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Proper Bathroom Construction Sequence Dear James: I am adding a bathroom to my house and doing most of the work myself to save money. What is the proper construction order so that I do not waste time? What items should I consider in the design phase? — Michelle H. Dear Michelle: …Read more. How to Build a Privacy Panel Fence Dear James: I just moved into a house with a small lot. I would like some privacy in the backyard, so I want to build a panel fence. The yard slopes, so please give me some advice on building it myself. — Ron P. Dear Ron: There are several …Read more. It Is Easy to Replace a Garbage Disposal Dear James: With three children, my old garbage disposal gets a good workout. After 10 years, it finally gave out. Is this something that I can replace myself? If so, please give me some tips on doing it. — Aimee G. Dear Aimee: Installing a …Read more. Repair a Low-Pitched Roof with a Membrane Dear James: I have an older house. The attic was converted into a Cape Cod-type bedroom for children. The old asphalt rolled roof is leaking again. What do you suggest as the best method to fix it? — Mike G. Dear Mike: Your problem is …Read more.
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Stop Annoying House Sounds


Dear Pat: I have lived in a new house for about one year now. Whenever I use a lot of hot water or the furnace/air conditioner comes on, I hear squeaks and knocking sounds. What is it, and how can I stop it? — Gina P.

Dear Gina: Those sounds you described can be quite loud and a little scary for children. I can still recall spending the night with my grandparents when I was a child. Their plumbing and heating system made many strange, frightening noises, which kept me awake and anxious all night.

Most of the knocking sounds you are hearing are from the water pipes expanding and contracting as hot water runs though them. First they heat up and expand, and then they cool down again when you turn the hot water off. The sounds are usually louder when you turn the water on because they heat up much faster than they cool back down.

The copper supply pipes expand some, but not as much as the plastic (PVC) drain pipes. Plastic expands much more with temperature increases than does metal. Most new houses use PVC pipe today, so you can expect to always have a few sounds, but not at the annoying level.

For those of you who are planning to build a new house, consider installing cast iron drain pipes instead of plastic. It is more expensive, but it will virtually eliminate these sounds. Cast iron pipe also reduces the sound of the water running through them. This can be a great advantage, particularly for second-floor bathrooms.

Another source of the noise is caused by the pipes rubbing against floor and wall joists as they expand and contract.

If the builder was not careful to support the plumbing properly or saw large enough clearance holes for it, you will hear a squeak or a ticking sound as the pipe rubs against the wood.

There really is no simple fix for this problem. The best you can do is try to locate the spots where the sound seems to be the loudest and most annoying. Remove a section of the drywall to gain access to the suspect pipe. Support it better so it does not touch the lumber framing.

Making the holes in the lumber a little large will provide more clearance around the pipe and may stop the rubbing. Be careful not to enlarge the clearance holes too much because it weakens the joist or stud. Check with your local building inspections department for the maximum allowable hole sizes.

The sound when the furnace starts is somewhat similar to the pipes. The ducts will grow and shrink as they warm up. Support them properly so they don't rest against the lumber. Also, secure all the duct joints, because this is a location where one piece will slide against another — squeak!

A loud knock when the furnace starts and stops may be the sides of the large main ducts buckling in and out. This is sometimes called "oil canning." The increasing and decreasing air pressure inside the ducts causes this to happen, usually in the large flat ducts near the furnace.

Screw some long, heavier sheet metal supports along the duct faces that are oil canning. Sometimes, just putting small dimples in the face with a hammer will make it rigid enough to stop the noise.

Send your questions to Here's How, 6906 Royalgreen Dr., Cincinnati, OH 45244 or visit To find out more about Pat Logan and read features by other Creators Syndicate writers and cartoonists, visit the Creators Syndicate website at



4 Comments | Post Comment
Its true that noisy voice from pipes are so bad to hear. Several different noises can come from our plumbing system. If you hear the sound whenever you turn on the water, the pipes are probably striking against something. In this situation we need to take help of expert such as professional plumber.
Comment: #1
Posted by: Plumbing Fremont
Fri Sep 12, 2014 2:06 AM
Annoying sound from pipe is not a right thing for effective plumbing system. We should take action against it as soon as possible.
Comment: #2
Posted by: Plumbing Fremont
Wed Sep 24, 2014 5:23 AM
Bad sound from our plumbing system is not good. It may be convert into a big problem and damage our property if we shall ignore small problem.
Comment: #3
Posted by: Plumbing Fremont
Thu Sep 25, 2014 3:10 AM
Annoying sound are so irritating to hear. Bad sound from our plumbing system may cause big issues for our plumbing. It may be convert into a big problem and damage our property if we shall ignore small problem.
Comment: #4
Posted by: Plumbing Fremont
Fri Sep 26, 2014 4:42 AM
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James Dulley
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