Posted by Spycor Building on Oct 14th 2026
For conventional stucco and adhered manufactured stone veneer, DELTA®-DRY & LATH is the most complete rainscreen Spycor Building Products carries. It is a ventilated HDPE rainscreen with a factory pre-installed, alkali-resistant glass lath that replaces wire lath for the scratch coat.
- Installing your own wire lath? Choose DELTA®-DRY STUCCO & STONE. Its factory pre-installed mortar screen keeps the scratch coat out of the dimples.
- Specifying a drainage mat? Mortairvent® 203 and ortairvent® 202 are both listed for stone and stucco.
- Mixed claddings on one job? DELTA®-DRY is listed for use behind any approved exterior cladding.
All five ship in bulk skid quantities for full-project coverage. Shop Rainscreen Skids for Stucco & Stone Veneer Projects →
Why stucco and stone veneer need a purpose-built rainscreen
Conventional stucco and adhered manufactured stone veneer are absorptive claddings. Dörken notes they can drive solar-driven moisture toward the interior of the wall, and its rainscreens are designed to impede that movement.
These claddings also go on over a mortar scratch coat. A plain dimpled membrane can fill with mortar, so stucco and stone versions add either a mortar screen or a pre-installed lath. That is the main decision this guide helps you make.
Every product below is installed outboard of the water-resistive barrier (WRB) and creates an air gap for drainage and ventilation behind the cladding.
Rainscreen skids for stucco and stone veneer: side-by-side comparison
The two DELTA® stucco and stone products build the scratch-coat interface into the roll; the Mortairvent® mats use filter fabric; standard DELTA®-DRY is a plain dimpled membrane.
Product (skid) |
Cavity thickness |
Roll size |
Rolls per skid |
Coverage per skid |
Built into the roll |
Best fit |
|---|---|---|---|---|---|---|
|
10.5 mm |
3.28 ft × 46 ft (151 sq ft) |
12 |
1,812 sq ft |
Alkali-resistant glass lath |
Stucco and manufactured stone, no separate wire lath |
|
|
10.5 mm |
3.3 ft × 46 ft (151 sq ft) |
12 |
1,812 sq ft |
Polypropylene fabric mortar screen |
Stucco and manufactured stone, wire lath installed over it |
|
|
10 mm (0.40 in) |
39 in × 40 ft (130 sq ft) |
18 |
2,340 sq ft |
Polymer-core mesh with filter fabric |
Stone, stucco, brick, wood or fiber cement; deeper cavity |
|
|
6 mm (0.25 in) |
39 in × 61.5 ft (200 sq ft) |
18 |
3,600 sq ft |
Polymer-core mesh with filter fabric |
Stone, stucco, brick, wood or fiber cement; most coverage per skid of the four |
|
|
10.5 mm |
3.3 ft × 50 ft (162.5 sq ft) |
24 |
3,900 sq ft |
Dimpled HDPE membrane only |
Mixed approved claddings across a project |
Specs are from each product page on spycorbuilding.com. Confirm the cavity depth and assembly your project documents call for before ordering.
Compare all rainscreen skids and single rolls on the Rainscreen category page →
Best rainscreen skids for stucco and manufactured stone veneer
1. DELTA®-DRY & LATH Rainscreen — 12-Roll Skid (1,812 sq ft)
Best for: stucco and manufactured stone veneer contractors who want rainscreen and lath in one layer.
DELTA®-DRY & LATH is a ventilated rainscreen with a pre-installed glass lath for manufactured stone and conventional stucco claddings. The alkali-resistant fiberglass lath replaces wire lath for application of the scratch coat, so no metal lath is needed. Dörken notes the glass will not corrode and is safer to handle than sharp metal mesh.
- Membrane: special high-density polyethylene (HDPE) with Dörken's Air-gap Technology
- Drainage path: two-sided drainage and ventilation through a dimple-and-groove design
- Standards listed: meets ASTM E2925-17; the glass lath complies with ICC-ES AC 275 (MVMA requirements); Dörken evaluation report ER-0323
- Skid: 12 rolls, 1,812 sq ft · SKU 22600117-SKID
Why contractors choose it: Dörken describes it as a 2-in-1 solution that reduces labor costs when used with claddings requiring a scratch coat. The pre-installed lath also makes it suited to absorptive claddings.
