Rib Lath – 3/8" Standard, 3/4" High Rib & Custom Sizes
AlliedMesh supplies galvanized rib lath for stucco, plaster and concrete work in two rib depths: 3/8" for general lathing and spray-applied stucco, and 3/4" high rib for rigid plaster backing and permanent concrete formwork. Rib height, width and length can also be made to order. Orders start from 1 piece, and samples are available.
- 3/8" or 3/4" Rib depth (custom 5–20 mm)
- G60 or G90 Galvanized zinc coating
- From 1 piece Minimum order, standard and custom
- Samples available Tell us the type and specification
Choose Your Rib Lath
Two standard rib depths, plus made-to-order sizes.
Standard
3/8" Rib Lath
- 3/8" rib depth (approx. 9.5 mm)
- 27" × 97" sheet
- Thickness 0.17–0.45 mm
- Plain or paper-backed
High rib
3/4" High Rib Lath
- 3/4" (19–20 mm) rib depth
- 27" × 97" sheet or 200–700 mm widths
- Pallets of 250 / 300 / 400 pcs
- Plaster backing or permanent formwork
Made to order
Custom Rib Lath
- Length 2.0–2.5 m
- Rib height 5–20 mm
- Thickness 0.15–0.6 mm
- G60 or G90 zinc coating
3/8" Rib Lath
Our 3/8" rib lath is a galvanized expanded metal lath with full-depth ribs running the length of every sheet. The ribs keep the sheet flat and stiff between supports, so it holds its shape while it is fixed and while plaster or stucco goes on. Choose the plain sheet for general lathing, or the paper-backed version, sometimes called spray rib lath, when the coating will be sprayed.
Where it is used
Use 3/8" rib lath as the base for stucco and cement plaster on exterior walls, soffits and ceilings, and as a plaster base for interior walls and ceilings. Choose the paper-backed version when the lath is fixed directly to framing and the coating will be sprayed.
Why Builders Choose It
| Specification | 3/8" Rib Lath |
|---|---|
| Material | Hot-dip galvanized steel |
| Zinc Coating | G60 standard, G90 on request |
| Rib Depth | 3/8" (approx. 9.5 mm) |
| Rib Spacing | About 4 in. (98 mm) |
| Thickness | 0.17–0.45 mm |
| Sheet Size | Approx. 27" × 97" (approx. 686 × 2464 mm) |
| Weight | Approx. 3.4 lb / sq. yd. (approx. 1.84 kg / m²) |
| Framing Span | Up to 24 in. on center |
| Backing | Plain / Paper-backed (kraft paper strips) |
| Packaging | Bundles / Pallets / Export packaging |
| Minimum Order | From 1 piece |
3/4" High Rib Lath
Our 3/4" high rib lath is an expanded metal lath with deep longitudinal ribs, 19–20 mm high, in place of the 3/8" rib. The deeper ribs add strength under load, so the sheet can serve as a rigid plaster backing and also as formwork that stays inside the concrete. In the trade it is also known as stay form or stay-in-place formwork lath.
Plaster and render backing
Fix it to ceilings, walls and stud partitions as a firm base for plaster or render. It also helps with old or damaged masonry. Where the wall face has crumbled or softened and no longer gives plaster a reliable key, the lath is fixed over it and supplies a new one.
Permanent formwork for concrete
In building and civil engineering work, the ribbed sheet is set where concrete will be placed and stays in the finished structure. Nothing has to be stripped out afterwards, and the sheet can be cut and shaped to follow the profile of the pour.
Why choose it
- Deep 19–20 mm ribs that stand up to stress better than flat diamond lath
- Stays in place as formwork, so there is no stripping step
- Can be cut and shaped on site
- One product for both plaster backing and concrete formwork
- 27" × 97" sheets, or a width series from 200 to 700 mm
- Other rib heights and widths made to order
| Specification | 27" × 97" Sheet | Width Series |
|---|---|---|
| Rib Depth | 3/4" (19–20 mm) | 19–20 mm |
| Rib Distance | 98 mm | 100 mm |
| Size | 27" × 97" (approx. 686 × 2464 mm) | Widths 200 / 300 / 400 / 500 / 600 / 700 mm, lengths 2.0–2.5 m |
| Weight | 11.9 lbs / pc (approx. 5.4 kg) | On request |
| Pallet Packing | 250 pcs / pallet standard, 300–400 pcs / pallet on request | 250 / 300 / 400 pcs / pallet |
| Custom Specifications | Other rib heights and widths made to order | Other rib heights and widths made to order |
| Minimum Order | From 1 piece | From 1 piece |
3/8" Rib Lath vs 3/4" High Rib Lath
| 3/8" Rib Lath | 3/4" High Rib Lath | |
|---|---|---|
| Rib Depth | 3/8" (approx. 9.5 mm) | 3/4" (19–20 mm) |
| Rib Spacing | About 4 in. (98 mm) | 98 mm (27" sheet), 100 mm (width series) |
| Sheet Size | Approx. 27" × 97" | 27" × 97", or widths of 200–700 mm |
| Weight | Approx. 3.4 lb / sq. yd. (approx. 6.9 lb per sheet) | 11.9 lbs per 27" × 97" sheet (approx. 5.4 kg) |
| Typical Use | Stucco and cement plaster on walls, soffits and ceilings; paper-backed for spray stucco | Plaster backing on ceilings, walls and partitions; refurbishing damaged masonry; permanent concrete formwork |
| Packing | Bundles / Pallets / Export packaging | 250 / 300 / 400 pcs per pallet |
| Custom Size | Yes | Yes |
| Minimum Order | From 1 piece | From 1 piece |
Custom Rib Lath
If standard sizes do not fit your project, we can make rib lath to your length, thickness, rib height and width. Custom orders also start from 1 piece, and samples are available before you commit.
