold.

GerryWall

Great, thanks so much. That now makes complete sense. Brilliant. My only query is now do the door installers do this/ideally have known this or will the door have to come out and I get a builder in?

10-10-20

https://www.boards.ie/discussion/comment/122702272#Comment_122702272

It looks to me like the doorway wasn't constructed correctly, to be honest. It's missing the DPM and the drop from the interior floor level to the threshold. If that had been in place then the door would have sat onto the threshold and not leaked in the same manner.

GerryWall

Thanks again you’ve been so helpful.