Eurocell Coastline Vertical vs Horizontal cladding

[gardenque]

Hi everybody. This is my first post, so please be gentle....

I have a bungalow with a dormer running across its full length. The two-room dormer was built in 1985 and now the wooden cladding and the windows both need replacing. I was intending to have it clad in Eurocell Coastline composite cladding but here I become confused.

According to the installation guides, only masonry buildings are suitable for Coastline Vertical cladding. Coastline Horizontal cladding is apparently used for a wooden building (so presumably the same goes for a wood-framed dormer). The horizontal cladding however is shiplap, whereas the vertical cladding is a flat profile, which I much prefer. (There is a more expensive Eurocell cladding called Forma, which, according to the installation guide, can be used either vertically or horizontally on wood or masonry - I think!)

I don't understand why the Vertical Coastline should only be used on masonry buildings and not wooden ones. Both Coastline types (V and H) have a guarantee of 10 years and the Forma has a guarantee of 25 years, so I'm assuming the more expensive Forma has something the Coastline lacks. It's more expensive anyway, so that would seem to explain the difference in guarantee length. All Eurocell's cladding installation guides state that if the correct applications are not followed, then the guarantee could be invalidated. (Not ideal, as I'm sure you'd agree!)

Can anybody cast any light on this? Am I missing something blindingly obvious? I would much appreciate any thoughts. Thank you.

 

[jj4091]

Perhaps the manufacturer or a supplier might be the best people to ask. Do they supply any technical specifications for the product.

 

[gardenque]

They do provide these in the installation guide but I can't really see what difference it makes. The weight of the composite panels is the obvious clue, I'd have thought. I shall get on to Eurocell and see what they have to say. Thank you for responding so quickly.

 

[^woody^]

Boards fitted horizontally, are typically a true rainscreen and keep the weather away from the structure.

However boards fitted vertically - even if the very same ones, do not acheive the same levels of performance and so can not be relied upon to protect the structure without other design precautions.

 

[jono_h]

The Eurocell Forma range is actually an Ecoscape product that I was going to use. For boring reasons I ended up using a near identical product from Envirobuild - Hyperion Slatted Cladding. No issues installing over timber or masonary vertically and considerably (around 40%) cheaper.

 

[gardenque]

Thanks everybody. I'll dig around a bit and get back to you.

 

[gardenque]

Hi everybody. Well, I looked at a few other suppliers' vertical composite cladding and they all assured me that it was fine to use it on wooden buildings.

Eurocell, manufacturers of Coastline Composite vertical cladding, responded to my email enquiry by saying that their vertical cladding has not been fire tested. As far as I can see though, their horizontal (shiplap) cladding has a similar spec, hence the confusion about use of their vertical cladding on wooden buildings.

Eurocell have said that "in this case should not pose a problem" and have assured me that the 10-year guarantee will still stand - although their installation guide says it won't (presumably until it has been fire tested).

So now I can get quotes for vertical and horizontal cladding.

Hope this might be useful for anybody in a similar position.