[alantoomey]

finnished a job today there was darkish line or streaks in a section of the carpet seemed to improve as it dried but concerned about this type of reaction can any one help with preventitive or remedial mesures

[gwrightson]

Alan,

it does sound like streaking from overlapping , simply the streaks are wetter, a pass with the wand using dry strokes should iradicate this problem .

Geoff

[Paul Moss]

Wick back. There must be loads of dry muck in the base. A good pre vac before hand or you wiall have to do plenty of passes to remove it all. Unless you have a truck of course 

[peter maybury]

other posibility is draught marks through floor boards. There are several posibilities but it is not possible to say specifically without more information.
Peter
www.carpetcleanercardiff.com

[craignozza]

Was the underlay in good condition because this happened to me and it turned out to be the underlay had totaly perished underneath and the suction from the vac hose was pulling it up inbetween the floorboards and mixing water with it was making  it stick to the carpet  but once the carpet drys it should dry out the underlay  and it will fall back down through the floorboards ..( well thats the plan )

[gwrightson]

Paul,   i doubt it will be wick back,   wick back is normaly from spills where a stain is already or previously been apparent, i doubt would show as lines.


Peter.   If it was draught marking in most It would have already have been visable, I do agree could have been drawn to the surface how ever.

Craig,   I doubt whether perished underlay would show it self as lines, or dissapear on drying.

From what Alan said " improving on drying "  the darker streaks imo   are wetter areas ,having said this  a pic would have been handy.

Geoff

[Helen]

Could be a poor spray pattern from the jets.
If it's reasonably strong spray in one area but weak elsewhere you will see this effect happen.

[Jim_77]

Could be wrong, difficult to work it out from the info given but sounds like the good old "Black Death" to me.

High loading of dry soil at the base of the carpet pile which you can't see before you start.  Was it an area close to a doorway leading in from outside by any chance?  When you're extracting it's washing it up but your system/machinery/technique hasn't done enough to get it out.

The old guard will tell you that you should spend half your life trying to get it out with a vacuum cleaner but after a few years of that not making the slightest bit of difference you soon learn to tackle it from a different angle

If it happens again, swap to your hand tool, make sure your pump is turned up full and give it the beans.  Depends how much grunt you're working with as to how well it turns out tbh

[Paul Moss]

Could be wrong, difficult to work it out from the info given but sounds like the good old "Black Death" to me.

High loading of dry soil at the base of the carpet pile which you can't see before you start.  Was it an area close to a doorway leading in from outside by any chance?  When you're extracting it's washing it up but your system/machinery/technique hasn't done enough to get it out.

The old guard will tell you that you should spend half your life trying to get it out with a vacuum cleaner but after a few years of that not making the slightest bit of difference you soon learn to tackle it from a different angle

If it happens again, swap to your hand tool, make sure your pump is turned up full and give it the beans.  Depends how much grunt you're working with as to how well it turns out tbh

This is exactly what it is.

Geoff its called dry muck wick back :-) as said above if you have a porty then vac it to death first, if you have a truck you can flood wand it and it will extract after a few passes.

[Paul Moss]

Oh and Jim, thats not black death blue . You have prob nor experienced it yet with yer truck but when you do you will certainly know about it  and so will your customers walls