drdiy

Interior Condensation Problems / Copper Sulfate for Tree Roots in Sewer Line

In Uncategorized on January 31, 2018 at 12:53 pm

Q:

The lower 2-feet of a wall on the northwest corner of the bedroom develops heavy condensation, especially during the cold weather. The wall is wallpapered, however, even when the paper is removed, the condensation still forms. We are presently using a small fan to dry the area.

This bedroom, which is approximately 10’ x 12’ has only one heat register, which is on the north side. The roof has a 3’ overhang and there is a downspout on that corner and the water flows freely.

Do you have any suggestions on how we can correct this condition?

A:

Your problem is not unique; as a matter of fact, it is very common. As you’ve no doubt read in my column, “hot goes to cold”. It’s a fact of physics. Picture a glass of ice-cold lemonade on a kitchen table on a hot, humid summer day. (Sounds good right about now doesn’t it?) As you visualize the glass, note condensation dripping down the outside and pooling on the table. The glass isn’t cracked or leaking. Glass doesn’t sweat like people, so where is the moisture coming from? Answer: the hot humid air in the house collects on the cold glass and condenses.

In your case, that northwest corner is colder than the rest of the room and wall areas. Many people find the problem occurring on a back wall of an unheated closet. It’s often found on the wall behind furniture or up near the top of a wall near the ceiling. That’s because all those areas are colder than others. For example, the unheated closet has a colder outside wall. The top of the wall may have a problem because the insulation has settled. Behind the furniture, where there is either very little or no air circulation, the wall is colder.

The humidity in the air in your house gravitates and collects on those surfaces. Eventually mold starts growing on those surfaces and you know that can’t be good.

You need to add insulation to the exterior walls, at least in some areas. You also need to turn down your furnace humidifier. Ideally the relative humidity in your house should be between 35 and 45%. If you do not have, or are not using kitchen and bathroom exhaust fans that vent to the exterior of the house, you need to install and use them.

Finally, there are several good companies that do thermo-graphic imaging of houses. They can show you exactly where you are losing heat and how to correct the problem. It’s not as expensive as you would imagine. As a matter of fact, the cost is quite reasonable especially in light of what they can save you in cost energy dollars.

A couple of those companies that I am familiar with are:

Testing Engineers & Consultants- 248-588-6200

www.testingengineers.com

Infravision- 248-254-6474

www.infravisionllc.com

Q:

I just uncovered an old maintenance article of yours that recommended putting 3 teaspoons of copper sulfate down the drain each month. Do you still recommend that procedure or do you suggest a better method?

A:

As my grandmother used to say, “It couldn’t hurt”. Keep this in mind, if tree roots have already penetrated the sewer line, you are postponing the inevitable and that costs serious money.

You can learn about the condition of your sewer line if you are buying a house. That’s important if there are a lot of trees or even just one large tree on the property. You should call a plumbing company that is equipped with a camera that they run through the system. It will tell you the exact condition inside the pipe and if you will be facing a major expense and replacement.

If you currently have sewer problems, they will be able to show you exactly where the line is breached, how bad and how much. It’s better than digging up and replacing the entire yard. Speaking of that, if you are purchasing a house and if it has sewer problems, add the cost of some replacement landscaping onto the cost of the job. Companies charge between $100.00 and $250.00 to run a camera through the sewers. Call several for estimates.

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