Water inside skylight

[Darrell Terry]

Noticed water between the plastic lenses of my skylight. Checked exterior lens and found no cracks or holes.
No stains or water entry noted to interior roof fabric. Aren't the skylights sealed units and if so how could water get inside.
Does this mean I need to replace skylight ?
Darrell

[Eric Maclean Co-Admin]

Darrell
When I replaced my sky light it was broken but when I removed it it was not a sealed unit the inside lense was taped in place and any water that gets by the outter roof sealing will get in on top of the inner seal or worse right into the ceiling.
Check your roof seal around the perimeter of the sky light for any spot it might be breached or not adhered to the roof
If your coach is like mine there is a spot that pools water along the front edge of the sky light and there fore that seal has to be checked regularly.
Hope this helps
Eric

[Fred Brooks]

   Darrell,
  Most skylights are 2 separate pieces. The manufacturer of the coach normally applies a layer of butyl tape between the inner and outer shells during the installation. Now fast forward 15 years and something has been compromised. All it takes is a pinhole to allow condensation to to form on the warm side during a 24 hour cycle.
   If the skylight is not cracked. I would drill a 1/16 hole in the inner shell at the best location to drain the condensation that has accumulated. Next remove the original sealant around the skylight and clean with denatured alcohol. Apply 2 applications of Dicor Non-self leveling sealer and smooth out with a throw away brush. Hope this helps, Fred

[Jerry Carr]

Darrell, on our 06 PT, I drilled a small hole on our bathroom skylight this did the job. I also cleaned and resealed the outside trim.

[Joel Ashley]

On ours, warm, moist summer air seeped between the panes and, year after year, condensed out over the winter.  It got worse with age.  At certain temperatures you didn’t see either fogging or pooled water.  But pooling increased each winter.  I couldn’t find with a magnifying glass where the thing was corrupted... bad seal or lens nano-crack. 

As others note, you may be able to drain it by drilling holes.  But that also provides a means for more moist air to enter.  We just had BCS replace the skylight as it wasn’t exactly an arm and a leg in cost, it’s routine for them so labor time was minimal, and anytime they do a job it’s probably better than factory.

Joel