Insulated Patio Roof: Step-by-Step DIY Installation Guide

Insulating your patio roof offers a wealth of benefits, from reducing the heat gain in the space to lowering your energy expenses. Patio roof insulation, however, does require some initial investment. It can cost anywhere between $1,200 to $3,600, depending on the material and size, to get it done.

If you’re looking to insulate your patio roof without having to spend thousands on installation, you can do it yourself to minimise expenses. Patio roofs are fortunately easy to insulate, especially the non-gable or flat designs.

Follow Just Patios’ step-by-step insulated patio roof guide below to do it yourself.

Materials Needed

You’ll need the following materials for your DIY roof insulation project:

  • Sheet metal
  • Roofing cement
  • Caulk
  • Fiberglass insulation batt
  • Rigid foam insulation
  • Insulation adhesive or duct tape
  • Staple gun
  • Utility knife
  • Light mortar mix or plaster
  • Water-based acrylic or latex paint

Installation Process

  1. Clean the underside of your roof. You can use a light acid cleaner and scrub it clean or mix one tablespoon of chlorine bleach with one gallon of water then use the solution to wash your roof.

  2. While cleaning the underside of your roof, examine it for holes and cracks. You have to patch these first before installing the insulation material to prevent air leaks. You can use sheet metal and caulk or roofing cement to cover the holes.

  3. Measure the spaces between the joists to know what size insulation batts you need. If necessary, use a utility knife to cut the batts to make sure the slabs fit snugly in the space. You want to leave half an inch of space between the panels to let the insulating material breathe. Make sure to secure the insulation batts using a staple gun instead of nails because the latter can puncture the patio roof.

  4. Layer rigid foam insulation on top of the fiberglass. Note that this type of insulation needs to be installed on top of either spray or batt insulation because of the way it lies on the surface. Make sure to install the foam panels perpendicular to the wooden joists.

  5. Seal the edges of the rigid foam using duct tape to protect the insulating material from moisture. You can also use light mortar or plaster to fill the spaces, although it’s not necessary.

  6. If there are any areas on the underside of the roof that are difficult to reach, you can insulate them using spray foam. You might need to rent the special machine for it from your local hardware store, though, so be sure to factor that into your costs.

  7. Finally, cover the insulating foam and duct tape with a layer of paint. You can only use water-based acrylic or latex paint on foam insulation, so double-check the paint before you use it.

This guide works when you don’t feel like tearing out your patio’s existing roof. If you’re willing to redo the entire roof, though, or if you’re only starting to build your patio, you can opt for an insulated patio roofing kit instead. The contains insulated roof panels that you only have to mount and secure onto the patio structure, making the installation process easier and faster.

Insulated Patio Roofing Systems in Brisbane

Just Patios, a long-time builder of patios and room enclosures, offers roof building services to Brisbane residents. We offer a diverse range of patio roofing solutions to meet your needs, lifestyle, and budget. If you prefer to build the patio roof yourself, we also offer DIY kits that are easy to install.

Call us today at 1300 284 531 to learn more about our insulated patio roofing products and services.

Get in touch

Need a builder to custom design and install patios, carports and enclosures in Brisbane? Call the professional builders at Just Patios today!