Documents: Brochure · Installation instructions · Architectural details · Technical data
Shop the DELTA®-DRY & LATH 12-Roll Skid →
2. DELTA®-DRY STUCCO & STONE Rainscreen — 12-Roll Skid (1,812 sq ft)
Best for: stucco and stone contractors who prefer to install their own wire lath.
DELTA®-DRY STUCCO & STONE is a 3-dimensional HDPE rainscreen membrane with a factory pre-installed polypropylene fabric mortar screen. The screen prevents scratch coats from filling the dimple structure, which Dörken says reduces scratch coat mortar consumption.
- Drainage and drying: an air gap on both sides of the membrane, plus a complete capillary break behind the cladding
- Moisture control: protects against bulk water intrusion such as wind-driven rain, and drains transient moisture moving through the wall
- Vapor: lets interior-driven water vapor escape through the ventilated space between sheathing and membrane
- Skid: 12 rolls, 1,812 sq ft · SKU 600068-SKID
Installation notes from the product page: install outboard of the WRB over sheathing board. It cuts with a utility knife, seams butt together with no overlap, and wire lath goes directly over the mortar screen.
Documents: Brochure · Installation instructions · Technical data · Architectural drawings · SDS
Shop the DELTA®-DRY STUCCO & STONE 12-Roll Skid →
3. Mortairvent® 203 Rainscreen 10 mm — 18-Roll Skid (2,340 sq ft)
Best for: contractors whose assembly calls for a 10 mm drainage mat behind stone or stucco.
Mortairvent® 203 creates a drainage and ventilation cavity between the WRB and the exterior wall. Its 93% open polymer-core mesh forms the airspace, and a 2-ply backer fabric deflects mortar when used with stucco or masonry veneer.
- Thickness: 0.40 in (10 mm)
- Listed claddings: stone, stucco, brick, wood or cedar, EIFS or fiber cement siding
- Built-in features: integrated insect screen; Class A fire rating
- Exposure: 30-day UV exposure maximum
- Recycled content: 40% recycled content, which Advanced Building Products says contributes to LEED points
- Skid: 18 rolls of 39 in × 40 ft, 2,340 sq ft · SKU MORTAIR10-SKID
Documents: Mortairvent® data sheet
Shop the Mortairvent® 203 18-Roll Skid →
4. Mortairvent® 202 Rainscreen 6 mm — 18-Roll Skid (3,600 sq ft)
Best for: projects where the specified assembly allows a 6 mm drainage mat and the crew wants fewer skids to stage.
Mortairvent® 202 uses the same polymer-core mesh and mortar-blocking filter fabric as 203, in a thinner 6 mm profile. Each roll covers 200 sq ft, so a skid covers 3,600 sq ft.
- Thickness: 0.25 in (6 mm)
- Listed claddings: stone, stucco, brick, wood or cedar, EIFS or fiber cement siding
- Built-in features: integrated insect screen; Class A fire rating
- Exposure: 30-day UV exposure maximum
- Skid: 18 rolls of 39 in × 61.5 ft, 3,600 sq ft · SKU MORTAIRPS-SKID
202 or 203? The difference is cavity depth versus coverage: 203 gives a 10 mm cavity, 202 gives a 6 mm cavity and more square feet per roll. Use the depth your wall assembly and local code require.
Documents: Mortairvent® data sheet
Shop the Mortairvent® 202 18-Roll Skid →
Other rainscreen options for exterior cladding projects
DELTA®-DRY Rainscreen — 24-Roll Skid (3,900 sq ft)
Best for: builders, general contractors and envelope contractors running several cladding types across one project or a series of homes.
DELTA®-DRY is Dörken's dual-chambered ventilated rainscreen, without a mortar screen or lath. Dörken specifically addresses highly absorbent reservoir claddings such as conventional stucco and manufactured stone. Dörken lists it for drying through ventilation behind any approved exterior cladding. It also impedes solar-driven moisture with absorptive claddings such as adhered manufactured stone veneer, stucco, cement board siding and brick veneer.
- Moisture control: complete capillary break behind the cladding; drains bulk water such as wind-driven rain and transient moisture moving through the wall
- Drying: an air gap on both sides of the membrane lets interior-driven vapor escape
- Installation: outboard of the WRB over sheathing board; seams butt together with no overlap, per Dörken; cladding installs as usual on top
- Skid: 24 rolls of 3.3 ft × 50 ft, 3,900 sq ft · SKU 600048-SKID
When to pick a stucco and stone version instead: for scratch-coat claddings, DELTA®-DRY & LATH and DELTA®-DRY STUCCO & STONE build in the lath or mortar screen. Check the DELTA®-DRY installation instructions for your cladding before ordering.
