Invisble gaps

 

 

 

 

 

This wall had some serious problems with water entry around the door so all the cladding had to come off

 

 

 

 

 

 

 

 

 

But when the lower part came off, apart from the obvious decay around the door, there was also some more half way along, just under the horizontal band ....and no obvious explanation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

There were no cracks above this area, and no joint in the horizontal jointer - no clue, as yet......

 

 

 

 

 

 

 

 

But the decay was quite advanced, where on earth was the water getting in????

 

 

 

 

 

 

 

 

 

 

 

Still don't know, so the top part of the cladding was removed, slowly....

 

 

 

 

 

 

exposing just the building wrap to start with. The first thing you notice is that there was a vertical joint in this area.....

 

 

 

 

and the paper is all wrinkled behind that joint, indicating water

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The back of the fibrecement has bits of the disintegrating buillding paper stuck to it....

 

 

 

 

 

 

 

 

 

 

And the truss behind is also rotted....but none of this explains where the water is getting in????

 

 

 

It must be from higher up......

 

 

 

 

 

 

 

 

 

Where the decay fungi is flourishing, but still no sign of where the water is getting in...a hole in the roof, maybe?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Finally, the explanation : the fascia (that sloping bit of flat board) was nailed onto the naked fibrecement before the joint was plastered...

so there was a gap between the two sheets of fibrecement up behind the the fascia that was never filled - water blew in there, then ran down the back of the fibrecement, soaked through the building paper and initiated decay in the untreated framing.

We couldn't even see that gap, or that the plastering all stopped at the bottom of the fascia, until we prised it out. So easy to miss things!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Photos

A selection of photos of remediation related issues.

This page Fibre cement, see also

Apron flashing ends

Misleading moisture content readings

Decks

and Stucco

Fibre cement

There are a variety of problems with fibre cement. I have come to the conclusion that it simply doesn't work when direct fixed to KDUT (Kiln dried untreated framing). This is just one example of how a mistake so small it was literally invisible led to serious decay.

Apron flashing ends

Decks

Stucco

Misleading moisture content readings