Accoya cracking in the sun?

[Doug71]

Made a large door and frame out of Accoya which I fitted today, it's in a south facing courtyard that is a real suntrap.

While I was fitting the frame the door was just lent against the wall in the sun, when I came back to the door quite a few hairline cracks had appeared in the stiles, I moved the door out of the sun and the cracks seemed to close up.

I am a bit worried as I recommended Accoya as the door gets lots of sun I said it would be more stable.

The door was primed with Dulux aluminium primer and had a topcoat of Dulux ultimate Opaque in a light green colour, Dulux technical told me this would be fine.

Anybody else come across Accoya cracking in the sun, I thought the whole idea was it didn't do things like this?

Doug

 

[ColeyS1]

I'm glad I saw this. I've never used it yet but thought the same as you. I've used tricoya sheets a lot and that doesn't move at all. Was it just one piece of wood that split or all of it ?

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[doctor Bob]

No help but an observation. My windows are accoya and some face full sun, been in 2 years and no sign of cracking, these were finished in a technos paint.

 

[Doug71]

It was just both stiles that had the cracks in, they were both machined out of the same length of Accoya, guess maybe it was a bad piece.

I have never had any problem with it in the past, typical that it happens on a big job that is in full view.

Saw this nice little project on the Accoya website :shock:

https://www.accoya.com/projects/project ... -kentucky/

I will contact my supplier today and see what they have to say.

Doug

 

[Doug71]

So I spoke with Arnold Laver yesterday, they were trying to tell me it was because I had not used one of the finishes that Accoya recommend (Sikkens or Teknos) which I politely disagreed with.

I asked them for the phone number of a rep from Accsys (who produce Accoya) and gave him a call.

He was very helpful and knowledgeable. The finish I had used was fine, the problem was with the Accoya. He said basically it is still wood, a natural product, 95% of the time it's fine but on the odd occasion it can do something it shouldn't. Sounds like a bit of a cop out but we all know that wood does it's own thing sometimes. He said to keep him informed and he would standby whatever I wanted to do (whatever that means).

I will go and look at the door in a few days to see what it's like.....

 

[ColeyS1]

Did it have 4 coats of paint ? 2 aluminium and 2 top coats ? The top coat you used sells it self as being flexible as well doesn't it? It's almost like they didn't dip that piece of timber long enough....

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