Documents: Brochure · Installation instructions · Architectural details · Technical data · SDS
Shop the DELTA®-DRY 24-Roll Skid →
How to choose the right rainscreen for stucco or stone veneer
Start with how the scratch coat meets the rainscreen, then confirm cavity depth against your project documents.
If your project… |
Start with |
Why |
|---|---|---|
|
Uses a scratch-coat cladding and you want rainscreen and lath in one layer |
Pre-installed glass lath replaces wire lath for the scratch coat |
|
|
Uses a scratch-coat cladding and your crew installs its own wire lath |
Mortar screen keeps scratch coat out of the dimples; wire lath goes over it |
|
|
Specifies a 10 mm drainage mat |
10 mm cavity; filter fabric blocks mortar |
|
|
Allows a 6 mm drainage mat |
6 mm cavity; 200 sq ft per roll |
|
|
Mixes stucco, stone, cement board siding or brick veneer |
Listed behind any approved exterior cladding; 3,900 sq ft per skid |
Integrated lath vs. mortar screen vs. drainage mat
Integrated lath |
Mortar screen |
Drainage mat |
|
|---|---|---|---|
|
Product |
DELTA®-DRY & LATH |
DELTA®-DRY STUCCO & STONE |
Mortairvent® 203 / 202 |
|
Core material |
HDPE dimpled membrane |
HDPE dimpled membrane |
Polymer-core mesh |
|
What faces the scratch coat |
Alkali-resistant glass lath |
Polypropylene fabric mortar screen |
Filter fabric |
|
Separate wire lath |
Replaced by the glass lath |
Installed directly over the mortar screen |
Per your assembly and installation instructions |
|
Drainage and ventilation |
Both sides of the membrane |
Both sides of the membrane |
Cavity between WRB and cladding |
|
Coverage per skid |
1,812 sq ft |
1,812 sq ft |
2,340 / 3,600 sq ft |
All three install outboard of the WRB. Follow the manufacturer's installation instructions and your local code for the full wall assembly.
How many rainscreen skids do you need?
Divide your net wall area by the skid coverage, then cover any remainder with single rolls or a second skid. These are preliminary purchasing estimates based on nominal coverage, not a final takeoff.
- Measure the net wall area to receive rainscreen, after subtracting openings.
- Divide by the skid coverage and round down to whole skids.
- Divide the remainder by the single-roll coverage and round up.
- Add your standard allowance for waste, cuts, laps at corners and openings, and any project-specific requirements.
Worked example: 3,000 sq ft of net wall area
Product |
Coverage per skid |
Coverage per roll |
Order option A |
Order option B |
|---|---|---|---|---|
|
1,812 sq ft |
151 sq ft |
1 skid + 8 rolls (3,020 sq ft) |
2 skids (3,624 sq ft) |
|
|
1,812 sq ft |
151 sq ft |
1 skid + 8 rolls (3,020 sq ft) |
2 skids (3,624 sq ft) |
|
|
2,340 sq ft |
130 sq ft |
1 skid + 6 rolls (3,120 sq ft) |
2 skids (4,680 sq ft) |
|
|
3,600 sq ft |
200 sq ft |
1 skid (3,600 sq ft) |
— |
|
|
3,900 sq ft |
162.5 sq ft |
1 skid (3,900 sq ft) |
— |
All figures use nominal coverage before waste, cuts and laps; confirm final quantities against your takeoff. Single rolls of each product are listed on the Rainscreen category page. For multi-home or phased projects, call Spycor Building Products at (843) 517-8180 to plan skid quantities.
