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How to clean a concrete walkway Walter R. 03-05-2008
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Posted by BobR on March 5, 2008, 4:25 pm
> The 4' wide concrete walkway to my front door has become stained and
> unsightly. Part algae, part burn marks from burning palm seeds dropping on=

> it, part just a discoloration of unknown origin.
>
> If I use Clorox bleach on the concrete, that would be as starting point to=

> clean it up. My question is, will chlorine harm the concrete?
>
> --
> Walterwww.rationality.net
> -

A Clorox solution may help but is not effective on all stains. It is
most effective on mold and mildew stains. The best solution will be a
high-pressure wash with pre-treatment using the bleach.


Posted by Joseph Meehan on March 5, 2008, 4:48 pm
I agree with Bob. The bleach can kill it, but it will still need to be
removed and that is the job of the power washer.

When it comes to power washers it is all about BOTH the PSI -and- the
Gallons per minute.

--
Joseph Meehan

Dia 's Muire duit



>> The 4' wide concrete walkway to my front door has become stained and
>> unsightly. Part algae, part burn marks from burning palm seeds dropping
>> on
>> it, part just a discoloration of unknown origin.
>>
>> If I use Clorox bleach on the concrete, that would be as starting point
>> to
>> clean it up. My question is, will chlorine harm the concrete?
>>
>> --
>> Walterwww.rationality.net
>> -
>
> A Clorox solution may help but is not effective on all stains. It is
> most effective on mold and mildew stains. The best solution will be a
> high-pressure wash with pre-treatment using the bleach.
>

Posted by hallerb@aol.com on March 5, 2008, 4:52 pm
e:
> =EF=BF=BD =EF=BF=BD I agree with Bob. =EF=BF=BDThe bleach can kill it, but=
it will still need to be
> removed and that is the job of the power washer.
>
> =EF=BF=BD =EF=BF=BD When it comes to power washers it is all about BOTH th=
e PSI =EF=BF=BD-and- the
> Gallons per minute.
>
> --
> Joseph Meehan
>
> =EF=BF=BDDia 's Muire duit
>
>
>
>
>
> >> The 4' wide concrete walkway to my front door has become stained and
> >> unsightly. Part algae, part burn marks from burning palm seeds dropping=

> >> on
> >> it, part just a discoloration of unknown origin.
>
> >> If I use Clorox bleach on the concrete, that would be as starting point=

> >> to
> >> clean it up. My question is, will chlorine harm the concrete?
>
> >> --
> >> Walterwww.rationality.net
> >> -
>
> > A Clorox solution may help but is not effective on all stains. =EF=BF=BD=
It is
> > most effective on mold and mildew stains. =EF=BF=BDThe best solution wil=
l be a
> > high-pressure wash with pre-treatment using the bleach.- Hide quoted tex=
t -
>
> - Show quoted text -

too much pressure can roughen concrete, creating permanent marks and
easier mold re growth.....

you have been warned

Posted by BobR on March 5, 2008, 4:58 pm
ote:
>
>
>
>
>
> > =EF=BF=BD =EF=BF=BD I agree with Bob. =EF=BF=BDThe bleach can kill it, b=
ut it will still need to be
> > removed and that is the job of the power washer.
>
> > =EF=BF=BD =EF=BF=BD When it comes to power washers it is all about BOTH =
the PSI =EF=BF=BD-and- the
> > Gallons per minute.
>
> > --
> > Joseph Meehan
>
> > =EF=BF=BDDia 's Muire duit
>
>

>
> > >> The 4' wide concrete walkway to my front door has become stained and
> > >> unsightly. Part algae, part burn marks from burning palm seeds droppi=
ng
> > >> on
> > >> it, part just a discoloration of unknown origin.
>
> > >> If I use Clorox bleach on the concrete, that would be as starting poi=
nt
> > >> to
> > >> clean it up. My question is, will chlorine harm the concrete?
>
> > >> --
> > >> Walterwww.rationality.net
> > >> -
>
> > > A Clorox solution may help but is not effective on all stains. =EF=BF=
=BDIt is
> > > most effective on mold and mildew stains. =EF=BF=BDThe best solution w=
ill be a
> > > high-pressure wash with pre-treatment using the bleach.- Hide quoted t=
ext -
>
> > - Show quoted text -
>
> too much pressure can roughen concrete, creating permanent marks and
> easier mold re growth.....
>
> you have been warned- Hide quoted text -
>
> - Show quoted text -

Agreed, but followup with a concrete sealer should also be considered.

Posted by Oren on March 5, 2008, 5:19 pm
On Wed, 5 Mar 2008 13:58:11 -0800 (PST), BobR

>>
>>
>>
>>
>>
>> > ? ? I agree with Bob. ?The bleach can kill it, but it will still need to be
>> > removed and that is the job of the power washer.
>>
>> > ? ? When it comes to power washers it is all about BOTH the PSI ?-and- the
>> > Gallons per minute.
>>
>> > --
>> > Joseph Meehan
>>
>> > ?Dia 's Muire duit
>>
>>
>>
>> > >> The 4' wide concrete walkway to my front door has become stained and
>> > >> unsightly. Part algae, part burn marks from burning palm seeds dropping
>> > >> on
>> > >> it, part just a discoloration of unknown origin.
>>
>> > >> If I use Clorox bleach on the concrete, that would be as starting point
>> > >> to
>> > >> clean it up. My question is, will chlorine harm the concrete?
>>
>> > >> --
>> > >> Walterwww.rationality.net
>> > >> -
>>
>> > > A Clorox solution may help but is not effective on all stains. ?It is
>> > > most effective on mold and mildew stains. ?The best solution will be a
>> > > high-pressure wash with pre-treatment using the bleach.- Hide quoted text
-
>>
>> > - Show quoted text -
>>
>> too much pressure can roughen concrete, creating permanent marks and
>> easier mold re growth.....
>>
>> you have been warned- Hide quoted text -
>>
>> - Show quoted text -
>
>Agreed, but followup with a concrete sealer should also be considered.

I hope the OP gets the burns out of the concrete:)

Pressure washers, won't cut it.

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