|Home » Forums » Professional Finishing » Message||Login|
You are not logged in. Consider these WOODWEB Member advantages:
Sealing Planter Boxes9/28
I recently built some custom 2x4x8 cedar planter boxes which we lined with plastic bag material to prevent leaking.
I was thinking I could build them and pour a hot roofing rubber inside them to seal the wood.
Question: will this rot the cedar from the inside out? What the best way to line a planter box and cheapest of course?
The water needs a way to get out. If it gets trapped anywhere it will eventually rot the wood. Roofing tar is good, but it may develop an unbalanced panel effect and the wood may warp. Can't say for sure.
If you do it, make sure it is done well and that water can still get out. A tray on the bottom or something may help.
Otherwise an exterior epoxy would work, but that's not an inexpensive solution.
Does that mean it is 2' deep? Does it just sit on the dirt? Is it for vegetables or flowers? 2' of dirt is a ton for flowers. I'd fill it half full of rock, rock against the sides, rock under the planter, then just let the water flow away from the wood.
Believe it or not...
I slapped together some cedar(12x12x36) window planter boxes. I was busy as hell so I primed them with BIN primer and installed them. My wife was supposed to topcoat them, but never got around to it. I left those with wet dirt in them for two full years with the BIN on all 6 sides.
They were still perfect, when I finally got around to cleaning them and topcoating.
Make sure you drill a bunch of decent sized drain holes.
I think the key is to use a sealer.
Sounds like the rubber would work. The boxes are 10x60x34 tall. We did put plenty of drainage holes in the bottom. Lined it with doubled up plastic bags. I think the rubber would be easier and better than the plastic bags.
They have a rubber sealant in a spray can I have seen on TV. It's the one a boat has a screen door on the bottom with the screen sealed with the product. Not sure what it's called but it's probably costly.
Flex Seal !!!
Of course, there is a Window Box Liner.com on that interweb thing.
A metal liner is the premium way to do it, so things will last. Solder or epoxy or silicone drain tubes as needed to pass thru the wood.
There is a big difference between a $40.00 box nailed under a window and a designed, bracketed, lined and drained WRCedar window box at about $750.00
Window Box Liner.com