The house I purchased has the dryer/washer in the basement laundry room. The basement is completely below ground level. The previous owners never vented the dryer outside and now I know why. Instead, they just vented it into the laundry room and placed a stocking over the end of the dryer hose to catch the lint.
A slate patio butts up right against the house. I measured exactly where the vent opening would come outside the house if I were to drill a 4 inch round hole and it would come out an inch or less above the slate patio - so this is not a viable solution. I should also mention that there is a window well on the cinder block wall directly behind the dryer but I do not want to vent out the window into the well as this would likely over time fill the well walls (more cinder blocks) with lint and look pretty crappy.
My other alternative is to run an extended length (maybe 15 feet) of 4" round dryer vent parallel along the floor/wall past the end of the patio and then out through the wall where there might be perhaps a foot of clearance off the ground (still not as much as I would like but better than no clearance).
Are there any other solutions I might investigate? I can't run a smaller diameter vent because of back pressure issues and such.
I am looking for any/all suggestions/comments.