Mapeguard UM 35 uncoupling and waterproofing membrane

Mapeguard UM 35 is a high-density polyethylene (HDPE) uncoupling membrane with a polypropylene fabric backing designed for installing ceramic and stone tile. It provides crack isolation, waterproofing, and vapor management over challenging substrates like young concrete and single-layer plywood subfloors.

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Key Features:

• Multi-Function Protection: Uncoupling, crack isolation up to 1/8 in (3 mm), waterproofing, and vapor management up to 25 lbs MVER and 100% RH
• Durable Construction: HDPE sheet with polypropylene fabric backing delivers excellent mechanical and compression strength
• Low-Profile Design: Just 1/8 in (3 mm) thickness to minimize floor height buildup
• Installer-Friendly: Circular cavities allow easy troweling; lightweight and holds a chalk line
• Versatile Substrate Compatibility: Suitable over concrete, young concrete, existing non-cushioned resilient flooring, ceramic and stone tile, and single-layer 3/4 in plywood (joists up to 19.2 in OC)

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Material	High-density polyethylene (HDPE) with polypropylene fabric backing
Functions	Uncoupling, crack isolation, waterproofing, vapor management
Crack isolation rating	Up to 1/8 in (3 mm)
Thickness	Approx. 1/8 in (3 mm)
Vapor management	Up to 25 lbs MVER (11.3 kg) and 100% RH
Mechanical properties	Excellent mechanical and compression strength
Weight/Handling	Lightweight; holds a chalk line
Substrate compatibility	Concrete, young concrete, existing non-cushioned resilient flooring, ceramic and stone tile, single-layer 3/4 in (19 mm) plywood with joists up to 19.2 in (49 cm) OC

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Frequently Asked Questions (FAQ):

Q: What substrates can Mapeguard UM 35 be installed over?
A: It can be installed over concrete (including young concrete), single-layer 3/4 in plywood subfloors with joists up to 19.2 in on center, and existing non-cushioned resilient, ceramic, or stone tile.

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Q: How much crack isolation does it provide?
A: It helps protect tile installations by bridging in-plane substrate cracks up to 1/8 in (3 mm).

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Q: Is Mapeguard UM 35 waterproof?
A: Yes. When seams and penetrations are properly treated, the membrane provides waterproofing for wet-area installations.

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Q: What is the thickness of the membrane?
A: The membrane has a low profile at approximately 1/8 in (3 mm) thickness.

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Q: Does it help manage moisture vapor?
A: Yes, it manages vapor pressure up to 25 lbs MVER and 100% relative humidity.

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Elevate Tile Installations with Sculpted, Seamless Confidence

This membrane creates a refined foundation, quietly delivering strength beneath stone and porcelain. I love the subtle, circular texture—an architectural detail that whispers performance while keeping profiles slim. Pair it with expansive marble-look tiles to achieve a gallery-worthy floor that feels effortless. It’s a discreet essential for luxurious living where durability meets design.

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Choose Mapeguard UM 35 today to ensure your next tile project is flatter, drier, and built to last.