Founded in 2008. The Landscape Juice Network (LJN) is the largest and fastest growing professional landscaping and horticultural association in the United Kingdom.
LJN's professional business forum is unrivalled and open to anyone within within the UK landscape industry
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For the researching visitor there's a wealth of landscaping ideas, garden design ideas, lawn advice tips and advice about garden maintenance.
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Oak is better and suppliers say they need not be treated, however i bitumen paint the back of mine. You could also backfill with peashingle as you would for a brick retaining wall for drainage.
Tanalised sleepers you will be lucky to get 5 years out of them. Oak last much much longer!
Another benefit is no tar if walking near by, so cheap compared to new carpets!