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Blanke PERMAT Reinforcing Tile Underlayment
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At a Glance
Quick Decision Guide
Package
1 Panel
Panel Size
24" x 38"
Coverage
6.5 Sq. Ft.
Thickness
Approx. 1/8"
Applications
Tile & Natural Stone
Substrates
Plywood, OSB & Cement
Crack Isolation
Yes
Tile Installation
Immediately After PERMAT Installation
Why Choose This Product
Key Benefits
Subfloor Reinforcement
Strengthens wood substrates and reduces deflection
Crack Isolation
Uncoupling properties help manage substrate movement stress
High Strength
Provides strong compressive and tensile performance
Self-Seaming Panels
Mesh overhang connects adjacent panels without separate seam tape
Immediate Tile Installation
Tile can be set directly after installing the underlayment
Lightweight Panels
Easier to handle and install than heavier underlayment products
Product Information
Product Details
Specifications
Brand
Blanke®
Part Number
527-904-US-1
UPC
609613302084
Product Type
Reinforcing Tile & Stone Underlayment
Package Quantity
1 Panel
Panel Size
24" x 38"
Coverage
6.5 Sq. Ft.
Thickness
Approx. 1/8" (3.3 mm)
Panel Weight
Approx. 1.06 lbs.
Applications
Interior Tile & Natural Stone Floors
Compatible Substrates
Plywood, OSB & Cement
Crack Isolation
Yes
Panel Connection
Self-Seaming Mesh Overhang
Installation
Thinset Mortar
Recommended Trowel
1/4" x 1/4" Notched
Tile Installation
Immediately After Underlayment Installation
About This Product
Reinforcing Underlayment for Tile and Stone
Blanke® PERMAT is a reinforcing underlayment that strengthens wood substrates and reduces deflection beneath tile and natural stone installations. Its layered mesh construction provides high compressive and tensile strength while also providing crack isolation through uncoupling.
Self-Seaming Panel Design
Each lightweight panel features a mesh overhang that connects adjacent panels without separate seam tape. The overlapping mesh helps transfer substrate movement stress across the installation while providing resistance to delamination during installation.
Wood and Concrete Subfloor Applications
PERMAT can be installed over interior plywood, OSB, and cement subfloors. For tile over wood framing with joists spaced 16" to 24" on center, a minimum 3/4" subfloor is required. Natural stone installations require a 3/4" subfloor with joists spaced 16" to 19" on center; at 24" spacing, an additional 3/8" layer is required.
Thinset Installation with Immediate Tile Setting
PERMAT installs fleece-side down into thinset mortar applied with a 1/4" x 1/4" notched trowel. Panels are installed with overlapping mesh and a minimum 3" offset pattern. Tile can be installed immediately after the underlayment is placed, with no extended cure time required for latex-modified thinset mortar beneath porcelain tile.
Common Questions
Frequently Asked Questions
What is Blanke PERMAT used for?
PERMAT is a reinforcing underlayment for interior tile and natural stone installations. It strengthens wood substrates, reduces deflection, and provides crack isolation through uncoupling.
Can Blanke PERMAT be installed over plywood and OSB?
Yes. PERMAT can be installed over plywood and OSB subfloors as well as cement subfloors.
What subfloor is required for tile over wood framing?
For tile installations with joists spaced 16" to 24" on center, a minimum 3/4" plywood or OSB subfloor is required.
What subfloor is required for natural stone?
Natural stone requires a 3/4" subfloor with joists spaced 16" to 19" on center. With joists spaced 24" on center, an additional 3/8" layer is required.
Do Blanke PERMAT panel seams need to be taped?
No. The panels have a mesh overhang that connects adjacent panels, eliminating the need for separate seam tape.
Can tile be installed immediately over Blanke PERMAT?
Yes. Tile can be installed immediately after PERMAT is installed. No extended cure time is required for latex-modified thinset mortar beneath porcelain tile.
What trowel is used to install Blanke PERMAT?
Blanke specifies applying loosely mixed thinset mortar to the substrate with a 1/4" x 1/4" notched trowel before installing PERMAT fleece-side down.