Most people have run across a toilet tank that sweats. But why does this happen and how can you stop your toilet tank from sweating?
That’s what we’re going to learn with this fun craft project that solves your problem.
Table of Contents
- Why Would a Toilet Tank Sweat?
- Here’s What You’ll Need
- Stop Your Toilet Tank from Sweating in 7 Steps!
- Alternative Remedy for Toilet Tank Sweating
- Final Thoughts
- Call 1-Tom-Plumber
Why Would a Toilet Tank Sweat?
Condensation (or sweating) often forms on the outside of toilet tanks when air humidity is high. In other words, the inside of the tank is significantly cooler than the outside of the tank.
Occasional sweating is normal. However, continuous condensation may run down the side of the toilet and rot the floor underneath.
Preventing tank condensation requires insulating the inside of your tank. And that’s what we’re going to show you how to do with this DIY remedy for a sweating toilet tank.
Here’s What You’ll Need
To complete this homemade project, you’ll need the following items:
- Kraft paper
- Common pins
- 1/2-0inch molded polystyrene foam (commonly called Styrofoam insulation)
- Waterproof mastic
- Scrub pad
- Utility knife
- Putty knife
Stop Your Toilet Tank from Sweating in 7 Steps!
Now that you’re prepared with tools and materials for your homemade solution, let’s get started with the instructions. Follow them as closely as you can.
1. Turn Off Water Supply
First, shut off the water supply valve located under the toilet tank. It will be against the wall. Now remove the remaining water from your toilet tank with a sponge. You can squeeze out the water into your tub or sink.
2. Scrub the Inside Walls
Once you’ve removed all the water, you now must clean and dry the inside walls of the toilet tank. Do this with your scrub pad, then rinse the tank out. Let it dry completely overnight.
3. Make Front & Back Wall Patterns
Now it’s time to craft toilet wall patterns (or templates) using kraft paper. First, trim the kraft paper. You will need to create patterns for the front and rear inside walls of the tank. Make sure you trim the paper to a close fit. Cut out an area for the tank handle.
4. Cut the Foam
Pin the patterns you’ve just created onto the 1/2-inch Styrofoam insulation. Cut the Styrofoam to the shape of the paper with a utility knife. Then split the front panel vertically to fit the panel behind the handle.
5. Apply Mastic to Foam Panels
With a putty knife, apply waterproof mastic to the foam panels. Press them against the inside walls of the tank.
6. Make the Side Panels
You’ve already made the front and rear panels and placed them into the tank. Now it’s time to create the panels for the sidewalls of the tank. Use the same system as before for making these side-piece patterns, pin them to the foam, and cut the foam to shape.
7. Adjust, Fit, Apply & Wait
It’s time to fit and adjust your left and right-side panels. Once they fit as you’d like them to, apply mastic to the side pieces. Then press them into place inside the tank. Finally, let the mastic dry overnight before turning the water supply valve back on.
Alternative Remedy for Toilet Tank Sweating
Not everyone wants to go through the homemade process of crafting Styrofoam walls to place inside their tank. For those who like to DIY but want something more ready-made, try the Kenney K836-22 Anti-Condensation Toilet Tank Liner Insulation Kit.
Here are some great resources related to toilet repairs that you can do yourself.
- Leaking toilet tanks and bowls (quick-fix solutions)
- Toilet troubleshooting (6 problems you can diagnose and fix)
- Toilet failure is a leading cause of water damage
- Easy way to fix intermittently running toilet
- My toilet flush is slow: how can I fix it?
- How to replace a toilet handle: step by step guide
- How to replace a toilet wax ring
- Can you flush cat litter down the toilet?
- Leaking toilet flapper: how to fix it!
Stopping your toilet tank from sweating isn’t your typical plumbing job. But it is important to take care of before it causes water damage to your floors or underneath your toilet.
The best part is that this homemade solution is a fun craft project that anyone can do without a plumber.
1-Tom-Plumber’s certified team of plumbers and drain technicians respond immediately to any emergency plumbing, drain cleaning, or water damage problem. We also handle the excavation of underground water lines and sewer main lines. Our immediate-response team is available every day and night of the year, even on holidays.