I have upvc windows & always have condensation inside the windows. Only time that I don't have this problem is in the summer months when the weather is fine. I have had the windows for the last 12 years. Is also in the corners of my bedroom on the outside wall & black spots on the ceiling. Any suggestions?

I am using Fenesta UPVC sliding doors and windows. It's very good to use and long lasting. If you use wood or aluminum doors and windows then you need much maintenance which is irritating but, with UPVC you will never face this problem. I will recommend you Fenesta sliding doors.

LG Hausys is a leading UPVC window manufacturers in Delhi/NCR. They manufactures high quality uPVC casement windows and doors available in various designs. The address of this company is mention below-

Contact Person- Ms. Himani
Phone- +91-124-4212590
E-Mail- [email protected]
Site- www.lghausys.com/in
Gurgaon, Haryana
INDIA, 122001

Actually, you may have two issues. The drain hole may be clogged and the rear of the unit may not have enough downward tilt, to allow the water to flow to the rear of the drip pan and ultimately out thru the drain hole. The general rule of thumb is 1/4" to 1/2" rear downward tilt.

As far as the drain hole is concerned, it can be hard to find at times. Because the clog will often times blend in the drain hole. Patience & persistence are required in locating it. A pipe cleaner works well to clear the clog.

Troubleshooting the above should help to solve the problem. Thanks for choosing FixYa.