Contractor pre-order checklist
- Confirm the cladding: conventional stucco, adhered manufactured stone veneer, or mixed
- Confirm the cavity depth your project documents and local code require
- Decide the lath approach: integrated glass lath, or mortar screen plus your own wire lath
- Review the manufacturer's installation instructions and architectural details
- Confirm WRB placement; every product here installs outboard of the WRB
- Calculate net wall area and round to skids plus single rolls
- Order the rest of the assembly: Air & Water Resistive Barriers and Lath
- Check current availability on each product page, or call (843) 517-8180
Technical documents for architects and building envelope consultants
Product |
Installation |
Details and drawings |
Data and safety |
|---|---|---|---|
|
DELTA®-DRY & LATH |
|||
|
DELTA®-DRY STUCCO & STONE |
|||
|
Mortairvent® 203 and 202 |
|||
|
DELTA®-DRY |
Listed standards: DELTA®-DRY & LATH meets ASTM E2925-17, and its glass lath complies with ICC-ES AC 275. Mortairvent® carries a Class A fire rating and 40% recycled content.
Manufacturer approvals and guide specifications (from Dörken):
- DELTA®-DRY & LATH: evaluation report ER-0323 · 3-part guide specification
- DELTA®-DRY STUCCO & STONE: evaluation report ER-0908 · 3-part guide specification
- DELTA®-DRY: evaluation report ER-0908 · 3-part guide specification
- Mortairvent®: manufacturer resources
Order rainscreen skids for your next stucco or stone veneer project
Spycor Building Products stocks DELTA®-DRY & LATH, DELTA®-DRY STUCCO & STONE, Mortairvent® 203, Mortairvent® 202 and DELTA®-DRY in skid and single-roll quantities.
Shop Rainscreen Skids for Stucco & Stone Veneer Projects →
Questions about quantities or product selection? Call (843) 517-8180.
Frequently asked questions
What is the best rainscreen for stucco?
For conventional stucco, DELTA®-DRY & LATH is the most complete option: an HDPE rainscreen with a pre-installed glass lath that replaces wire lath for the scratch coat. If you install your own wire lath, DELTA®-DRY STUCCO & STONE adds a mortar screen instead.
What is the best rainscreen for manufactured stone veneer?
DELTA®-DRY & LATH and DELTA®-DRY STUCCO & STONE are both made for manufactured stone and conventional stucco. Mortairvent® 203 and 202 are also listed for stone. Choose by lath approach and the cavity depth your assembly calls for.
What is the difference between DELTA®-DRY & LATH and DELTA®-DRY STUCCO & STONE?
DELTA®-DRY & LATH has a pre-installed alkali-resistant glass lath that replaces wire lath. DELTA®-DRY STUCCO & STONE has a pre-installed polypropylene fabric mortar screen, and wire lath is installed directly over it. Both skids hold 12 rolls covering 1,812 sq ft.
Mortairvent® 202 vs. 203: which should I use?
Mortairvent® 203 is 10 mm thick and covers 2,340 sq ft per 18-roll skid. Mortairvent® 202 is 6 mm thick and covers 3,600 sq ft per 18-roll skid. Use the cavity depth your wall assembly and local code require.
Do I still need a water-resistive barrier?
Yes. Dörken specifies DELTA®-DRY and DELTA®-DRY STUCCO & STONE for installation outboard of the water-resistive barrier over sheathing board, and Mortairvent® creates its cavity between the WRB and the exterior wall. Plan for a separate WRB in your assembly.
Can standard DELTA®-DRY go behind stucco or stone?
Yes. Dörken positions DELTA®-DRY for highly absorbent reservoir claddings such as conventional stucco and manufactured stone. It has no mortar screen or lath, so check its installation instructions for scratch-coat claddings. The stucco and stone versions build those layers in.
How much does one rainscreen skid cover?
DELTA®-DRY & LATH: 1,812 sq ft. DELTA®-DRY STUCCO & STONE: 1,812 sq ft. Mortairvent® 203: 2,340 sq ft. Mortairvent® 202: 3,600 sq ft. DELTA®-DRY: 3,900 sq ft.
What standards does DELTA®-DRY & LATH meet?
It meets ASTM E2925-17, the standard specification for manufactured polymeric drainage and ventilation materials used to provide a rainscreen function. Its glass lath complies with ICC-ES AC 275 (MVMA requirements), and Dörken publishes evaluation report ER-0323 for the product.
Is Mortairvent® fire rated?
Spycor's product listings show a Class A fire rating for Mortairvent® 203 and 202, along with an integrated insect screen and a 30-day maximum UV exposure. Confirm against the current Mortairvent® data sheet for your submittal.
How do I order rainscreen for a large or repeat project?
Order by the skid from the Rainscreen category page and top up with single rolls. For multi-home or phased work, call Spycor Building Products at (843) 517-8180.
