Replacement Windows in a timber clad property Q about fitting

[Mike13]

Hi,

As title recently had the timber windows replaced with PVC, the old ones were very old and the opening and closing bits did not let them seal etc, so replacements were needed.
The fitter who put them in told me he had some timber building experience..
Anyway the house had an external insulation upgrade, tyvek facing, then battens and larch cladding.
The fitter siliconed everything on the cladding, I think that is wrong as it is designed for water to run down to the bottom and dry off. the silicone would eventually allow water to be held next to th timber cladding.
Any strong views one way or the other on this?
The waterproofing would go on the part where it ties into the main structure, and in front of the battening is expected to breath is my understanding.

 

[freddiemercurystwin]

You need to show us (or ideally draw a section through the jamb and the head and cill) how the cladding has been fixed around the existing windows.

 

[Mike13]

Hi,
I have had to take a bunch of pics before it got too dark and edit them to besmall enough to upload.

This is guaranteed to hold the water against the cladding and stop it drying out between the rains.

Ditto for the other side:

Notice that there are small cracks in the timber, water that enters there will be held tight by the silicone.

This one is only maybe ok, it is the battens that support the cladding that are siliconed to the outer framing piece:

Now at the top of the frame we have battens to support the cladding, and the uprights thatthe cladding is nailed to, he has siliconed the gap there so that sections of the cladding are now without ventilation, one pic has a pencilled in line showing where the silicone is, on the other one I edited the brightness.

The translucent silicone is visible sort of.

Do the pictures help?

 

[Mike13]

And I went out again to check,
There is a large gap where the new sill profile is slimmer top to bottom, there is a huge bead of silicone stopping any ventilation in the sections of cladding below the frame.