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Mortairvent Rainscreen Drainage Mat 39 in. x 61-1/2 ft. Roll
Regular price $153.78Orders start at $399 — combine any items to reach the minimum. Learn more
Mortairvent Rainscreen Drainage Mat 39 in. x 61-1/2 ft. Roll
Mortairvent Rainscreen Drainage Mat creates a ventilated drainage gap behind siding to shed bulk water and promote drying of the wall assembly. It is offered in 39 in. x 61-1/2 ft. rolls in two thicknesses, .125 in. and 1/4 in., and installs between the weather-resistant barrier and the cladding. Pair it with compatible flashing and fastener schedules for a complete exterior wall system.
Key Features:
- Drainage gap: The mat forms a continuous airspace that allows water draining behind cladding to exit the wall.
- Ventilated wall: Rainscreen geometry promotes airflow and drying of the sheathing behind siding.
- Two thicknesses: Choose .125 in. or 1/4 in. mat depth to match the drainage cavity required for the project.
- Wide roll: The 39 in. width covers a broad band of wall per course to speed installation.
- Flexible mat: The drainage material conforms to the wall and can be cut to fit around openings.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Mortairvent |
| Sell unit | Square (SQ) for .125 in. version; roll (RL) for 1/4 in. version |
| Product line | Mortairvent Rainscreen Drainage Mat |
| Available sizes | 39" x 61-1/2' x .125"; 39" x 61-1/2' x 1/4" |
| Dimensions | 39 in. wide x 61-1/2 ft. long |
| Thickness | 0.125 in. or 0.25 in. depending on variant |
| Material | Drainage mat (rainscreen membrane) |
| Intended use | Exterior wall drainage and ventilation behind siding |
Coverage & How Much You Need:
Each roll is 39 in. wide by 61-1/2 ft. long, providing roughly 197 sq. ft. of wall coverage per roll laid flat. Plan vertical courses with slight overlap at joints to maintain a continuous drainage plane.
Fit and Compatibility:
Designed for use behind exterior cladding over a weather-resistant barrier on framed walls. The .125 in. and 1/4 in. options suit different cavity-depth requirements; confirm local code expectations for rainscreen depth.
Frequently Asked Questions (FAQ):
Q: What is included with one order?
A: The .125 in. version is sold by the square (SQ) and the 1/4 in. version by the roll (RL); each order unit covers one listing of the mat as packaged by the manufacturer.
Q: Which thickness should I choose?
A: The 1/4 in. mat provides a deeper drainage cavity than the .125 in. mat; select based on your wall assembly design and local code requirements.
Q: How wide is the material?
A: Both versions are 39 in. wide, installed vertically or horizontally over the weather-resistant barrier.
Q: Where does this product go in the wall?
A: It installs between the weather-resistant barrier and the exterior cladding to create a drainage and ventilation gap.
Q: How much wall does one roll cover?
A: At 39 in. x 61-1/2 ft., one roll spans about 197 sq. ft. before allowing for laps and cutouts.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Rainscreen mats like Mortairvent are the go-to fix for moisture-related siding problems in wet climates, where code or best practice calls for a drainage gap. The 1/4 in. mat is the safer choice behind thick cladding like brick or stucco systems; .125 in. is adequate for many lap-siding assemblies. Run courses with shingled laps so water always drains outward, and seal penetrations as you go.
Follow the siding manufacturer's installation instructions and local building codes for drainage requirements behind cladding.
Order the Mortairvent Rainscreen Drainage Mat in the thickness your wall assembly calls for.
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