SEMCO Liquid Membrane sealing seams on a metal roof before winter rain
DIY

Metal Roof Leaking? How to Find and Seal It Before Winter Rain

Metal roof leaking when it rains hard? Here's how to find the real leak point and seal it yourself with a flexible membrane before winter.
SEMCO Liquid Membrane, a flexible water-based liquid rubber alternative
comparison

Liquid Rubber Alternatives: A Longer-Lasting Way to Waterproof

A flexible, water-based liquid waterproofing membrane is the best liquid rubber alternative. See how it compares to rubber, masonry, silicone and sheet membranes, and which lasts longest.
SEMCO Fabric Reinforcement roll used for reinforcing waterproofing membrane at joints and cracks
DIY

What Is SEMCO Fabric Reinforcement and When Do You Actually Need It?

SEMCO Fabric Reinforcement adds tensile strength at floor-to-wall joints, corners, coves, and cracks over 1/4 inch, the spots a waterproofing coating fails first. Here's what it is, when you need i...
SEMCO Liquid Membrane rolled onto shower walls before tiling
bathroom

What Does It Cost to Waterproof a Shower Before Tiling? 2026 DIY vs Pro Breakdown

Professional shower waterproofing runs $450 to $2,500 depending on scope. A DIY liquid membrane and fabric reinforcement costs about $150 to $200 in materials for a standard shower. Here's the real...
SEMCO Liquid Membrane applied to a basement wall, compared against a rubber-based below-grade coating
basement waterproofing

Water-Based Membrane vs Rubber-Based Coating for Basement Walls: Which One Actually Stops Water

Comparing water-based liquid membrane and rubber-based coatings for basement waterproofing: odor, UV exposure, cure time, and which one belongs on an exposed wall.
Wood deck waterproofing membrane applied to an exterior deck before fall rains
deck

Wood Deck Waterproofing Membrane: The Complete Guide Before Fall Rains

Sealers and stains don't stop deck rot at the ledger board and joints. Here's how a liquid waterproofing membrane actually keeps a wood deck dry.
Embedding fabric waterproofing reinforcement into a shower niche corner before tiling
bathroom

Shower Waterproofing Membrane: What Actually Stops Leaks Behind the Tile

Grout isn't what stops a shower leak. See the 3 spots where showers actually fail, and how to waterproof them with a membrane and fabric reinforcement.
Homeowner inspecting a basement concrete wall with a flashlight for mold and moisture staining near the floor to wall joint
basement waterproofing

Is Black Mold on Concrete Basement Walls Actually Dangerous? What to Check Before You Waterproof

Dark staining on a basement wall isn't always toxic black mold. Here's what CDC and EPA guidance actually says, how to check and clean safely, and when to call a pro before you waterproof.
SEMCO Liquid Membrane applied to a real interior basement wall
DIY

Why Some Waterproofing Membranes Smell So Strong (and How to Tell If It's Actually a Problem)

A strong tar or kerosene smell after waterproofing usually means an asphalt-based or rubberized coating was used. Here's what causes it, whether it's a problem, and how odor compares across waterpr...