quality product
"Very good quality"
MAXKOSKO Dimple Drainage Mat for Crawl Spaces, Basements & Foundations, HDPE Vapor Barrier Underlayment
$89.99 USD
$89.99 USD
$24.99 USD
New added
Sold out
Out of stock
Couldn't load pickup availability
Description
HDPE Dimple Drainage Mat for Crawl Spaces, Basements & Foundations
Create a continuous air and drainage space beneath a vapor barrier. The raised HDPE dimples help incidental water move toward an existing drain or sump while shielding the liner from rough ground and jobsite wear.
- Two Roll Sizes: Choose 2 ft × 50 ft for narrow runs or 4 ft × 50 ft for faster coverage with fewer seams.
- Continuous Drainage Path: Raised dimples create channels beneath the crawl space liner.
- Vapor Barrier Protection: Adds a rigid buffer between the liner and the prepared substrate.
- High Compressive Strength: Rated at 21.8-58.0 psi / 150-400 kPa.
- Virgin HDPE: Durable material for crawl space, basement, and foundation moisture-management systems.
- Wide Temperature Range: Listed for -40°F to 176°F / -40°C to 80°C.
Moves Incidental Water
Creates an open path toward a perimeter drain, collection point, or sump area.
Protects the Liner
Helps reduce contact with rough surfaces, sharp debris, and normal installation wear.
Built for Encapsulation
Installs below a compatible vapor barrier or crawl space liner.
Simple Roll-Out Setup
Prepare the surface, lay dimples down, overlap the sheets, tape the seams, and add the liner.
Selection tip: Measure the project area and include extra material for 2-3 rows of overlap, edge fitting, and trimming. Actual coverage will be lower than the nominal roll area.
Important Before Ordering
Plan the Complete Drainage System
- Drainage Outlet Required: The mat creates a path for water; it does not remove water by itself. Plan a suitable perimeter drain, collection point, or sump system.
- Not a Vapor Barrier: Install a compatible vapor barrier or crawl space liner above the mat.
- Not Primary Waterproofing: Do not use this mat as a substitute for a required waterproofing membrane.
- Prepare the Substrate: Remove sharp rocks, debris, and objects that could damage the mat or liner. Level obvious high spots.
- Allow for Overlap: Adjacent sheets must overlap by 2-3 rows of dimples.
- Protect from Sunlight: Keep unused or exposed material away from prolonged direct sunlight. Store rolls dry and covered.
Recommended Applications
Crawl Space Encapsulation
Use as a drainage mat under a vapor barrier to create channels below the liner.
Basement Moisture Management
Add a drainage and air space within a properly designed basement water-management system.
Foundation Drainage Protection
Support compatible foundation drainage assemblies and help protect adjacent barrier materials.
Vapor Barrier Underlayment
Separate the liner from rough prepared surfaces and reduce direct jobsite wear.
Specifications
| Product Type | High-profile dimple drainage mat / vapor barrier underlayment |
| Material | Virgin high-density polyethylene (HDPE) |
| Available Sizes | 2 ft × 50 ft and 4 ft × 50 ft |
| Nominal Roll Area | 100 sq ft or 200 sq ft before overlap and trimming |
| Compressive Strength | 21.8-58.0 psi / 150-400 kPa |
| Operating Temperature | -40°F to 176°F / -40°C to 80°C |
| Installation Direction | For horizontal floor applications, install with dimples facing down toward the prepared substrate |
| Sheet Joint | Overlap adjacent sheets by 2-3 rows of dimples and secure with compatible heavy-duty seam tape |
| Primary Uses | Crawl space drainage, basement moisture management, foundation drainage protection, and protection beneath vapor barriers |
Installation Guide View Instructions Hide Instructions
- Remove sharp rocks, debris, and objects that could damage the drainage mat or vapor barrier.
- Level obvious high spots and establish a suitable path toward the drainage outlet.
- Unroll the mat with the dimples facing down toward the prepared substrate.
- Overlap adjacent sheets by 2-3 rows of dimples. Align and interlock the dimples.
- Secure the overlapping seams with compatible heavy-duty seam tape. Press along the full joint.
- Install the vapor barrier or crawl space liner over the mat according to its manufacturer's instructions.
Installation Notes
- Keep perimeter drains, collection points, and sump areas clear.
- Do not block the intended water path.
- Protect the mat and liner from sharp tools and concentrated loads during installation.
- Follow the applicable project design and local requirements for foundation wall installations.
What This Drainage Mat Does View Details Hide Details
This dimple drainage mat is one part of a complete moisture-management system. It creates channels and protects the liner, but it does not stop the source of water or pump water from the space.
- Water must have a clear path to a suitable drain, collection point, or sump.
- The prepared surface and project slope affect drainage performance.
- A compatible vapor barrier is still required above the mat when the project calls for vapor control.
- Primary waterproofing, active leaks, and structural water problems must be addressed separately.
Frequently Asked Questions
Which roll size should I choose?
Choose 2 ft × 50 ft for narrow runs, small zones, or easier handling in tight spaces. Choose 4 ft × 50 ft for larger open areas and fewer seams. Include extra material for overlap and trimming.
Does the drainage mat go under the vapor barrier?
Yes. For crawl space floor applications, install the dimple drainage mat on the prepared substrate and place the compatible vapor barrier or crawl space liner above it.
Which way should the dimples face?
For horizontal floor applications, install the mat with the dimples facing down toward the prepared ground or substrate.
How do I join two sheets?
Overlap adjacent sheets by 2-3 rows of dimples. Align and interlock the dimples, then secure the full seam with compatible heavy-duty seam tape.
Will this mat waterproof my crawl space or basement?
No. The mat creates a drainage and air space within a properly designed system. It does not replace a vapor barrier, primary waterproofing membrane, perimeter drain, or sump pump.
Where does the water go?
The raised dimples create channels that help incidental water move toward a planned perimeter drain, collection point, or sump area. The outlet must be established before installation.
Can I cut the mat to fit?
Yes. Trim it to fit the project area while preserving the required overlap and a continuous route to the drainage outlet. Remove sharp cutoffs and debris before installing the liner.
Overall rating: 5.0 / 5 from 1 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].