Asked by: Davy Chrestensen
home and garden landscaping

What to put under a deck to prevent weeds?

Last Updated: 18th January, 2020

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Gravel installed over a layer of fabric or plastic sheeting helps keep weeds in check and prevents the plastic or fabric from blowing out of place. This type of installation can also prevent wildlife from burrowing into the ground and creating homes in the space beneath your deck.

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Similarly, it is asked, what is the best material to put under a deck?

If the area under your deck or stairs will collect water or is prone to gathering moisture, an inorganic mulch such as gravel, crushed rocks or river rocks is best. Gravel is a good material to place under outdoor structures, because it allows water to drain and doesn't decompose.

Also Know, should you put landscape fabric under a deck? It's also needed under decks, patios, and other hardscapes. “Landscape fabric has been an especially helpful alternative for us under decks,” says Berg. “We used to put stone down to keep weeds from growing. Now we just put down the weed barrier, add a little weight on it, and staple it down.

Additionally, how do you prepare the ground under a deck?

Preparing Deck Site Checklist

  1. Layout the shape of the deck with a hose or string and remove any sod.
  2. Ensure there are no underground services in the area where you will be digging.
  3. Locate the positions of the piers and footings.
  4. Dig the holes for the footings and piers.
  5. Prepare the soil with landscaping fabric.

Do you need to put gravel under a deck?

Purpose. Most deck installation companies recommend using gravel when installing a deck. Gravel provides ample drainage and prevents pools of water from lingering below the deck structure after it rains, and eroding the wood structure and foundation.

Related Question Answers

Waltraut Tuporshin

Professional

Should you put plastic under a deck?

Weed Control
Leaving the area below your deck uncovered can allow weeds and other plants to sprout, eventually pushing up between the deck boards. Gravel installed over a layer of fabric or plastic sheeting helps keep weeds in check and prevents the plastic or fabric from blowing out of place.

Maricela Fardi

Professional

What do you put under moisture on a deck?

Sloping Bricks or Cement. The soil under your deck will soak up as much water as it can, but when it becomes saturated, the water pools. Prevent this by laying bricks or pouring cement under the deck. This area should slope away from your home, allowing the water to easily run off into the rest of your yard.

Chasity Iraola

Professional

Can you lay decking on soil?

There are two ways you can lay decking on grass. Use a flat surface (a decking board or tamper is perfect for this) and place a spirit level on top to check the ground is even. If the spirit level indicates the ground is uneven, level it out with extra soil or compact the soil to flatten it out.

Riana Vitt

Explainer

Is plastic or fabric better for landscaping?

Weed control is a major concern for gardeners, and landscape fabric or plastic can help block light and nutrients from reaching weed seeds in your soil, preventing them from growing. The fabric is more porous than the plastic, allowing moisture to penetrate, while the plastic causes most of the water to run off.

Denes Leyssarrague

Explainer

What should I do under my deck?

8 Under-Deck Design Ideas to Fill Your Empty Space
  1. 1) Add Lattice as a Deck Option.
  2. 2) Skirting.
  3. 3) Build a Shed Under the Deck.
  4. 4) Build a Patio Under Your Deck.
  5. 5) Add a Patio Swing.
  6. 6) Cover the Ground in Weed Blocker Fabric and Gravel.
  7. 7) Create an Under-Deck Play Area for Children.
  8. 8) Completely Finish the Space.

Percy Uli

Explainer

Does landscape fabric allow drainage?

Landscape fabric is a material placed around trees, flowers or shrubs to stop weeds and promote plant growth, without chemicals. Landscape fabric blocks weeds, but its permeability allows the proper balance of air, water and nutrients into the soil.

Enoelia Zorzan

Pundit

Can you lay decking on gravel?

If the area is not well drained, or if you simply want to give the timber deck frame something a bit more solid to sit on, place paving slabs at all of the corners and at intervals along the middle of the deck area. These can sit on top of the gravel base and will act as basic foundations for the frame.

Danyel Arealdegui

Pundit

Should I put a vapor barrier under my deck?

Do not install a vapor barrier beneath the deck. Water vapor from the soil can cause severe cupping of the decking. The underside of the decking boards readily absorb moisture that evaporates from the soil.

Dochka Baydal

Pundit

How high should decking be off the ground?

Generally, if a deck is less than 12 inches above the ground, the perimeter of the deck must be open for free air to flow below the deck.

Hamady KowaleĊ„c

Pundit

Can I use deck pier blocks instead of footings?

A deck pier block is in many ways just a simplified version of a “precast foundation”, a foundation type recognized by building codes. They're subject to all of the same requirements as a typical footing, regardless of not being cast-in-place. The small bearing area of pier blocks is limited in supporting much load.

Tyler Radlbrunner

Pundit

Does a deck add value to a house?

Homeowners who installed a 16-by-20-foot pressure-treated wooden deck onto their house recouped an average of 85.4 percent of the cost of the project. On average, a deck which cost $10,347 to build added $8,835 to the value of the home when it was sold [source: Remodeling].

Rajaa Blakey

Teacher

Should I remove grass under deck?

Removing the soil or grass from below your deck may seem a good idea, but this leads to drainage problems. The grass may eventually die off due to lack of sunlight filtering through the deck, but the remaining topsoil still drains water faster than if you dug out the entire area.

Yudy Irwin

Teacher

What kind of rock goes under deck?

Crushed Gravel
Easily the most common option for use under decks as well as for most other outdoor applications, crushed gravel is widely available just about everywhere rock is sold. There are different types of gravel out there, but the term “crushed gravel” usually refers to pea gravel.

Yacouba Musa

Teacher

How much does it cost to build a 20x20 deck?

An entry level deck with basic materials costs $15 per square foot, while a deck built with premium materials costs $35 per square foot.

Cost To Build A Deck By Size.
Deck Size Square Feet Average Cost
20x20 400 $6,000 – $14,000

Ilies El Fassi

Teacher

How do you clean under a low deck?

To prevent the mold, mildew and algae from returning, all you have to do is spray the underside of the deck with an oxygen bleach solution two or three times a season and rinse. If you periodically apply the oxygen bleach so that you don't get heavy deposits, you'll never have to scrub again!

Jerome Pic

Reviewer

Do decks need ventilation?

This is why proper ventilation is essential. In order for wood to be able to move evenly, it must have good airflow across all four sides. Proper airflow will also keep the bottom of your boards dry. Without it, the top will be dryer than the bottom, which will cause cupping.

Edgard Sanchez Paniagua

Reviewer

Will grass grow under a deck?

Unfortunately, your deck can become a source of frustration if grass starts growing up to the deck from underneath it. With a bit of planning, though, you can stop unwanted grass from growing under your deck and possibly improve the overall look of your yard in the process.

Acracia Quertier

Reviewer

How do I keep mice away from decking?

3 Tips For Preventing & Deterring Rats Getting Under Your Decking
  1. Tip 1. When building your deck, add strong chicken wire all the way around the bottom of the deck.
  2. Tip 2. Rats will live under your decking if the conditions are right.
  3. Tip 3. If you see any signs of gnawing or activity, get your traps down early.

Tracie Atxurra

Supporter

How do you install spotted gum decking?

This is how you use spotted gum for your decking project in just several steps:
  1. Plan how much spotted gum decking timber you need.
  2. Measure and cut the spotted gum timber, as well as the rest of the planks.
  3. Build the footing and posts.
  4. Position joists and bridging.
  5. Use spotted gum to lay the decking on the joists.