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A low-profile reinforcing underlayment for tile and stone that strengthens wood subfloors, helps reduce deflection, and provides crack-isolation protection without adding unnecessary floor height.
SKU: 527-904-US
$469.00
Qualifies For
BLANKE PERMAT is a multifunctional reinforcing underlayment designed for interior ceramic, porcelain, and natural stone tile installations. Unlike a basic separation membrane, PERMAT uses a layered reinforcing mesh system to add strength to the tile assembly while helping manage movement in the substrate.
At approximately 1/8 inch thick, PERMAT is a practical choice when floor height matters. It can be especially useful over wood subfloors where additional reinforcement is needed but adding another layer of plywood or a thicker backer board is not desirable. The system also provides crack-isolation protection over suitable cement-based substrates.
Each panel is installed in thinset mortar with the fleece side down. The factory mesh overhangs overlap adjoining sheets, so separate seam tape is not required. Once the panels are embedded and the mesh is filled with mortar, tile can be installed in the same work sequence.
PERMAT is suited to a wide range of tile work, including large-format porcelain and natural stone, subject to the substrate and installation requirements for the project. One carton contains 30 panels and covers approximately 195 square feet.
Confirm that the substrate, joist spacing, mortar, tile type, movement joints, and project conditions meet current BLANKE requirements. PERMAT is not a substitute for correcting a weak, damaged, excessively flexible, or otherwise unsuitable floor structure.
For planning purposes, divide the project square footage by 195 sq. ft. and round up to the next full carton. Allow additional material for cuts, layout changes, damaged pieces, and site conditions. For larger commercial jobs, it is usually better to order the full project quantity at one time to help avoid delays.
To determine approximate delivery time for your order shipped via UPS Ground, please locate the zone where the Ship-To address for your order is located. Note the color of that zone then check the number of days listed next to the color in the Transit Days Chart on the bottom right of the Zone Map. Please note that the delivery time is calculated beginning the day after your order has shipped.
Complete the installation with the mortar, trowel, mixing tools, movement-joint profiles, and other tile-setting accessories required for the project. Where possible, link this section to compatible Tile Pro Depot products rather than relying only on a generic related-products carousel.
Make sure the floor is clean, dry, flat, load-bearing, and free of dust, coatings, debris, or contaminants that could interfere with mortar bond.
Use a thinset mortar that is suitable for both the substrate and the tile installation. Follow the mortar manufacturer’s instructions for mixing and open time.
Spread the mortar with the trowel size specified by BLANKE for PERMAT installation. Work only over an area that can be covered before the mortar skins over.
Place the panel into fresh mortar with the white fleece backing facing the substrate. Press it firmly into place with a float or roller to achieve full contact.
Butt the panels together and overlap the factory mesh extensions. Separate seam tape is normally not required.
Leave the required clearance at walls, columns, and other restraining vertical surfaces. Do not bridge required movement or expansion joints.
Use thinset mortar to fill the mesh and panel surface before combing additional mortar for the tile.
Set the tile using the trowel and coverage appropriate for the tile size and project. Tile installation can continue after PERMAT is properly embedded.
Installation note: Always follow the current BLANKE PERMAT installation instructions, applicable tile-industry standards, mortar-manufacturer instructions, and project-specific substrate requirements. Verify suitability for heated floors, wet areas, exterior work, unusual substrates, or special-use assemblies before installation.
Product type: Multifunctional reinforcing underlayment for tile and stone
Application: Interior floor installations
Nominal thickness: Approximately 1/8 in. (about 3.3 mm)
Panel size: Approximately 2 ft. x 3.2 ft.
Coverage per panel: Approximately 6.5 sq. ft.
Panels per carton: 30
Coverage per carton: Approximately 195 sq. ft.
Carton weight: Approximately 31.8 lb.
