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how to stop weeds from growing under deck

How to stop weeds from growing under deck

You can also use rocks, bricks or anything heavy to keep everything close to the ground. Sand is heavy and offers drainage so you will not get puddles and a lot of runoff when it rains.

Cut your weed barrier into sheets and overlap by 2 feet or cut a sheet big enough to cover the decking.

I then cover the weed barrier with sharp sand so there is no room for weeds to grow and take hold underneath the weed barrier.

You can just use a salt or weed killer mix and that area will not see any weeds for many years. But this method will do more harm than good once it starts to spread around the garden and onto the lawn and the flower beds.

Fitting Your Weed Barrier

Because the boards have been installed in can be hard to spread out the weed barrier underneath the decking boards.

Here is the method we use when installing a weed barrier under an installed decking.

If your decking has already been installed then you can still use a weed barrier.

Installing A Weed Barrier

Once you have pulled the weed barrier to the back of your decking you should use some tent pegs to hold it in place. Continue doing this until you have covered the area under the decking. Remember to overlap the weed barrier by 2 feet.

Some installers will cover the area in a salt mix or use enough weed killer to destroy the soil for many years.

Spread Landscape fabric and cut it to fit around plants. Photo by Saxon Holt

Fertilize Enough, but Not Too Much

You can also use landscape fabrics to control weeds under decks and in pathways (spread over the excavated soil base before you add gravel or sand). A 3×50-ft. roll of landscape fabric, such as the Typar shown below, costs about $10. The fabric is also available in 36-in. die-cut circles (about $3 each) for installing at the base of trees.

Can I Put Landscape Fabric Over Weeds?

Think it’s an overstatement to call it the war against weeds? Here’s what you’re up against.