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How to stop weeds coming through your decking

Read our guide on how to stop weeds coming through your decking. A deck is a great place to relax with family and friends. But weeds coming through your decking will drive you nuts.
So, how can you avoid getting weeds under your deck and losing your cool in the summer? All you need to do is a bit of planning.

5 tips on how to stop weeds coming through your decking

  1. Remove the grass. If your decking hasn’t been laid yet, remove or kill the grass in the area that it will go on. By doing so, weeds are less likely to become established and spread. Also, you’re less likely to have grass growing through your decking.
  1. Put down weed control fabric. Once you’ve removed the grass, the next step is to put down a layer of good-quality weed control fabric, such as Weedtex or Groundtex. It’s important to cover every inch of the ground where your deck will go. Leave a gap and it’s an open invitation to weeds to grow.
  1. Add an extra layer of protection. Once the weed control fabric is down and secured with landscaping pegs, the next step is to cover it with mulch or gravel. Put a good, thick layer down – both help keep the light out and suppress weeds and anything else that might grow.
  1. Wield the weed killer. Of course you might inherit a weed problem or not discover it until your deck is down. If this is the case, it’s worth getting the wield killer out and thoroughly treating the problem area. You will have to be persistent and it might take a while, but it could do the trick.
  1. Be vigilant. Whether you’re tackling the problems of weeds coming through your decking before or after installation, it always pays to keep an eye out for any weed growth and spend some time on a bit of maintenance around and below your decking if possible. Get to the weeds early!

Another tip for anyone dealing with weeds already growing through decking is to get the decking taken up. It might not be possible and it is a much bigger project, but once the decking is up, you can follow the first steps above and tackle the problem much more efficiently. If this isn’t an option, check out our top 5 tips for effective weed control.

Overall, it’s worth remembering that weeds can be maddeningly persistent and even the most thorough planning can sometimes come up short. But the more you do and the more you invest, the better the results will be.

We hope that the guide has given you ideas of  how to stop weeds coming through your decking.

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Latest News

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Deborah O.
We had a new gate installed and our double security gates made higher. The workman were friendly, efficient and the work was carried out to a high standard. We would highly recommend knight Fencing Michael & Debbie O'connor x
David J.
arrived when they said they would, did an excellent job, all at the height of the heatwave. Fencing looks great, going back to get them to fit a new driveway gate.
Marion S.
Very pleased with the service from Knight Fencing. From the visit to see property and receiving my quote, to the work carried out both men very polite and experienced . All work excellent.
Barbara P.
Knight Fencing fitted new gate posts and fencing around the front of our property. Excellent standard of work and the guys worked so hard in appalling weather conditions. Very impressed.
adrian H.
We had to replace our garden fencing and gate recently. Having looked at a few fencing companies and the reviews they had received, we chose Knight Fencing Ltd. It was an easy decision, from the moment we originally contacted them to discuss our requirements to completion of the works. Their professionalism throughout was excellent. There were many obstacles to overcome and these were considered and undertaken with no fuss. Whilst we had already chosen to use Jackson Fencing products, Knight Fencing arranged everything with them. The installation team were very professional, polite and considerate. We have no hesitation in recommending Knight Fencing Ltd.
John B.
This is the first time I have used Knight Fencing Ltd. I accepted a thorough quotation from their Contracts Manager Shane Hammond for the following. "To supply and install 7 linear meters of new 1200mm high green chainlink fencing to be joined in with an older existing chainlink fence complete with new green posts and end strainer concreted into the ground." The work involved the strimming of the boundary and the removal of part of an existing established tree. All the work was completed on one working day by Zac and Reece to a very high standard. All the old fencing, posts, garden waste and tree material were removed in a thorough and careful way. The garden was left in good condition. Zac and Reece worked very conscientiously and offered additional practical advice which I accepted. I believe the overall project was good value for money and would consider approaching Knight Fencing Ltd again in the future. John Blackwell.
Graham P.
Knight fencing installed a field gate for me, great service at a sensible price, would definitely use again. Recommended
Sam C.
Brilliant service and great quality. Will be using them again as required.
PotHoler A.
Always reliable and thoroughly professional.
Kathy G.
We have just had a close board fence constructed and found the company efficient, very nice to deal with and the men constructing the fence did an excellent job and were a credit to the company.

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Trusted, Accredited, and Committed to Excellence

Certified fencing contractor logo from the Association of Fencing Industries.
DuraPost Trained Installer
SMAS Worksafe preferred supplier
Postsaver Approved Installer
AJS Training
Constructionline Gold Member
CLD approved installer
Checkatrade.com members
CHAS accreditation advanced
Alexandra recommened installer
Trustmark logo indicating government-endorsed quality standards.

Helpful Guides

  • A Guide To Security Fencing
  • A Guide To Product Finishes
  • A Guide To Fencing & Your Boundary Rights
  • Free Guide For School Fencing For Specifiers
  • Guide to Sports and Spectator Fencing
  • Guide to installing timber gates
Knight Fencing
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Based on 82 reviews

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News, Tips and Advice

  • Women in Construction: Celebrating the Team at Knight Fencing
    Women in Construction: Celebrating the Team at Knight FencingMarch 11, 2026 - 3:49 pm
  • Knight Fencing team member working in waterlogged, muddy ground conditions during a winter timber fencing installation
    Professional Fencing Installation West SussexFebruary 27, 2026 - 1:01 pm
  • Before and after of a free timber gate installation for a local resident by Knight Fencing Ltd
    Community Support ChichesterFebruary 24, 2026 - 12:59 pm
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Knight Fencing
4.9
Based on 82 reviews