Thursday, August 5, 2010

Why it's not a good idea to paint a door black

This is a call that I get every few years from our clients...."David, our front door is starting to crack" or "the plastic trim around the glass has melted". Without fail, I know immediately what the problem is. The problem is HEAT! What happens when a surface gets too hot? The material starts to buckle, melt, crack or the paint starts to bubble. Heat's effect on wood, steel or plastic is dramatic, much more so with plastic and steel.

The problem is almost always on a south facing doors and there are a couple other factors that contribute to this problem.


  • Glass storm doors act like an oven when they get direct sun all day. The space between the storm door and the main door heats up to very high temperatures and this causes the plastic trim around the glass to melt. There is also a bead of caulking around the glazing which can be melted as well and it oozes out and drips down the door.

  • The color that you paint the door can have a big impact. Dark colors absorb the UV rays from the sun causing a heat build up in the trim. The higher the temperature of the trim the greater the expansion. Excessive heat absorption could lead to heat distortion of the door and its components. Colors are listed on the Light Reflectance Value index (LRV) and it is a good idea to stick with a paint with an LRV of 55% or higher. Some manufacturers will void the warranty on the door if the door is painted a color with an LRV lower than 55%. What the LRV means is the paint color's ability to reflect light and therefore reduce the surface temperature. Check out this LRV link for more info

If you insist on using a darker color you must assume the risk when it comes time to replace the door. One suggestion I sometimes make is to take out the glass in the storm door and install the screen year round. Even in summer the door will heat up like an oven because the sun is lower and there are no leaves on the trees to block the sun's rays.


Metal doors are the biggest culprits because they get so hot they can burn your skin if you touch them. Most metal doors come with some glass with plastic trim around the glass. If you have a south facing door I might suggest avoiding a metal door/storm door combination and certainly avoid dark paint colors. Even fiberglass doors can experience some of the same problems when painted dark especially when there are glass windows. Wood doors have less problems but what I often see is the wood expands so much that when it shrinks back to its normal size the panels tend to crack and then there is an ugly paint line all around the panels. Some door companies have counteracted this problem by making the panels double thick with two panels floating back to back so if the outer panel cracks at least the 2nd panel will keep out the air.


I guess the bottom line is to use common sense and to err on the side of caution. If you are not sure about a particular door and its pros and cons don't hesitate to ask me any questions.

29 comments:

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  8. We have a fiberglass door that had to be replaced because the paint bubbled so much it turned ugly. Before we paint our new fiberglass door, do you have any suggestions? I was thinking of painting it black (it was dark green), but after reading your blog, I changed my mine. I believe our door faces East, and we have a glass door in front of it. Our summer days could easily reach 100 degrees. Any suggestions would be very much appreciated. Thank you! (not sure what the profiles mean...hope to hear back soon).

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  10. Hi, that was a useful color selection info. Correct me if I am wrong, do light colors reflect warm temperature? How about blue and green?

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  12. I had no idea that there were so many disadvantages to having a black door! It is a really great that there are so many design blogs like this, especially when there are so many design decisions you can make. I think that consulting a professional is another good way to see if your design is a good one or not. http://adrnm.com

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  13. When I got my house remolded I painted my door black. It was fine until summer came and the door would get very hot. Other than that I loved the black and it looks great. http://www.hrcincorporated.com/HandymanRepairs/renovation%20work%20one.htm

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  14. Hello, thank you for this info. - very helpful. We painted our front door black a few months ago before I saw this post..the door faces southwest more or less, and there continues to be a noticeable paint odor from it baking in the sun. I believe we used paint with low VOC, but should I be concerned about breathing in the odor, do you know? Thank you.

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