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Clean the Base for Sealing — Final Cleanup and Preparation

Beginner3 hours

Part of project

How to Install a Toilet Flange Extender After Tiling · Step 6 of 6

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In this video

Before applying sealant, thoroughly clean the area around the base of the toilet and the floor where the caulk will be applied. Use a clean, dry cloth to wipe away any dust, dirt, or moisture. A clean surface ensures proper adhesion for the silicone sealant.

Goal: Prepare surface for sealant

Used in this video

  • Cleaning Cloth (brand: Unbranded, Tool Type: Cleaning Cloth, Material: Microfiber)Wiping down the toilet base and floor before caulking.
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FAQs

Why do I need a toilet flange extender after tiling, and how do I know if I need one?

Tiling often raises the floor level, causing the existing toilet flange to sit too low. This prevents the wax ring from creating a proper, watertight seal, leading to potential leaks. You know you need an extender if the top of your existing flange is below the new finished floor level.

Is installing a toilet flange extender a difficult DIY project for a beginner, and how long does it typically take?

This project is rated as 'beginner' difficulty because it primarily involves careful measurement, cleaning, and sealing, not complex plumbing pipework. Most DIYers can complete it in approximately 3 hours, assuming all necessary tools and materials are readily available.

What are the most crucial tools and materials I'll need to ensure a successful, leak-free installation?

Beyond basic tools like a tape measure and caulk gun, a quality toilet flange extender kit and a reliable silicone sealant are critical. Don't skip on robust #10 3” wood screws for securely fastening the extender to the subfloor, as any movement can compromise the seal. Thorough cleaning materials are also essential.

What are the common mistakes to avoid when installing a toilet flange extender to prevent future leaks?

The most common mistakes include not thoroughly cleaning the old flange, failing to apply sufficient silicone sealant for a waterproof bond, and not securing the extender firmly to the subfloor. Always dry-fit the extender to ensure the correct height (flush or slightly above the finished floor) before applying sealant.

Clean the Base for Sealing — How to Install a Toilet Flange Extender After Tiling (Step 6, Video 3) | Stesso