11:56AM | 03/17/05
Member Since: 12/16/04
16 lifetime posts
The carpet edge against the wall has continually become darker and darker. The carpet and house is only three years old with the general areas, wall, vents and registers show no sign of dirt. Carpets are vacuumed weekly and no other areas show this dirty. Carpet installer stated it may be an adjustment with the hot air heat. But registers etc do not show the dirt.

Any help will be appreciated.


12:42PM | 03/17/05
Member Since: 03/16/05
2 lifetime posts
have you checked to see if it is mold?

perhaps it is water intrusion or if you have hot air ducts in the wall there could be an air leak forceing air into the wall and it is escapeing with dust or moisture through the base of the wall.


01:34PM | 03/17/05
Member Since: 12/16/04
16 lifetime posts
Thanks for the reply, does not appear to be mold, but will have that checked.

Appears on all second floor walls interior and exterior..Filters also have been constantly changed..puzzled.


04:49AM | 03/20/05
Member Since: 04/10/03
116 lifetime posts
pest control company spray around the walls on the carpet?


05:21AM | 03/20/05
Member Since: 01/30/05
361 lifetime posts
perhaps where the line of the floors meet on the outside of your home (expansion joint) needs some re-caulking, and air/dirt or moisture/dirt is blowing/running in and wicking at the floor at this seam and wicking/broadcasting up the edge of the carpet. Perhaps this area isn't properly flashed to begin with? since this is only on outside walls and outside thresholds I suspect this may be the case. If you solve the problem, then pull up the carpet, vacuum well, clean the area, clean both sides of the carpet, and have it re-stretched back into place. other thought is that IF/when the carpet was installed, the floors/area where the baseboard meets the floor wasn't CLEAN, that the dirt is being broadcasted by the moisture on the perimiter walls (cool walls condensation issues from warmer more relative humidty in warmer air in room) and dirt/residue on the walls is being collected with the moisture, its running down the walls and being absorbed by the carpet. You mention its black, do you have a fire place, fuel buring appliances (Natural gas, Propane or fuel oil)? Do you smoke? Do you burn candles/incense? Maybe the walls need to be washed down more regularly? Are you in a heated climate? Airconditioned climate? Let us know if you have more questions, or find the cause/solution.


05:28AM | 03/20/05
Member Since: 01/30/05
361 lifetime posts
If you're vacuuming with an upright or a carpet attachment, are you doing the extra step of using the edge cleaning attachemnt and super sucking the edges near the walls? over time failure to do so will also display the effects you're describing as most carpet brush assemblies, even with their "edge cleaning" claims don't provide adequate suction to really pull up the dust/dirt from the very edge where the carpet is up against the baseboard. But since this is only on the second floor and only the outside walls, I still strongly suspect that the expansion areas where the second floor meets the first floor ceiling support area has an air leak, or water leak needs to be re-caulked, and that the infiltration is collecting on the carpeted edge which is acting as a sponge for the dirty water, or a filter for the dusty/dirty air at the perimeter edge of your carpets on the second floor. Three years is more than enough time for a slight shrinkage in materials to have taken place/ a slight shift, and if the caulk wasn't properly applied somewhere in the first place or non-existant - could explain the problem as well.


03:55PM | 03/21/05
Member Since: 12/16/04
16 lifetime posts
Thanks for everyones opinion.

Someone suggested the air fuel ratio on the gas furnace..I thought that this was a factory settings and did not need adjustment.

But if the air is picking up soot from the gas it makes sense.

Any thoughts.


04:33AM | 03/23/05
Member Since: 01/30/05
361 lifetime posts
shouldn't effect the air in your home if your furnace is properly vented. Perhaps you have a downdraft problem when the furnace first fires, I'd have it inspected and "tuned up" by a qualified technician and checked for CO (carbon monoxide) leakage ASAP if you suspect this. One really should have their furnace "tuned up", cleaned and inspected if a natural fuel burning system EVERY YEAR (although some say every-other year but if in a northern climate EVERY year) at the beginning of every heating season. Another possibility is that during construction, perhaps your return and feed venting acquired some "yuck"/dust/dirt and again its collecting/condensing on outside walls, running down, and concentrating on the carpets. A properly tuned/vented/adjusted system shouldn't throw that much soot in the air. Now, if you bought the wrong fuel oil, maybe.

1) If you haven't already done so invest in several good CO detectors for your home.

2) have the furnace tuned/cleaned/inspected

3) Replace the air filters on your furnace (you'll usually find them near the intake (from the return ducting system)

4) investigate the expansion joint zones on your home for need of caulking/re-caulking.

5) consider having your ducting system (feed AND return) cleaned by a professional service.

6) clean the carpet areas as previously recommended and observe.

personally I had an experience where before the joists for the second floor were hung, the construction carpenters layed them on their sides and used them to move around, getting muddy footprints on their sides, they then installed them without wiping them down. Same thing for the sub-floor, they never bothered to clean them off, just usually turned them OVER before installing, but in some areas there was black mud on the top. Then the carpet people just installed over the DIRT. Over time, I had the very same wicking situation, I also found that they had failed to properly flash a drip edge at the expansion joint, and had done a sub-standard caulk job, so the "dirt" was 2-fold, actual soil tracked in during construction on the sub-floor wicking up at the "rolled edge of the carpet, AND airborne dirt, etc. blowing/rain driven in from the outside. I spoke from experience there. Ended up having the carpet pulled up, cleaning the floor, backside of the carpet, pad, etc. then having the carpet re-stretched in place and cleaned again. problem solved.

Without MORE info from you as I asked previously, and/or your own investigation, I cannot help you further. "get thee a HVAC inspection, a ladder to inspect your expansion zone for repair, a CO detector, and consider the other things suggested.


04:49PM | 03/27/05
Member Since: 12/16/04
16 lifetime posts
Thanks everyone for your assistance. The house is only three years old and should not be having this type of problem..Will use suggestions and keep trying


07:43AM | 03/28/05
Member Since: 03/26/05
33 lifetime posts
We have been looking at homes lately to subdivision we looked at had 7 houses for sale and EVERY house had this dark edge to the carpets. We thought it was perhaps mold, but a couple of these homes had replaced the carpet as little as a year prior to going on the market! Common denominator: Some sort of tree planted in all the yards by the community landscape company was releasing pollen and every homeowner in the subdivision battled it. Strangest thing I've ever seen, but couldn't argue with it since most of the homes we looked at had different contractors, and that was what all the homeowners said. Something to think about...

Amanda Folster,Art Director
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