DIYer rolling SEMCO Liquid Membrane onto an interior basement wall
basement waterproofing

What a Basement Waterproofing Membrane Really Costs: 2026 Price-Per-Square-Foot Breakdown

Professional basement waterproofing runs $3 to $13+ per square foot installed. A DIY liquid membrane costs about $0.39 per square foot in material. Here's the real cost breakdown.
SEMCO Liquid Membrane applied to a basement wall ahead of fall rains
basement waterproofing

Basement Waterproofing Checklist: 7 Steps Before Fall Rains Hit

A 7-step basement waterproofing checklist to run before fall rains hit: cracks, the floor-to-wall joint, grading, humidity, and when to reapply membrane.
SEMCO Liquid Membrane applied as a water-based waterproofing membrane on a real interior basement wall
basement waterproofing

Water-Based vs Silicone-Based Basement Waterproofing: The Full Comparison

Water-based liquid membrane and silicone-based coatings both waterproof a basement, but they're built for different jobs. Here's the full comparison, by scenario.
DIYer rolling SEMCO Liquid Membrane over taped drywall seams in an unfinished basement
basement waterproofing

Do You Really Need to Waterproof Drywall? Every Question Answered

Is drywall really waterproof? Get straight answers on green board, cement board, and how to seal drywall seams yourself with a water-based membrane.
SEMCO Liquid Membrane applied to a real interior basement wall during a DIY waterproofing project
basement waterproofing

Basement Waterproofing Membrane: How to Choose One That Won't Fail (2026 Buyer's Guide)

What to check before buying a basement waterproofing membrane: elongation, cure time, VOC, and cost per square foot. A 2026 buyer's guide.
SEMCO Liquid Membrane applied to a real interior basement wall for DIY waterproofing
basement waterproofing

How to Waterproof a Basement From the Inside: The Complete DIY Guide

Step-by-step guide to waterproofing a basement from the inside: what you need, crack repair, coating steps, cost, and when to call a pro.