Free Shipping on most orders over $200 - Call +1 931-525-3504 for details.

Free Shipping on most orders over $200 - Call our sauna experts today: +1 931-525-3504

Your cart

Your cart is empty

Continue shopping
FOIL
FOIL

The sauna foil vapor barrier is a critical component for any high-performance sauna. This Type C Single-Sided Foil Vapor Barrier features a durable paper-backed design that reflects radiant heat back into the room, significantly increasing overall efficiency. Installing this single-sided foil creates a continuous moisture shield that protects wall studs and insulation from rot and heat loss.

One roll (3.28' x 82.02') provides 269 sq. ft. of coverage, ideal for saunas up to 6' x 8' x 7'. This paper-backed vapor barrier is designed to staple directly to studs before installing tongue and groove paneling. For the best results, all seams should be overlapped and sealed with foil tape to create a completely airtight envelope for both electric and wood-burning heaters.

  • Radiant heat reflection – Single-sided, paper-backed foil surface reflects radiant energy back into the room, effectively boosting wall R-value so heaters work more efficiently, warm-up times shorten, and operating costs drop while maintaining a consistent, comfortable sauna temperature.
  • Moisture-control protection – Installed as a continuous layer over insulation, the barrier helps block vapor migration into framing and insulation, reducing the risk of rot, mold, and structural damage in high-humidity sauna environments over the long term.
  • Generous roll coverage – With 269 sq. ft. per roll sized at 3.28' x 82.02', a single package is sufficient for saunas up to about 6' x 8' x 7', simplifying material planning and minimizing offcuts and waste on typical residential builds.
  • Straightforward installation – Designed to staple directly to studs after insulation, it trims easily with basic tools, allowing installers to overlap seams 2"–3" and move quickly from framing stage to tongue and groove paneling.
  • Tight, efficient envelope – When seams are sealed with compatible tape, the paper-backed foil layer forms a continuous air and vapor barrier, improving overall energy efficiency, supporting stable interior temperatures, and helping heaters maintain predictable performance session after session.
  • MPN: Not specified
  • Compatibility: Interior wall and ceiling assemblies of traditional saunas up to approximately 6' × 8' × 7'
  • Part Type: Single-sided foil vapor barrier roll
  • What’s Included: One roll of Type C Single-Sided Foil Vapor Barrier
  • Dimensions: 3.28' × 82.02' (269 sq. ft. coverage per roll)
  • Coverage Area: Up to 269 sq. ft., suitable for saunas up to about 6' × 8' × 7'
  • Operation: Reflects radiant heat back into the sauna to help increase effective R-value and heating efficiency
  • Moisture Protection: Acts as a continuous vapor barrier to help limit moisture migration into framing and insulation
  • Installation: Installed over insulation and stapled to studs; overlap adjoining runs by 2"–3" and seal seams for best results
  • Recommended Accessory: Tough-Tape Aluminum Foil Tape for sealing seams and maximizing moisture protection
5.0
Rated 5.0 out of 5 stars
5 Reviews

Sauna Foil Vapor Barrier | The Sauna Place

by The Sauna Place Inc
SKU: SP-FOIL
$48.99
Availability
 
(0 in cart)
Fast Shipping
Secure payment
Financing available via Bread Pay and Shop Pay

The sauna foil vapor barrier is a critical component for any high-performance sauna. This Type C Single-Sided Foil Vapor Barrier features a durable paper-backed design that reflects radiant heat back into the room, significantly increasing overall efficiency. Installing this single-sided foil creates a continuous moisture shield that protects wall studs and insulation from rot and heat loss.

One roll (3.28' x 82.02') provides 269 sq. ft. of coverage, ideal for saunas up to 6' x 8' x 7'. This paper-backed vapor barrier is designed to staple directly to studs before installing tongue and groove paneling. For the best results, all seams should be overlapped and sealed with foil tape to create a completely airtight envelope for both electric and wood-burning heaters.

