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Install and Secure the Spacer — Set and Fasten Niche

Beginner8 hours

Part of project

How to Install a Waterproof Foam Shower Niche · Step 5 of 6

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In this video

Carefully place the prepared spacer onto the existing toilet flange, aligning the mounting holes. Press down firmly to compress the putty and silicone, creating a tight seal. Using a drill, drive backer board screws through the spacer's anchor holes and into the plywood subfloor to secure it firmly in place.

Goal: Mount the spacer to the subfloor

  • For concrete subfloors, you would need to use a masonry drill bit and masonry screws, such as Tapcons.

Used in this video

  • Cordless Drill (brand: Ridgid, Tool Type: Power tools, Power Source: Battery-powered, Size/Weight: Medium)Driving screws to secure the spacer
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FAQs

The project is listed as 'beginner' difficulty, but 8 hours seems like a long time. What makes this project take so long, and is it truly suitable for a first-timer?

While the individual steps are straightforward, the 8-hour estimate accounts for careful measuring, precise framing, allowing sealant to cure, and meticulous waterproofing. Rushing these critical steps can lead to leaks, so taking your time to ensure everything is perfect makes it beginner-friendly by emphasizing accuracy over speed.

The required tools list several different drills. Do I need multiple drill/drivers, or will one standard cordless drill suffice for this project?

You only need one capable cordless drill/driver, such as the RYOBI ONE+ 18V Cordless 1/2 in. Drill/Driver, to complete this project. The multiple listings provide options for suitable tools. Ensure your chosen drill has enough power to drive screws into wood studs and backer board efficiently.

What is the most critical step to ensure the shower niche is completely waterproof and won't leak?

The most critical step is the meticulous waterproofing of all seams, especially where the niche meets the backer board. Apply a continuous bead of high-quality waterproof sealant like DAP Ultra Clear, and then properly embed waterproofing banding over all seams and fasteners. This creates a monolithic, leak-proof barrier essential for preventing water damage.

What if my existing wall studs aren't perfectly spaced for the pre-fabricated niche? Do I need to modify the framing?

Yes, you will likely need to modify your wall framing using 2x4 lumber to create a precise, sturdy opening for the niche. This often involves cutting existing studs and installing horizontal blocking to perfectly frame the niche's dimensions, ensuring a flush and stable installation. Accurate framing is crucial for long-term stability and waterproofing.