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.

See how it works

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.

Customer Reviews

Based on 60 reviews
JoEllen Woolsey
Very satisfied

Easy to install, works for our needs perfectly! Getting ready to order another roll!

walter bahr

That’s exactly what I needed for my 17 foot windshield in my RV. I did double face it to give it more rigidity, but it’s working perfectly.


Good stuff easy to install

Pamela Labine

Double Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)

Samuel Dallstream

Working good, stapling in crawl space overhead.

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)

Recommended products: Double Bubble Insulation

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.