  • Radiant heat reflection – Single-sided, paper-backed foil surface reflects radiant energy back into the room, effectively boosting wall R-value so heaters work more efficiently, warm-up times shorten, and operating costs drop while maintaining a consistent, comfortable sauna temperature.
  • Moisture-control protection – Installed as a continuous layer over insulation, the barrier helps block vapor migration into framing and insulation, reducing the risk of rot, mold, and structural damage in high-humidity sauna environments over the long term.
  • Generous roll coverage – With 269 sq. ft. per roll sized at 3.28' x 82.02', a single package is sufficient for saunas up to about 6' x 8' x 7', simplifying material planning and minimizing offcuts and waste on typical residential builds.
  • Straightforward installation – Designed to staple directly to studs after insulation, it trims easily with basic tools, allowing installers to overlap seams 2"–3" and move quickly from framing stage to tongue and groove paneling.
  • Tight, efficient envelope – When seams are sealed with compatible tape, the paper-backed foil layer forms a continuous air and vapor barrier, improving overall energy efficiency, supporting stable interior temperatures, and helping heaters maintain predictable performance session after session.
  • MPN: Not specified
  • Compatibility: Interior wall and ceiling assemblies of traditional saunas up to approximately 6' × 8' × 7'
  • Part Type: Single-sided foil vapor barrier roll
  • What’s Included: One roll of Type C Single-Sided Foil Vapor Barrier
  • Dimensions: 3.28' × 82.02' (269 sq. ft. coverage per roll)
  • Coverage Area: Up to 269 sq. ft., suitable for saunas up to about 6' × 8' × 7'
  • Operation: Reflects radiant heat back into the sauna to help increase effective R-value and heating efficiency
  • Moisture Protection: Acts as a continuous vapor barrier to help limit moisture migration into framing and insulation
  • Installation: Installed over insulation and stapled to studs; overlap adjoining runs by 2"–3" and seal seams for best results
  • Recommended Accessory: Tough-Tape Aluminum Foil Tape for sealing seams and maximizing moisture protection
5.0
Rated 5.0 out of 5 stars
Based on 5 reviews
Total 5 star reviews: 5 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
How would you rate the quality of this sauna accessory?Rated 4.8 on a scale of 1 to 5
How would you rate the functionality/usefulness of this accessory?Rated 5.0 on a scale of 1 to 5
How would you rate the design and style of this accessory?Rated 4.6 on a scale of 1 to 5
Write a Review (Opens in a new window)
5 reviews
  • MM
    Matthew M.
    Verified Buyer
    I recommend this product
    Sauna Motivation : Relaxation & stress relief
    Sauna Location : Indoors
    Sauna Experience : First-time owner
    What do you love about this Sauna Accessory? High-quality materials
    Rated 5 out of 5 stars
    39 minutes ago
    Foil barrier 5 stars

    Was perfect! Great quality

    How would you rate the quality of this sauna accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the functionality/usefulness of this accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the design and style of this accessory?Rated 5.0 on a scale of 1 to 5
    Was this helpful?
    TS Profile picture for The Sauna Place
    The Sauna Place
    21 seconds ago

    Thank you for your review! We are thrilled you love the product.

  • RM
    Renn M.
    Verified Buyer
    I recommend this product
    Sauna Motivation : Relaxation & stress relief, Muscle recovery and fitness, Health & wellness benefits, Longevity
    Sauna Location : Outdoors
    Sauna Experience : Long time sauna lover
    What do you love about this Sauna Accessory? Practical design, High-quality materials
    Rated 5 out of 5 stars
    Yesterday
    Aluminum foil vapor barrier

    I love the aluminum foil, it’s strong for what it is and I like that there is no plastic! Using it currently in a horse trailer sauna build and couldn’t be happier.

    How would you rate the quality of this sauna accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the functionality/usefulness of this accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the design and style of this accessory?Rated 5.0 on a scale of 1 to 5
    Was this helpful?
    TS Profile picture for The Sauna Place
    The Sauna Place
    3 hours ago

    Thank you for your review. We are so glad you love the product and we appreciate your business.

  • CR
    Chad R.
    Verified Buyer
    I recommend this product
    Sauna Motivation : Relaxation & stress relief
    Sauna Location : Indoors
    Sauna Experience : First-time owner
    What do you love about this Sauna Accessory? High-quality materials, Durable
    Rated 5 out of 5 stars
    2 months ago
    Purchased the foil I needed

    They had just what I needed. Thx.

    How would you rate the quality of this sauna accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the functionality/usefulness of this accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the design and style of this accessory?Rated 5.0 on a scale of 1 to 5
    Was this helpful?
  • DC
    Daniel C.
    Verified Buyer
    I recommend this product
    Sauna Motivation : Health & wellness benefits
    Sauna Location : Indoors
    Sauna Experience : First-time owner
    What do you love about this Sauna Accessory? High-quality materials, Great value
    Rated 5 out of 5 stars
    2 months ago
    A great source for a sturdy vapor barrier!

    The Sauna Place stocks a great quality vapor barrier at a reasonable price.

    How would you rate the quality of this sauna accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the functionality/usefulness of this accessory?Rated 5.0 on a scale of 1 to 5
    How would you rate the design and style of this accessory?Rated 5.0 on a scale of 1 to 5
    Was this helpful?
    TS Profile picture for The Sauna Place
    The Sauna Place
    2 months ago

    Thank you, Daniel, for sharing your experience and for choosing The Sauna Place!

Show More