Raised bed against a patio wall. Should I leave a gap ?

[Jexf]

Hi

Sorry to confuse. I will be errecting a raised bed from sleepers up against a wall of the house which is part of the patio. Only the face will be sleepers because of limited patio space. The back of the bed will rest against the wall. Thinking about it now I will line the back face with something ? in order to not have soil touching the wall itself. My question was should I leave a gap for the wall to breath or is it ok to butt up against the brickwork ?

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I am planning to build a raised bed using sleepers 2.5 long and 3ft high against our patio wall which is cornered to the house. Should I leave a gap to the wall ?

If not necassary then should I line the wall before so the soil is not not touching the brickwork ? What can I use to line the wall and allow it to breath if required ?

Thanks

 

[r896neo]

hi, sorry i am having trouble understanding exactly what 'patio wall cornered to the house' means?

Could you take a picture or do a basic sketch? of the existing walls and proposed new ones?