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Jane finds her garden:brick wall question
"martin" wrote in message news On Sun, 30 Nov 2003 09:24:01 +0000 (UTC), "Franz Heymann" wrote: "Philip" wrote in message . .. "Jane Lumley" wrote in message ... Thanks so much to all for your help - we've found a house with an acre of land.... but I'm not saying any more in case one of you gazumps me! . Thing is, said acre is currently rather exposed to wind and traffic noise, so dh and I are eager to make a walled garden by building brick walls around at least part of it. Are we mad? I've looked at several websites and the art of bricklaying seems very jargon laden. Does anyone know of a site in plain English? And has anyone ever done one of those night-school bricklaying courses? -- Jane Lumley I am not quite replying to your exact question but hopefully, I will add something of use here. You mentioned that the site was exposed to wind, and you were proposing to build a wall. Well its just that walls are not that good a acting as wind breaks. The problem is that the wind hits your wall and is diverted up and over. The results is lots of eddys and a more buffetting effect on the leeward side of the wall. A tall hedge on the other hand filters the wind. The wind hits your hedge and is slowed down by the branches twigs and leaves. In these circumstancs the leeward side of the hedge would be a more peaceful place than the leeward side of a wall. And that is not just a legend. I had a book (where is the damn thing?) with test results from research on hedges and walls as windbreaks. A hedge provides wind shelter for more than twice as far downwind than a wall of the same height. It's a bit like the difference between a solid break water/sea walls and barriers of large loose rocks, now so popular in North East England's sea defences. The first diverts waves and the second absorbs waves. Yes. Identical principles. The principle of least efficient fluid flow - to - mechanical energy conversion. Franz |
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