How to Kill the Grass Under Your Deck
LESLIE: Alright. Now we’ve got Warren on the line who is building a deck in his yard. How can we help you with that project?
WARREN: Well, I appreciate you taking my call. We’re building a 12×12 deck over the grass in the backyard. And I don’t want to be – it’s only going to be about 18 to 22 inches off the ground – and I don’t want to be worrying with the grass underneath the deck, about growing and everything. What can I do to stop that grass from continuing to grow underneath the deck?
TOM: Well, a couple of things. First of all, you could spray all of the grass with Roundup before …
LESLIE: Just kill it.
TOM: Right. Just kill it off before you build the deck. Then secondly, after the deck is done, you can spread some mulch down there. And between that …
LESLIE: And would you want to use weed blocker right below that?
TOM: I guess you could. You could probably lay some weed block down and then put mulch over it and that ought to do it. And since it’s only 20 inches off the ground, the hot ticket would be to do this after you frame it but before you deck it.
LESLIE: Yeah. Just pour it right through.
WARREN: Ah, yeah.
TOM: Alright? Because that’s when it’s easiest to work around it.
WARREN: How long would it end up – kill it?
TOM: It’s one shot does it.
LESLIE: It’s not coming back, yeah.
TOM: Just be really careful, because it gets right into the plant; plant itself. It gets down to the roots. Just be careful of overspray or you’ll end up killing the grass on the other – where the deck is not going to be and that’s not what you want to have happen. So be careful, especially if it’s windy out when you spray this stuff.
WARREN: Well, I’ll wait until it’s not windy.
TOM: That would be the idea.
WARREN: And I appreciate it. I thought I’d have to dig up all that grass and things.
WARREN: I really appreciate it. I love the show.
TOM: Oh, you’re very welcome. Thanks so much for saying that.