Return to the Home Disasters Forum | Post a Follow-Up

Vinyl Siding

Posted by joepa2325 (My Page) on
Thu, Jan 31, 08 at 9:17

My new house (2007) has vinyl siding. The siding next to my neighbor's house is melting. The cause seems to be sunlight reflecting off of the neighbor's windows and onto the siding. I am told that the windows are "Low E" windows that are designed to reflect the sun. I have pictures of the focused light hitting the siding where the melting occurs.

Anyone else have this problem or familiar with issue?

Follow-Up Postings:

RE: Vinyl Siding

Wow!!! That is simply not acceptable siding performance. I'd be going back to the building contractor for immediate resolution. Hope the siding company has a warranty.

Unbelievable, too. I can't imagine that much heat being generated by reflected sunlight. Direct sunlight is way hotter than reflected unless there is some weird effect from a concave window pointing a concentrated beam on your house which I gather you are describing when you say the light is focused on your house. Like one of those solar powered ovens used for demonstration purposes on Earth Day.

RE: Vinyl Siding

I've heard about this problem before!

Google "siding melting due to window reflection" and you'll find a LOT of articles about it.

Good luck!

RE: Vinyl Siding

that is one of the reasons i shot down vinyl real quick when my wife suggested it. her grandfather put vinyl on his house about 5 years ago. under his carport there are 2 spots where it has melted and warped. these are caused by the heat coming off his vehicles during summer. the way his carport is facing, there is no airflow under there and the heat rising just sits there. i like to grill year round, and if we went with vinyl then i would melt it the first winter or first rain whichever.

don't get me wrong, vinyl has MANY benefits, but i just don't like how easy it melts.

RE: Vinyl Siding

Holy sun beams, JoePa. I wouldn't have believed it but after reading your post and googling and seeing pictures/reading other stories of the same problem you have, I am a (shocked) believer now. Seems my instincts were correct that the neighbor window must be somewhat concave and that it isn't very unusual for windows to be that way, particularly vinyl framed windows.

From all I read your best hope is to ask your neighbors to install insect screens on the offending window(s) year round. That may diffuse the reflections enough to cool them down. Seems like they'd be glad to do that since they are wrecking your house. I'd feel sick to my stomach if my windows did that to a neighbor.

Otherwise, can you plant big evergreen trees or bushes to block the reflection? Around here it would cost several hundred dollars to have a full sized tree moved into place. Or replace the siding with hardiplank - very expensive. But if the window screen fails to soften the reflection enough, you really are needing to look into long term remedies.

I would defintely be contacting the siding manufacturer first off to see if they are obliged to help. That is one sorry product if you ask me. The manufacturer ought to be held accountable to replace all of your siding with something that can survive real world conditions.

Can you post pictures of your house for us to see?

RE: Vinyl Siding

I will be happy to post some pix but I do not know how. I tried to copy and paste but that did not work. Any thoughts?

RE: Vinyl Siding

I also have this same issue. My siding on my Norther facing wall is melting due to my neighbors southern facing windows reflection. After reading these post I wanted to add some comments:
This is not due to poorly installed product ( its a freaking Laser gun) if it was installation you would have this all over the house Not in just selected areas that follow the path of the sun as it traverse the Horizon... I fell like a freaking Inca priest tracking the celestial bodies... not cool.
I also have contacted the manufacture ( letter post will soon follow with their response letter). They will not cover this since it is not a manufacturing defect... ( its the result of a laser gun hitting my house for about 36 months) so obviously they will not do anything about this. Like Plastic ( vinyl is performing as expected) it will melt when It is heated to 160 degrees for 3 hours. Duh.....
The options provided in here are a bit lacking, for several reasons. If you replace with aluminum then you really need to do the entire house, not just one side.. unless you have a couple trucks in your front yard , with no wheels and tires and they're up on blocks... while if thats the case then you could / are probably ok with the whole ths covering idea, but if your like me and you want some level / degree of aesthetic with your house... then you really need to opt for an entire covering of your house with the same material, not just 1/4th.
If you replace with Hardie plank , or aluminum then you still have the issue of a freaking laser gun hitting your house and acting like a microwave oven creating a heat source that in effect will increase your cooling cost over the life of your house... not an option.....
this occurs when the offending glass is energy efficient glass and its reflecting on your wall. Typically the distance of the physical structures is distance is less then or equal to 15 feet
Solution is that the neighbor must replace the offending item with non-energy efficient windows.

RE: additional issues comments with Vinyl Siding

My neighbor's 2nd story windows ( two of them) are melting my vinyl siding. Apparently this is the result of low E Energy efficient double pane windows that when exposed to sunlight the thermal gas in these windows expands. The pressure from the heated gas drives the window paynes in opposite direction ( the gas acts upon the external glass and drives them apart) which in turn creates a sort of magnifying glass effect.

For the past 36 months I noticed slight distortion on my siding. I have discussed this with my Neighbor, whose house is 15 feet from my house. I have also sent a sample of the damaged product to the vinyl manufacture to see if this would be covered under warranty. CertianTeed identified this was not defective siding, but more likely a result of reflective light from a southern facing window that is being reflected on my Norther facing wall ( where the damage occurs).

I was able to get some more information about the cause of my distorted / melted siding. Apparently there are some issues with Insulated windows ( energy efficient windows) where the material between the glass ( the Gas) gets heated during the summer months ( sometimes winter as well). This heat causes the glass panes to expand slightly and thus create an effect similar to that of a magnifying glass

I was able to verify my theory of reflective light damage by use of thermometers, placing one in the effected area and several in the non-effected area. The results: The effected area thermometer reached a 150-170 degree value. While the non-damaged ( non-reflective ) areas maintained a temperature only slightly higher then that of the current temperature.

There are two issues with this, damage is ongoing and can not be repaired untill the neighbor replaces the windows and there is potential for fire if this is neglected.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Home Disasters Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here