Jointing sand is touted as a miracle cure for weeds in the joints between paving stones. But can you get rid of the weeds from the paving stones forever with it? Which grain size should be used? And how is joint sand against weeds applied correctly? We answer the most important questions.
Table of contents
- Why does joint sand against weeds work so well?
- Which sand to use against weeds in the joints?
- Correctly use joint sand against weeds: Instructions
Why does joint sand against weeds work so well?
Admittedly: Weeding is a tedious task. Home remedies like vinegar and salt work well, but are harmful to garden soil. Chemical weed killers can stain pavers and should be used with caution in the garden.
1. quick and tedious method of weed control.
Joint sand offers a tedious and quick solution to the problem. The mixture of fine quartz sand or granite and low-nutrient materials is extremely hard and compacts optimally. It has a high pH and, like desert sand, can inhibit plant growth. Weed seeds have no chance and cannot take root there.
2. permeable, ecologically harmless and with excellent compaction properties.
Its fine grain size makes it ideal for the narrow joints between pavers on the patio or garden path. At the same time, joint sand scores with excellent permeability – allowing rain and melted snow to drain away easily. It is also ecologically safe, contains no pollutants and has no effect on groundwater, garden soil and other plants in the garden.
3. conceivably simple application, both on new, as well as on already existing pavements.
The application of the dry material is also conceivably simple, the sand is simply swept into the joints. Thanks to its easy processing, the sand mixture is perfect for narrow and wide joints between concrete or natural stone pavers on the garden path , terrace and even in some circumstances the driveway. At the same time, it can be used both when laying surfaces, and on existing flooring.
Which sand to use against weeds in the joints?
A low-nutrient joint sand that inhibits plant growth proves to be optimal. Plants simply cannot root through in the fine, round sand. The self-hardening variant can improve the stability of the pavement and is particularly suitable for driveways or other infrequently traveled surfaces. For patios and garden paths, conventional jointing sand is more suitable. This allows rainwater to drain away and the pavers to expand at high temperatures.
When choosing the right quality of sand, you should pay particular attention to the grain size. The rule of thumb is: the narrower the joint, the finer the sand.
Dansand joint sand is inspired by nature
In the vernacular, joint sand and Dansand are often confused. Dansand is actually a product of a Danish company that mixes quartz sand and mineral additives. The edges of the single grains are rounded by machine
Which is better: joint sand or quartz sand?
For now, the joint sand is basically a quartz sand to which you add stone powder and other minerals. The quartz sand can perfectly fill even narrow areas and can be swept in without much effort. In this respect, it is a good choice for the joints. However, if you want to kill weeds and inhibit their growth, you should choose joint sand. Its high pH makes it impossible for plants to root through. In addition to this, the grains are also rounded, which makes it impossible for seeds to germinate. Weeds simply cannot find a foothold in the joints and grow there.
Self-hardening joint sand against weeds as an alternative to cement
Unlike conventional joint sand, the self-hardening variant is used as an alternative to cement. It is still permeable, but can also be cleaned with a high-pressure cleaner. The application is similar, first wetting the work surface and then sweeping the sand into the joints. At the end, the sand is compacted with a joint iron and then needs about 12 hours to harden. Temperatures should be between 10° and 20°, although the colder it is, the longer the curing time.
Use jointing sand properly against weeds: Instructions
1st use: Only on dry pavers laid on a water-permeable base course and only outdoors. In case of bricks, clinkers and porous pavements, be sure to seek advice before buying. The processed surface must not be adjacent to a base. The joint width can vary between 1.5 mm and 5 mm. The joints should be at least 45 mm deep. 2.
2. before application, be sure to weed already growing weeds or destroy them without herbicides and remove the plants along with their roots. In the case of already laid coverings, thoroughly clean and sweep the joints. 3.
First mix the material well so that the quartz sand mixes well with the minerals. 4.
Then sweep the joint sand into the joints with a broom and fill them up gradually. Remove or sweep the excess material from the pavement.
5. compact the joints with a vibrating plate with a rubber plate mounted.
How often to sweep in joint sand?
To prevent weeds from spreading again, keep joints regularly clear of soil and other organic materials such as fall leaves, grass clippings, needles. These can usually be swept off with a stiff broom. After that, you can sweep in the joint sand. How often you do this depends on several factors. If the garden path is windblown and natural stone, you will rarely need to replenish the joints. On the other hand, if the garden path is exposed to strong wind, rain and snow, you will need to refill the joints more often.