| Parameter | Custom Range |
|---|---|
| Length | 2.0–2.5 m |
| Thickness | 0.15–0.6 mm |
| Rib Height | 5–20 mm |
| Width | Other widths made to order |
| Zinc Coating | G60 / G90 |
| Backing | Plain / Paper-backed |
| Pallet Packing | 250 / 300 / 400 pcs per pallet |
| Minimum Order | From 1 piece |
| Samples | Available |
What to Include in Your Inquiry
- Rib lath type: 3/8", 3/4" high rib or custom
- Sheet length and width
- Rib height and thickness
- Zinc coating requirement (G60 or G90)
- Plain or paper-backed
- Quantity and destination port
- Pallet packing requirement (pcs per pallet)
- Drawing or reference sample, if you have one
How Custom Orders Work
- Send your specification. Share a drawing, sample photo or the parameters above.
- Confirm details. We check the specification with you and can make a sample.
- Receive your quotation. Price and delivery based on your quantity and destination.
- Production and export packing. Packed on pallets for shipment.
Why Source Rib Lath from AlliedMesh
Factory-Backed Supply
Selected metal lath products are produced by our own manufacturing factory in China, so specifications and quality can be controlled at the source. See factory details.
Small Orders and Samples
Standard and custom rib lath both start from 1 piece, and samples are available, so you can check the product before placing a larger order.
One Supplier, Mixed Orders
Combine rib lath with metal lath, stucco mesh and stucco accessories from the same supplier.
Rib Lath FAQ
What is rib lath used for?
Rib lath is a galvanized expanded metal lath with raised ribs. It is used as a stiff base for plaster, render and stucco on walls, ceilings, soffits and partitions. The deeper 3/4" type is also used as permanent formwork for concrete.
What is the difference between 3/8" rib lath and 3/4" high rib lath?
The difference is the rib depth. 3/8" rib lath (approx. 9.5 mm ribs) is the standard choice for stucco and plaster. 3/4" high rib lath has 19–20 mm ribs, which add strength under load, and is used for rigid plaster backing and for permanent concrete formwork.
Is "high rib lath" the same as 3/8" rib lath?
Some suppliers in North America use "high rib lath" for 3/8" sheets. On this page, high rib refers to the deeper 3/4" (19–20 mm) type, and 3/8" is simply called rib lath. If you are unsure which one your specification calls for, send it to us and we will confirm.
What is paper-backed (spray) rib lath?
It is 3/8" rib lath with kraft paper strips bonded on at the factory. The paper stops spray-applied stucco from passing through the mesh, which reduces waste. Use plain rib lath when spraying is not part of the job.
How far can 3/8" rib lath span?
3/8" rib lath can span framing up to 24 in. on center. Always follow your project's lathing specification and local requirements.
Can 3/4" high rib lath be used as permanent formwork?
Yes. It is set where concrete will be placed and stays in the finished structure, so nothing has to be stripped out afterwards.
What sizes are available?
3/8" rib lath comes in approx. 27" × 97" sheets. 3/4" high rib lath comes in 27" × 97" sheets and in widths of 200, 300, 400, 500, 600 and 700 mm, with lengths from 2.0 to 2.5 m. Other rib heights, widths and lengths can be made to order.
What zinc coating do you use?
3/8" rib lath is made from hot-dip galvanized steel with a G60 zinc coating as standard, and G90 is available on request. Tell us the coating you need when you request a quote.
What can be customized?
Length (2.0–2.5 m), thickness (0.15–0.6 mm), rib height (5–20 mm), width, zinc coating (G60 or G90), backing and pallet packing. Send your specification with your quote request.
What is the minimum order and how is it packed?
The minimum order is 1 piece for both standard and custom rib lath. 3/4" high rib lath is packed on pallets of 250, 300 or 400 pieces. Send us your quantity and destination port for pricing.
Can I get a sample first?
Yes, samples are available. Tell us the rib lath type and specification you want to check.
Can you provide test reports or documentation?
Tell us which documentation your project requires, and we will confirm what we can provide for your order.
Request a Rib Lath Quote
Send us your rib lath type, specification, quantity and destination port. Orders start from 1 piece, and samples are available.