Landscape fabric, also sold as weed barrier fabric, slows weeds down by blocking the sunlight they need to sprout. It won't stop every one. It performs best under gravel or pavers, and it needs more upkeep under organic mulch.

It can work, with some upkeep. Overlap the seams and pin them down tight, then cover the fabric with about an inch of mulch. Dirt and mulch debris build up on the surface over time and weeds can root there, so plan on pulling the odd one by hand, and keep in mind that organic mulch can't work its way down into the soil through the fabric.

Yes, landscape fabric belongs under gravel or rock. It keeps stone from sinking into the soil and keeps soil from creeping up into the rock. Weeds can still show up over time, since dirt and windblown seed settle between the stones.

Most of them are rooting in the dirt and mulch debris that collects on top of the fabric. Windblown seed lands there and sprouts. Gaps and loose seams are the other way in, so overlap the pieces and pin them down tight.

Woven landscape fabric is made of interlaced strands. Non-woven is made of bonded or needle-punched fibers. Permeability and strength vary by product more than by type, so compare the permeability rating and weight on the label before you choose.

Landscape fabric typically lasts anywhere from 2 to 10 years, depending on the material and conditions. Weed control can fade sooner than the fabric itself because debris builds up on top. UV resistance helps.

Clear the weeds and level the soil first. After that, roll out the fabric with the seams overlapped and pin it down tight, because weeds will push through any gap. Finish with about an inch of mulch or a layer of stone on top.

For most beds, yes. Landscape fabric lets water through and plastic sheeting mostly doesn't. That's the main reason fabric is the better choice under mulch or stone.

That depends on the job. Under gravel or pavers you want a heavier, tougher fabric, and in planted beds you want one that passes water and air well. Compare the weight and UV resistance first, then read the warranty.

You can, though it takes some extra work. Fabric makes replanting and working in compost harder, and it can slow soil building over time. Paths between beds are a better fit.