Reduce heat loss in your vaulted ceiling

Vaulted ceilings, also known as cathedral ceilings, are a popular choice with homeowners for good reason—they're aesthetically beautiful and create an open, inviting look to your living space. But when they're not insulated properly, radiant heat can easily escape upwards, causing your heating and cooling systems to work harder to maintain comfortable temperatures. Save money on energy bills year-round by installing Double Bubble Reflective Insulation in your vaulted ceiling.

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Reflect radiant heat away from your vaulted ceiling

In summer months, radiant heat enters your home through your roof. This causes your air conditioning to work harder, which drastically adds to heating and cooling costs. Reflective Insulation will prevent this by reflecting up to 96% of the radiant heat away from your living space.

Recommended products: Double Bubble Insulation

vaulted ceiling insulation

Prevent condensation in your vaulted ceiling with cathedral ceiling insulation

As with any residential roof structure, there must be adequate ventilation provided from the eave of the building to the peak of the roof. This is important for proper natural airflow in order to eliminate the opportunity for condensation to form between the roofing materials. The easiest way to ensure a ventilation gap in a cathedral ceiling is to install insulation baffles between each ceiling joist. These are easily stapled to the roof sheeting and they create an airspace that will run continuously from the eave to the ridge.

  • Scissors and knife for radiant barrier installation

    Scissors or utility knife

  • Insulation tape for radiant barrier

    Insulation tape

  • staple gun

    Staple gun (~3/4" staples)

  • Install radiant barrier with 1-2 people

    1–2 people

Cathedral Ceiling Insulation Installation Instructions:

Cathedral Ceiling Insulation (Between Joists)

Cathedral Ceiling Insulation (Between Joists)

Instructions for installing reflective insulation in between your vaulted ceiling's joists

Download Instructions (PDF)
Cathedral Ceiling Insulation (Under Joists)

Cathedral Ceiling Insulation (Under Joists)

Instructions for installing reflective insulation under your vaulted ceiling's joists

Download Instructions (PDF)

Cathedral Ceiling Insulation

Why use EcoFoil Cathedral Ceiling Insulation?

  • Reflects 96% of radiant heat - Find out how a radiant barrier works
  • Works in both warm and cold climates
  • Easy installation (see below on How to Install Cathedral Ceiling Insulation)
  • Versatile enough to fit between joists or attach directly underneath joists
  • Very durable and can't be ripped or torn by hand
  • Lightweight and easy to handle
  • Safe to handle and requires no special clothing or breathing equipment

We're here to help!

Insulating a cathedral ceiling can be somewhat complicated and labor intensive if you are not familiar with the requirements of ventilation and thermal heat transfer. Depending on the construction method and materials used there are multiple options for insulating between the exterior roofing and the interior finish. If at any point you'd like help, give us a call at 888.349.3645 and we'll work with you to identify the right installation method for your specific application.

Cathedral Ceiling Insulation Reviews:

Customer Reviews

Based on 65 reviews
Killer Service!

Quick delivery. You guys are all over it.

Thank you for your review! We are so happy to hear you received your product in a timely manner and our satisfied with our service. We strive to provide our customers “What you want. When you need it” and reviews like yours helps us to continue to do so! Please reach out if we can be of any assistance in the future.

Waiting to install

I’m waiting to install so no comments available except this. Why wouldn’t you offer the 3” pre-wrap required to reach R8 spec. You offer with other full wrap options. It should be a stand alone option or placed as a kit.

Thank you for your review! The double bubble product does not have an R value rating. If you are wrapping duct work we offer a specific product which has the R 8 value, EF2280-48-050. If you have any further questions, our team is happy to help! You can contact us by calling 888.349.3645 or by emailing We are open 7am-5pm CST.

James Lacey

The ECOFOIL is very resilient. It's been stepped on a couple of times by accident, without the bubbles having popped. It is wonderfully flexible and entierly simple to install. Even if you're already wired your building, the worst you'd have to do is loosen each electric box so as to fit the ECOFOIL behind it....and even that may not be required. Strongly encourage purchase of the tape they offer. It's very wide, very strong and has excellent adhesion. While not requested here, I first lined each section between studs. I allowed 2" extra, top, bottom and sides, which is where I stapled, so as NOT to create even small staple holes in the ECOFOIL facing the OSB. Only then did I install faced fiberglass. Over the top of this, I then place a second cover of ECOFOIL across the face of the studs, then the drywall. I can't imagine a better approach. Can't wait for our summer weather (central Texas), which last year gave us 53 consecutives days over 100 degrees. This year (and evermore), I'm going to laugh at those days. =)

It is good stuff

I like it . It has quit a lot of applications .

Step 2 Incorporated
Barn= da minimum

Material handles well, keeps shape and easy to staple; Very reflective and waterproof