2017 was our 20th year online!

Welcome to the Piano World Piano Forums
Over 3 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Shop our online store for music lovers
SEARCH
Piano Forums & Piano World
(ad)
Wessell Nickel & Gross
PianoForAll
(ad)
Best of Piano Buyer
 Best of Piano Buyer
(ad)
Faust Harrison Pianos
Faust Harrison 100+ Steinway pianos
Who's Online Now
51 members (Ajax69, Beowulf, Carey, 3B43, clothearednincompo, Beemer, bobrunyan, 13 invisible), 471 guests, and 419 robots.
Key: Admin, Global Mod, Mod
(ad)
Estonia Pianos
Estonia Pianos
Previous Thread
Next Thread
Print Thread
Hop To
What Is Felt Worm or Feltworm?
#2285940 06/05/14 04:34 AM
Joined: Sep 2007
Posts: 10
R
rameish Offline OP
Junior Member
OP Offline
Junior Member
R
Joined: Sep 2007
Posts: 10
I live in Singapore, my new piano technician (I'm using him for the 2nd time as the guy who used to do the job previously is in his 90s and is a little hard of hearing I think). Anyways the "new" guy in his 40s just finished tuning my upright. He then pointed out that there's some mild rust build up around the tuning pins and asked if I wanted to clean it up. So we made another appointment and after using one chemical to clean and another two to slow down the rust from reappearing he pointed out that "felt worms" were eating away at the felt rings that sit on the pins. Anyway after removing all the keys he vacuumed all the little "dust" (basically felt worn [censored]) and said in a couple of years those little rings need to be replaced when the keys exhibit to much lateral movement (left to right movement). He also showed me how some of felt on the "keyholes" the holes just above the "ivory" had also been eaten away. He attributes it to being too damp so he installed another dehumidifier rod - so now I have two rods and he repositioned the rods to almost the bottom of the piano - quite near the pedals. First what are felt worms? he said these are not wood worms or termites (and I clarified with him on that matter).

Anyways the piano is in excellent shape now - I live in a very humid (75% -80%) environment thats hot all year long 28 degrees Celsius (83 degrees Fahrenheit)

(ad)
Piano & Music Accessories
piano accessories music gifts tuning and moving equipment
Re: What Is Felt Worm or Feltworm?
rameish #2285986 06/05/14 08:24 AM
Joined: Jun 2011
Posts: 581
C
500 Post Club Member
Offline
500 Post Club Member
C
Joined: Jun 2011
Posts: 581
Rameish,
It sounds like you have a wool-moth infestation. The "worms" are the pupal stage, maybe you saw some of their discarded husks during vacuuming. Have you seen any little white moths fluttering about? Be sure to check your closet as they may well be into your clothes by now. I thought that all new felts were treated with moth proofing, but I suppose they have evolved to thrive on it. Try some moth balls, camphor, under the keys.

Be well,

Craig


Craig Hair
Hampshire Piano
Chesterfield, MA
Conservative Piano Restoration
Watch us on YouTube

Whatever you need, someone, somewhere, is throwing it away.
Re: What Is Felt Worm or Feltworm?
Craig Hair #2286396 06/06/14 12:05 AM
Joined: Sep 2007
Posts: 10
R
rameish Offline OP
Junior Member
OP Offline
Junior Member
R
Joined: Sep 2007
Posts: 10
Craig, no moths of any colour fortunately. The piano is used quite a bit on a most days as the 3 of us at home play the piano. Piano tech calls it "felt worm" he says all pianos in Singapore's hot and humid climate will get it - he installed another heater (heating rod). But I've never heard of "felt worms" I've always thought that I've never scrimped on servicing my piano so am a bit puzzled. Anyway I did an overhaul of the "engine" where are the hammers are - took him a week to bring it back - I guess that's regulation that was done in June 2012, the piano tuning pins are now clean deoxidisation and minor regulation done this June 2014. I tune my piano four times a year is there anything else I need to do?
Any advice would be welcome. Thanks

Re: What Is Felt Worm or Feltworm?
rameish #2286432 06/06/14 03:33 AM
Joined: Mar 2008
Posts: 9,230
O
9000 Post Club Member
Offline
9000 Post Club Member
O
Joined: Mar 2008
Posts: 9,230
Products against pests that eat wool (moths) can be used.

