What is the best door to keep heat out?

Author: Bernita Kautzer DVM  |  Last update: Monday, January 12, 2026

Fiberglass is the most energy-efficient front door material. Fiberglass doors do not conduct heat and they are also designed with polyurethane cores to further reduce heat loss during the winter. They also combat sweltering temperatures during the summer.

What are the best doors to keep heat in?

uPVC doors are an excellent choice for any home, as they have a large range of benefits. uPVC doors offer fantastic insulation and energy efficiency which reduces heat losses through the door.

What is the best door for hot weather?

For hot weather, you'll need a front door able to withstand constant heat. A thermally broken door will keep the heat outside and the cool inside of the house. This door can be made of any material, but wrought iron and fiberglass are the most common options.

What type of door insulates the best?

Most steel and fiberglass doors usually have R-values between R-5 and R-6, so they typically provide more insulating value than wood doors. This means a fiberglass or steel door that's 1-1/2 inches thick will have five times more insulating value than a solid wood door of the same thickness.

What front doors don't get hot?

Heat-Resistant Materials

Industry veterans unanimously agree that fiberglass is the optimal material for an exterior door. A fiberglass door is built to endure the brunt of Mother Nature's wrath including egregiously high summer temperatures.

Best Blinds to Keep Heat Out

What is the best front door for full sun?

Fiberglass doors, like those offered by Plastpro, have a proven track record of success in withstanding the sun's wrath yet other door materials are more likely to suffer damage such as warping and fading. Choose a UV-resistant fiberglass door and you'll enjoy an invaluable peace of mind.

How can I reduce the heat on my front door?

To help beat the heat on doors with long periods of sun exposure, consider installing a permanent or retractible shade. The addition of an awning or adjustable shade structure will not only decrease sun damage, but also aid in cooling the overall temperature of your exterior doors.

What is the best door to keep cold out?

Attach a door sweep along the bottom of the door to seal any gaps between the door and the threshold, preventing cold air from entering. Consider replacing the door with one that has an insulated core, such as a fiberglass or steel door, which provides better thermal resistance compared to traditional wooden doors.

What is the warmest front door?

Aluminium doors are renowned for their exceptional thermal insulation properties, making them highly efficient at preventing heat transfer. They effectively keep the interior warm during colder months and maintain a cooler temperature during warmer seasons.

What type of door is the most energy-efficient?

While aluminum and wood are popular front door material types, fiberglass is the most energy-efficient front door material above all.

How do I reduce the heat loss in my front door?

To properly insulate a front door, sealing gaps with weatherstripping, installing door sweeps or draught stoppers, and using insulating glass panels are effective methods that prevent draughts and minimise energy loss.

What are the disadvantages of fiberglass doors?

The Cons of a Fiberglass Front Door
  • Fiberglass Doors May Be More Expensive. ...
  • Less Security Compared to Some Options. ...
  • Homeowners Association Bylaws. ...
  • Slightly Less Resale Value Possible.

How do I protect my front door from hot sun?

Apply a protective finish

Finishings such as exterior-grade varnishes, sealants, or polyurethane coatings will provide a strong barrier that will prevent UV rays from penetrating the wood's surface, which will help to minimise any cracking or warping in the internal structure of your door.

What is the best interior door for insulation?

While both hollow core and solid core doors have their own unique benefits, solid core doors offer a better investment in the long term, providing better sound insulation, improved thermal performance, and a higher quality feel.

Does closing interior doors keep house warmer?

4. Does Closing Unused Room Doors Help Save Heat? Closing the doors to unused rooms can help save heat, but only if those rooms are properly insulated. Otherwise, blocking airflow might cause pressure imbalances that make your HVAC system less efficient, ultimately increasing energy costs.

How do you insulate a door for heat?

How to Insulate an Entry Door to Save on Energy Bills
  1. Inspect for Gaps and Cracks. Begin by examining the door frame and edges for any visible gaps or cracks where air might be leaking. ...
  2. Install Weatherstripping. ...
  3. Add a Door Sweep. ...
  4. Seal Around the Door Frame. ...
  5. Upgrade the Door Material or Core. ...
  6. Install a Storm Door.

What is the best front door for extreme heat?

Metal doors don't perform great in the heat. Metal captures heat and keeps it in, and metal will often be hot to the touch. Consider wood or fiberglass doors instead if heat is a major concern.

What are the best doors for keeping heat in?

High Density Foam-Filled Composite Door

The foam core provides excellent insulation, helping to keep heat inside your home and preventing cold air from coming in, and yielding immediately noticeable savings on your winter energy bills.

What type of door has the best insulation?

Material and Core: Steel or fiberglass doors with a polyurethane foam insulation core can offer up to five times the insulating value compared to a solid wood door. Weatherstripping: A door with magnetic strip weatherstripping helps improve energy efficiency.

What is the warmest type of front door?

Composite doors offer excellent insulation properties, helping to keep your home warm in the winter and cool in the summer. They come in a variety of styles and finishes, allowing you to find the perfect door to complement your home's aesthetic.

How to block cold air from front door?

  1. Use Weather Strips. Weather strips are an inexpensive way to seal doors and windows in your home. ...
  2. Install New Door Sweeps. Installing a door sweep along the bottom of an exterior door can block out cold air. ...
  3. Apply Foam Tape. ...
  4. Insulate with Window Film. ...
  5. Hang Insulated Curtains. ...
  6. Recaulk Windows and Doors. ...
  7. Use a Door Snake.

What is the best front door for security and insulation?

Again, fiberglass wins in thiscategory. After all, it's a man-made material designed with energy use in mind. All fiberglass doors have a thick layer of foaminside to protect your house from the elements and insulate your home formaximum energy efficiency.

How do I keep my front door handle from getting hot?

A door handle cover will help prevent the metal from heating up.

How can I make my house less hot?

If the summer temperatures have you needing to chill out, try our tips.
  1. Open your windows at night. ...
  2. Close your window coverings. ...
  3. Insulate and air seal your home. ...
  4. Bake and wash at night. ...
  5. Fire up the grill! ...
  6. Install an exterior window shade. ...
  7. Use your fans in the right places. ...
  8. Use your exhaust fans.

Why is my front door always cold?

First check for draughts from around the door, and window edge, letterbox etc. If you find any seal them, or realign the door if between the door and frame. Sometimes a 'snake' at the bottom of the door can help. Maybe the glass panels need replacing if there is misting in them.

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