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Weed Fabric Calculator

Calculate how much weed fabric you need including overlap

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๐Ÿ‡ฉ๐Ÿ‡ฐ All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Calculate weed fabric for your garden

Our weed fabric calculator helps you determine the right amount of weed fabric for your beds, paths or under paving. The calculator accounts for overlap between strips and recommends 10% extra for waste and fitting.

Overlap between strips

When laying weed fabric, it's important to overlap strips by at least 10-15 cm to prevent weeds from growing through the joints. A 15 cm overlap is the standard recommendation. In areas with heavy weed pressure, increasing the overlap to 20 cm is advisable.

Types of weed fabric

Several types are available: thin woven fabric (affordable, lasts 2-3 years), heavy-duty woven fabric (lasts 10-15 years) and geotextile (for under paving). For planted beds, choose fabric that allows water and air through. For paths, denser materials can be used.

Installation

Level the ground before laying. Secure the fabric with landscape pins approximately every 50 cm along edges and overlaps. Cut cross-shaped holes for plants. Cover with bark mulch or gravel for a neater appearance and longer durability.

Frequently Asked Questions

How much overlap should weed fabric have?

An overlap of at least 10-15 cm is recommended to prevent weeds from growing through joints. 15 cm is standard. In areas with heavy weed pressure or under paving, the overlap can be increased to 20 cm for extra security.

How long does weed fabric last?

It depends on the type. Thin woven fabric typically lasts 2-3 years, heavy-duty woven fabric 10-15 years, and geotextile can last 20+ years. UV-resistant fabric lasts longer in direct sunlight. Fabric covered with bark mulch or gravel generally lasts longer as it's protected from UV radiation.

Should you put weed fabric under bark mulch?

Yes, placing weed fabric under bark mulch in beds is recommended for optimal weed suppression. The fabric prevents weeds from germinating from the soil, while the bark mulch protects the fabric from UV radiation. Together they provide the best and most durable weed control solution.

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