What should I use to insulate my bathroom walls?

Best Bathroom Insulation Materials for Your Walls

When it comes to finding the best insulation for your bathroom walls, spray foam and fiberglass-based insulation materials are both good choices. In terms of pricing, fiberglass insulation is more budget-friendly to use than spray foam insulation.

How do you insulate a cold bathroom?

  • Replace silicone sealant on the window edges.
  • Install weather stripping on window or door edges.
  • Window insulation film.
  • Installing proper ventilation.
  • Bleeding a bathroom radiator.
  • Installing a more efficient radiator or towel rail.
  • Water saving shower heads.

What type of insulation should I use for shower walls?

The insulation behind the tub or shower should be equivalent to the insulation in the rest of the exterior walls and should be covered with an air barrier of cement backer board, rigid foam insulation, or non-paper-faced drywall that is sealed at the edges and seams to provide a continuous air seal.

How can I insulate my walls cheaply?

  • Radiant Barrier.
  • Stone Wool.
  • Fiberglass Batts.
  • Blown-in Cellulose.
  • Rigid Foam Boards.
  • Spray Foam.

Do interior bathroom walls need vapor barrier?

A bathroom is generally a very warm place. This is because whenever warm air meets colder air, the formation of moisture is therefore guaranteed. The vapor barrier is vital as it screens the place where the moisture could definitely form.

How do you stop moisture in bathroom walls?

  • Wipe down surfaces. To prevent mould from being formed because of condensation, use an old towel to wipe down the surfaces of your bathroom after you’ve had a shower or bath.
  • Install bacteria-reducing wall panels.
  • Use condensation-reducing paint.
  • Use a dehumidifier.
  • Have a cooler shower.

Do bathroom walls need to breathe?

You can’t see it, but it’s certainly there and it can cause issues in any room of your home. Air needs to circulate in order to stop the build-up of moisture (caused by baths, showers and even toilets) which can then lead to the presence of mould.

Where should you not put insulation?

Do not use fiberglass insulation in basements. Fiberglass traps mold well and basements are notorious for having moisture problems. Instead, use closed cell foam board and spray for basement installation. Never place insulation close to water heaters, oil burners or anything hot.

How can I add warmth to my bathroom?

  • Add Color with Towels, Rugs and Artwork.
  • Use Plants to Bring in Natural Tones.
  • Swap Shampoo Bottles for Aesthetic Ones.
  • Change the Tone of Your Lightbulbs.
  • Choose Faux Stone Refinishing for Walls and Countertops.
  • Use a Wall Color That Softens the Stark White.

Why is my bathroom so cold in winter?

Because of all the hard surfaces in the room tiling, porcelain mirrors, windows. The room feels much cooler than other rooms. All of these hard surfaces actually reflect the cold that’s in the room.

How do I make my bathroom warm and COSY?

  • Try a Rain Showerhead.
  • Enclose the Tub.
  • Add Splashes of Color With Textiles.
  • Add Some Furniture.
  • Invest in Shelving.
  • Install a Heated Towel Rack.
  • Decorate With Treats.
  • Towel Racks in All Shapes and Types.

What should I put between drywall and shower?

Be sure to use mesh tape in damp environments like the bathroom. Filling the gap means cutting the sheetrock so that it runs up to the edge of the enclosure’s mounting flange, pre-filling the recess with hot mud (setting compound), then taping and finishing with standard drywall compound to cover the joint.

What should I put behind shower walls?

Install cement board or an equivalent moisture-resistant backing material on walls behind tub and shower enclosures composed of tile or panel assemblies with caulked joints. Don’t use paper-faced backer board, i.e., paper-faced drywall, behind seamed tub and shower enclosures.

Where do you put a vapor barrier in a bathroom?

In regions where interior humidity levels are typically greater than those on the outside, a vapor barrier is placed on the interior surface of the wall, while permeable sheathings are used on the exterior.

How do you insulate a wall without taking it down?

Injection foam insulation is the answer to insulating walls without removing drywall. There are several types of injection foam available out there, including the RetroFoam product we use. These materials don’t require the drywall in your home to be taken down.

How do you insulate a wall without opening it?

You may add insulation to your walls without removing it by cutting holes into the siding. You can blow spray foam or cellulose into the walls from outside. Just cut a 1 inch to 2-inch hole between the studs at the top of the wall and then spray the insulation into the hole using a hose.

What is the best material to insulate your walls with?

Foam Board or Rigid Foam

They provide good thermal resistance (up to 2 times greater than most other insulating materials of the same thickness), and reduce heat conduction through structural elements, like wood and steel studs.

Should you put insulation behind shower walls?

Insulating behind shower walls improves moisture control, which in turn reduces the chances of mold growth. Apart from retaining heat and minimizing condensation, insulating behind shower walls also provides better acoustics by reducing annoying sounds from outdoors or between rooms.


  1. https://www.angi.com/articles/good-bathroom-insulation-prevents-mold-rot.htm
  2. https://www.jm.com/en/homeowner-insulation/product-selector/insulating-your-bathroom/
  3. https://www.drench.co.uk/blog/how-to-guides/keeping-your-bathroom-warm-in-winter
  4. https://basc.pnnl.gov/resource-guides/walls-behind-showers-and-tubs
  5. https://www.attainablehome.com/6-affordable-insulation-for-interior-walls/
  6. https://bathplanetnewjersey.com/reasons-to-use-a-vapor-barrier-in-your-bathroom/
  7. https://www.mirashowers.co.uk/blog/how-to/how-to-prevent-reduce-bathroom-condensation/
  8. http://www.islandbathrooms.co.uk/blog/how-to-ventilate-protect-your-bathroom-from-moisture-the-expert-way
  9. https://sunshinecontractingcorp.com/blog/2013/07/27/the-top-mistakes-to-avoid-when-installing-insulation-in-your-home/
  10. https://www.marylandtubntile.com/blog/how-to-add-warmth-to-an-all-white-bathroom/
  11. https://runtalnorthamerica.com/why-is-my-bathroom-cold/
  12. https://www.modernbathroom.com/blog/post/2019/03/06/15-things-you-can-do-to-make-your-bathroom-cozy
  13. https://wallboardtrim.com/how-to-finish-drywall-where-it-meets-the-shower/
  14. https://basc.pnnl.gov/resource-guides/cement-board-installed-behind-tile-and-panel-tub-and-shower-enclosures
  15. https://www.finehomebuilding.com/pdf/021151052.pdf
  16. https://www.retrofoamofmichigan.com/blog/insulate-house-without-taking-down-drywall
  17. https://www.azinsulation.com/how-to-insulate-walls-without-removing-the-drywall/
  18. https://www.energy.gov/energysaver/types-insulation
  19. https://bathroomprosnj.com/blog/should-you-insulate-behind-shower-walls/

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