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Condensation on Windows

By
Home Inspector with Comprehensive Building Inspections & Consultants

I got a call from a landlord that is having a mold problem in one of her rentals. The problem has her in L&T court.

After cleaning the mold, it reoccurs. She has informed me that the windows are sweating quite a bit, which by the way, are the problem areas.

I asked her if she home had single pane or insulated glass windows, she was unable to answer the question.

At this point, I have no clue about the construction of the building or what I will be facing until I look at it tomorrow. I have been considering different possibilities, they include: non insulated glazing,lack of storm windows, faulty frames, metal frames, metal frames w/o thermal break, windows blocked from ventilating, improper venting of a gas appliance, leaking steam pipe, improper moisture barrier.

She did tell me that the heating system was recently serviced, but until I see it with my own eyes, I consider that hearsay.

Does anybody have any input?

I will post pictures tomorrow.

Marchel Peterson
Results Realty - Spring, TX
Spring TX Real Estate E-Pro

Hi Steven,  It will be interesting to see what you come up with.  In the Houston area we just started getting double paned windows since 2001.  We have our fair share of mold problems though.

By the way I'm in your neck of the woods right now visiting my daughter.  We just went to see the Lion King today.   

Jan 19, 2008 01:14 PM
Erby Crofutt
B4 U Close Home Inspections&Radon Testing (www.b4uclose.com) - Lexington, KY
The Central Kentucky Home Inspector, Lexington KY

I looked at one of those types recently.  Turns out momma was constantly boiling water to increase the humidity and had another pot of water sitting on a radiator to do the same.  Moisture was everywhere and mold was in all the poor circulation areas.

She needed to decrease the humidity to below 50% but I doubt she did.  I think she was looking for a "mold is gold" lawsuit.  I doubt she'll ever get it when it's here that is causing the problem.

Jan 19, 2008 10:41 PM
Gene Allen
Fathom Realty - Cary, NC
Realty Consultant for Cary Real Estate
My guess would be it is just normal for the type window she has.  Single pane without a storm or if she has a storm then the drain holes are plugged.
Jan 20, 2008 04:37 AM
Steven Turetsky
Comprehensive Building Inspections & Consultants - Staten Island, NY
Building Moisture Analyst

Hi Marchel, I hope you are enjoying NY, the Lion Kong must have been great!

Erby, You hit the nail on the head, but there is a little more.

I got a chance to look at the situation first hand. The house is a semi attached, brick, 4 family, I'd guess it's about 60-70 years old.

All of the tenants have court action against the landlord. The landlord insists she is doing everything to give the tenant proper heat, and that they are simply trying to avoid paying rent. The present landlord owns the building about 1 year. Her son lives in the building.

Landlords complaint: Condensation accumulating on windows causing mold. States she leaves heat set at 74F constant.

Tenants complaints:

Apt 1F - Tenant states no complaint and that she is not part of the court action. Landlord states she is part of the action and denies it because she has extended family living in the apt and didn't want us entering apt.

Apt 1R - No complaint, occupied by tenant's son.

Apt 2R - Tenant complains one room is cold, remainder of apt ok.

Apt 2F - Tenant complains of condensation on windows, lack of heat throughout the night, one room is colder than all of the others and gets colder faster than remainder of apt. Also stated that when the heat is on, it works fine. But does not come often enough or at all.

Observations:

Steam boiler properly installed and maintained. No signs of improper combustion or venting that would cause excessive condensation. Thermostat is located in the first floor hallway. Set at 72F All windows are made of vinyl with insulated glass, in good condition. Minimal draft at windows.

Apts 1F, 1R, 2R show no signs of condensation on windows. 70F-72F.                                                   

Apt 2F - Heavy condensation on all windows, radiator in kitchen is blowing off steam, two pots with water in them on top of stove, all windows are covered. Temperature in main area of apt is 70F, temperature in front bedrooms is 67F. Tenant states she boils water to heat apt.

Conclusions:

Thermostat is poorly located. It is above the basement door above the boiler, in a hallway that is protected by two exterior doors. It does not sense the actual temperature of the area it is servicing.

Radiators need to be properly balanced, in order to bring more heat to the problem rooms.

Because of the age of the building, I believe that there is no or inadequate insulation. The building is failing to maintain heat.

Recommendations:

Balance heating system.

Install remote sensors to thermostat. Since there are 4 separate areas to monitor and the system is on a single zone, each area will require it's own sensor. The sensors should be wired parellel to the thermostat. The only draw back to this method is that the entire system will turn on, even if only one area is calling for heat. This is why proper insulation and balancing the system is important.

The only alternative would be to re-zone the entire system or to re-zone and install dedicated heating systems for each apt. This solution is costly, but the advantage of installing individual systems is that after the initial investment, the landlord would be able to have each tenant control thei own heat and pay their own utility bill.

Insulate exterior walls.

Stop boiling water to heat apt.

Uncover windows to allow air to circulate and absorb condensation. 

 

Another day at the office.

 

 

 

 

 

 

Jan 21, 2008 03:48 PM
Bob Elliott
Elliott Home Inspection - Chicago, IL
Chicago Property Inspection

Excellent posting on this thread Steve.

Miss you guy's

Hope business is good for you.

Send me a PM when you get a chance to catch up.

Gold star

Jan 22, 2008 03:34 AM
Joseph Lang
Pillar To Post Professional Home Inspection - Rancho Cucamonga, CA
Home Inspector, Southern California
Steven, interesting post.  Thanks for coming back and updating us on your observations and recommendations.  It's never a dull day out there.
Jan 22, 2008 08:56 AM
Carl Winters
Canyon Lake, TX

Hey Steven - Sure have been missing you; also some that responded; don't stay away, we need to pull together. I know, time is short these guys.

Interesting blog and update. Appears they are going to have some costly updates.

Jan 23, 2008 12:42 AM
Steven Turetsky
Comprehensive Building Inspections & Consultants - Staten Island, NY
Building Moisture Analyst

Hey Brad!!!!

 

How are you doing? How is your scar??

Jan 23, 2008 11:13 AM
Steven Turetsky
Comprehensive Building Inspections & Consultants - Staten Island, NY
Building Moisture Analyst
Well, there is never a dull moment or lack of delemmas. But all is ok. I am trying to set myself up to leave my day job. I am trying to do what you do... and a bit more. I will fill you in in a pm.
Jan 23, 2008 11:23 AM
Steven Turetsky
Comprehensive Building Inspections & Consultants - Staten Island, NY
Building Moisture Analyst
Well, there is never a dull moment or lack of delemmas. But all is ok. I am trying to set myself up to leave my day job. I am trying to do what you do... and a bit more. I will fill you in in a pm.
Jan 23, 2008 11:23 AM
Steven Turetsky
Comprehensive Building Inspections & Consultants - Staten Island, NY
Building Moisture Analyst

Yes it has been a while, I respond later.

 

good to hear from u

Jan 23, 2008 11:30 AM
Bob Elliott
Elliott Home Inspection - Chicago, IL
Chicago Property Inspection
Glad to hear it is picking up .
Jan 23, 2008 12:00 PM