Water pooling in the DPC of timber frame

[Tentontousand]

Currently building a timber frame extension that's sitting on block work. We have DPC that the frame sits on between the block and the frame but started seeing pooling of water coming through. We've got housewrap on and render boards right now but rain water is still getting through... Any thoughts on why this is happening? You can see the water pooling on the inside.

 

[freddiemercurystwin]

Don't know what's going on in that photo or from your description, post some better photos and make your post clearer. Perhaps a sketch showing the detail of the wall make-up and how the membranes are layered.

 

[conny]

Is that OSB being used as the frame or is that just a temporary boarding over to keep out the elements?
Was the wrap applied working from the bottom, so each upper layer overlaps the lower by a minimum of 4", (preferably 6").
If it's been wrapped from top to bottom then water will run between the overlaps.

 

[Tentontousand]

Is that OSB being used as the frame or is that just a temporary boarding over to keep out the elements?
Was the wrap applied working from the bottom, so each upper layer overlaps the lower by a minimum of 4", (preferably 6").
If it's been wrapped from top to bottom then water will run between the overlaps.

That's actually a photo from the inside of the extension. The house wrap house outside has been wrapped from bottom to top. Was the DPC meant to be folded behind the housewrap?

There's also renderboard on the outside at the moment

 

[Tentontousand]

Don't know what's going on in that photo or from your description, post some better photos and make your post clearer. Perhaps a sketch showing the detail of the wall make-up and how the membranes are layered.

Sorry that's a photo from the inside. I'll explain from inside to out from what we have installed at the moment. Currently it goes;

Vapour barrier
Framing with the celotex insulation
OSB boards
House wrap overlapping from bottom to top
Battens
Render carrier board

The timber frame is sitting on block with the black DPC in between. We currently have no gutters so the waters running straight down the face of the wall and collecting in the DPC from the outside.


You can see in this previous photo how it is before we added the carrier boards.

 

[freddiemercurystwin]

It's not much clearer tbh, once you add the gutters that will prevent water running down in between the frame and the render boards won't it? Are you just making this up as you go along or are you following any drawings?

What does this mean? 'House wrap overlapping from bottom to top'

 

[Tentontousand]

It's not much clearer tbh, once you add the gutters that will prevent water running down in between the frame and the render boards won't it? Are you just making this up as you go along or are you following any drawings?

What does this mean? 'House wrap overlapping from bottom to top'

We have some temporary gutters but I don't think it's doing a good enough job it seems.

Nah not making things up as we go along, builders have been following the typical timber frame build process but there seems to be an issue with water tightness from the DPC section.

Housewrap from bottom to top means it was installed from bottom of wall first then overlapped as we work up the wall which in theory should be stopping any water seeping between the housewrap membrane