Top reinforcement: Alkali-resistant glass-fiber mesh
Lower reinforcement: HDPE mesh
Backing: Polypropylene fleece
Part number / SKU: 527-904-US
Installation method: Embedded in suitable thinset mortar
Suitable tile types: Ceramic, porcelain, large-format tile, and natural stone, subject to installation requirements
Typical substrate types: Suitable plywood, OSB, and cement-based substrates, subject to BLANKE requirements
Plywood: Suitable plywood assemblies may be used when the floor structure, panel thickness, fastening, and joist spacing meet the required installation criteria.
OSB: PERMAT may be installed over suitable OSB assemblies when the substrate meets the current manufacturer requirements.
Concrete and Cement-Based Substrates: PERMAT can be used as a reinforcing and crack-isolation underlayment over suitable cement-based floors.
Natural Stone Assemblies: Natural stone has more demanding substrate requirements than many ceramic or porcelain tiles. Confirm the complete floor assembly before installation.
Heated Floors and Special Applications: Verify compatibility and system requirements with BLANKE before using PERMAT in heated-floor or other special-use assemblies.
Warranty coverage depends on the complete installation assembly and current BLANKE warranty terms. Review the latest manufacturer warranty before installation, especially for projects involving natural stone, unusual substrates, high-load conditions, or system-specific coverage.
BLANKE PERMAT is designed for installers who need more than a basic uncoupling layer. Its reinforcing mesh construction strengthens the tile assembly, helps reduce deflection in suitable wood subfloors, and keeps the underlayment profile to approximately 1/8 inch. That combination makes it useful on remodels, transitions, large-format tile work, and other installations where both floor support and finished height matter.
Compared with conventional board-type underlayments, PERMAT is lightweight and easy to handle. Compared with simple roll membranes, it is built around reinforcement as well as movement management. BLANKE also reports higher compression and tensile performance than conventional rolled uncoupling products in its current product literature.
For contractors, the panel format can simplify handling and layout. The factory mesh overhangs connect adjacent sheets without separate seam tape, and tile can be installed as part of the same installation sequence after the underlayment has been properly embedded.
Do not choose an underlayment by thickness alone. Before ordering, check the floor structure, joist spacing, substrate type, tile size, and whether the project involves natural stone. PERMAT can add valuable reinforcement, but the supporting floor still has to meet the requirements of the complete tile assembly.
Is BLANKE PERMAT an uncoupling membrane?
PERMAT provides movement-management and crack-isolation benefits, but BLANKE primarily positions it as a reinforcing underlayment. Its mesh structure is designed to add strength to the tile assembly rather than functioning only as a separation layer.
Can BLANKE PERMAT be installed over plywood?
Yes, when the plywood subfloor and supporting structure meet the applicable installation requirements.
Can PERMAT be installed over OSB?
It can be used over suitable OSB assemblies when the substrate and floor structure meet current BLANKE requirements.
Can it be used over concrete?
Yes, over suitable cement-based substrates prepared according to the installation requirements.
How thick is BLANKE PERMAT?
The finished underlayment itself is approximately 1/8 inch thick before accounting for mortar and tile.
How much does one carton cover?
One carton contains 30 panels and covers approximately 195 square feet.
Does PERMAT require seam tape?
The factory mesh overhangs are designed to overlap adjoining sheets, so separate seam tape is normally not required for standard installations.
Can tile be installed immediately after PERMAT?
Tile can be installed after the PERMAT panels are properly embedded and the reinforcing mesh is filled with mortar, following the current installation instructions.
Can PERMAT be used under natural stone?
Yes, but natural stone installations have stricter substrate requirements. Confirm the floor structure and current BLANKE requirements before installation.
Is PERMAT suitable for large-format tile?
Yes, provided the substrate, mortar, coverage, flatness, and other installation requirements are appropriate for the tile being used.
What mortar should be used?
Use a mortar that is compatible with the substrate and tile assembly and that meets BLANKE and mortar-manufacturer requirements.
How many cartons do I need?
Divide the project area by 195 square feet and round up to the next full carton. Add extra material for cuts, layout, waste, and site conditions.
Show the current stock status, shipping method, expected lead time, and any return restrictions directly on the live product page. If the item is special order, ships from the manufacturer, or requires freight on larger quantities, state that clearly before checkout.
