While white fencing isn't for me in a back garden, I have seen loads of pics here on Houzz with white fences and, although they mostly seem to be over in the USA (let's face it - they tend to have better daylight in parts of North America than we do in the UK) I do like the look of it, though. I especially like the whitewash appearance if you're going for a Cottage Garden as it adds a weathered appeal. I went for black in my garden which looks pretty stylish, especially with the greens and whites in front of it. I used to live in a house with a roof terrace and we were advised at the time to not use white on the inside of the parapet walls as it would glare too much. The chosen option for the wall was pale grey (before it was fashionable) and it worked really well. For this reason, I wouldn't have gone for white fence or white furniture.

Gates and Fences UK thank you so much for your advice, in the end I've taken it and today I've ordered Red Cedar Cladding and I'm going to treat it with cedar oil as you suggested. I think having to coat it yearly will be well worth the effort to have the beauty of Cedar as opposed to the practicality of UPVC Cladding.

Our Cequence fencing panels can easily be attached to an existing fence to give an instant impact to your garden area. We make the panels bespoke widths to suit your space so that the panels fit perfectly. The panels are made from Western Red Cedar the look and smell amazing!

Yes fill the void with insulation and breathable membrane and clad over the top can you for see any issues with doing that