SRW NW4.5 Non-Woven Drainage and Filtration Fabric
The French Drain Fabric That Never Clogs the Job
A 4.5 ounce needle-punched non-woven geotextile that lets water pass while holding soil back, which is the whole job of a drainage fabric. Wrap it around French drain aggregate, hang it behind retaining walls, or lay it as a separation layer so your clean stone never disappears into the mud below it.
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Why Contractors Ask for NW4.5 Non-Woven Drainage and Filtration Fabric by Name
Skipping fabric is invisible on install day and expensive later: drain rock silts shut, base disappears into mud, and the fix means digging it all up.
- High water flow with excellent soil filtration.
- Needle-punched non-woven, 4.5 oz per square yard.
- Rot and mildew resistant, dimensionally stable.
- Cuts cleanly with a utility knife.
Where NW4.5 Non-Woven Drainage and Filtration Fabric Works
NW4.5 Non-Woven Drainage and Filtration Fabric is recommended by SRW Products for drainage and separation work:
- French drains
- Behind retaining walls
- Erosion control
- Separation under aggregate
Installation at a Glance
The full step by step guide is in the official TDS below. Here is the shape of the job:
- Excavate. and compact the subgrade or trench.
- Roll. the fabric out with several inches of overlap at seams; for French drains, line the trench with enough fabric to wrap over the top of the stone.
- Pin. edges and seams with landscape staples.
- Place. aggregate and build as normal.
Always test in a small discrete area first.
Quick Answers
Woven or non-woven?
Non-woven for drainage and filtration: French drains, behind walls, around stone. Woven for strength under base and traffic. If water flow is the job, you are in the right place.
Which weight do I need?
The number is ounces per square yard. 4 to 4.5 oz covers residential drains and separation, 6 to 8 oz for rock placement, 10 oz and up for commercial abuse.
Will it clog?
Needle-punched non-wovens are made to pass water while holding soil. Sized correctly they run for decades, which is why drainfields specify them.
Is there anything I should know about handling it?
Wear gloves and eye protection, follow the label, and keep it away from children and pets until placed or cured. Full precautions are in the SDS below.
Official SRW Products Documentation
Download the NW4.5 Non-Woven Drainage and Filtration Fabric SDS (PDF) โ
Download the NW4.5 Non-Woven Drainage and Filtration Fabric Certification (PDF) โ
Documents are published by SRW Products. For the most current versions, visit srwproducts.com.
Order before our daily cutoff and your NW4.5 Non-Woven Drainage and Filtration Fabric ships today from New Jersey.
Questions about your project? Call or text (856) 418-4895 and you will get a real person who works with this gear every day.
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