Impregnated papers small boxes ,there are different types.

you have conused 2 things. Lateral play due to bushing cloth in key mortises (or wear) and moth larvae eating the felt tings under the keys (punchings).

When there are enough moths or 'worms' they raise in the key front mortises then in the balance mortises then higher in the action. Up to the hammers in the last state of infection.

it is said that a daily played piano will not be infested but I have seen the case. Possibly infeststion is less large only.


Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!
Re: What Is Felt Worm or Feltworm?
rameish #2286449 06/06/14 04:54 AM
Joined: Sep 2007
Posts: 10
R
rameish Offline OP
Junior Member
OP Offline
Junior Member
R
Joined: Sep 2007
Posts: 10
Olek,

Thank you very much. I believe you're asking me to impregnate the wool with insecticide, let it dry and then ask the piano tech to replace the wool/felt discs/rings. I suppose that would work - the good news is that the felt hammers have not been affected - i guess because the piano is in daily use. Isn't the bushing cloth also made of felt?

Anyway thank you both - if i know the insect then i can use an appropriate insecticide. Will research wool worms now not felt worms.

Re: What Is Felt Worm or Feltworm?
rameish #2286876 06/07/14 04:49 AM
Joined: Mar 2008
Posts: 9,230
O
9000 Post Club Member
Offline
9000 Post Club Member
O
Joined: Mar 2008
Posts: 9,230
Hello, Not particularely, I believ using the usual insecticides can be used in the piano without spraying something on the felts.

It is not a good idea to use spray in an action (may be with a brush.)

Now changing the felts punchings will be necessary if they are too much eaten. if the larvae are killed it may not be urgent.
It is not expensive repair (the keys bushings (woolen cloth indeed) are more expensive to repair - if the pests are yet within the key mortises the infestation is yet large, (and they did eat much of the balance an front "rings" - hammers are really the last stage after years of negligence.

Changing the front and balance punching is not very expensive but the whole key level and key dip have to be regulated (an the new punchings settle somehow to stabilize)
If you have killed the pests you can budget for that work.
If they are moths you may see some flying occasionally.

It is said that new punchings are moth resistant may be only with the stains, anyway the moth only get there after some years, may be a decade.

Moths larvae like (humid ?) dark and warm places, where they can live all year long. I ont know if they are ery resistant, they can be killed by naphthalene bowls , for what I know (it generates a gaz - do not live them too long as it can be corrosive, I heard - probably one month should be enough, even less) Ideally put them under the keys if you can.
More actual insecticids may work as well probably.



Good luck







Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!

Moderated by  Piano World 

Link Copied to Clipboard
(ad)
Pianoteq
PianoTeq Karsten Collection
(ad)
PianoDisc

PianoDisc
(ad)
Piano Life Saver - Dampp Chaser
Dampp Chaser Piano Life Saver
(ad)
Mason & Hamlin Pianos
What's Hot!!
News from the Piano World
Our October 2020 Free Piano Newsletter is Here!
---------------------
3,000,000+!
------------------
Posting Pictures on the Forums
-------------------
Forums RULES & HELP
-------------------
ADVERTISE on Piano World
New Topics - Multiple Forums
New DP Buyer Needs Help :-)
by Badger1966 - 10/21/20 09:12 AM
Kawai es920 - record onto Android Smartphone
by big-vern - 10/21/20 04:51 AM
MP11SE in stock at bhphoto.com
by mivaldes - 10/20/20 10:35 PM
most common non ET temperaments in 2020?
by MartF - 10/20/20 08:56 PM
Download Sheet Music
Virtual Sheet Music - Classical Sheet Music Downloads
Forum Statistics
Forums41
Topics202,335
Posts3,015,689
Members98,966
Most Online15,252
Mar 21st, 2010
Please Support Our Advertisers


Faust Harrison 100+ Steinways

Dampp Chaser Piano Life Saver

 Best of Piano Buyer

PianoTeq Bechstein
Visit our online store for gifts for music lovers

Virtual Sheet Music - Classical Sheet Music Downloads



 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
| Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter |


copyright 1997 - 2020 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission
Powered by UBB.threads™ PHP Forum Software 7.7.4