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Old 07-23-2009, 11:11 AM   #1
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Painting over builders grade exterior paint


I am painting the outside of house. It is 9 years old and has builders grade exterior paint. The paint has begun to go chalky. Most of my painting will be the two story soffits and siding that is on the second story (brick on most of first story). My questions are:

What is the best way to get rid of the chalk?

I assume that pressure washing is going to be one of the suggestions. How much PSI do I need? 1200psi, 2500psi, 3000psi...

How much of the chalk will pressure washing remove?

Will I be able to pressure was the 2nd story from the ground or need to get up closer with a ladder?

I plan to prime the exterior to ensure good bonding over the old paint.

What is a good primer to use?

The bigbox stores have Zinsser 1-2-3 for $20 and my other option the BM primer at $30

As for paint I plan to go with BM MoorGard.

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Old 07-23-2009, 12:45 PM   #2
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Painting over builders grade exterior paint


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Originally Posted by wolverine45 View Post
What is the best way to get rid of the chalk?
Power wash

I assume that pressure washing is going to be one of the suggestions. How much PSI do I need? 1200psi, 2500psi, 3000psi...
2,500 psi or higher

How much of the chalk will pressure washing remove?
all of it if you do it correctly

Will I be able to pressure was the 2nd story from the ground or need to get up closer with a ladder?
They sell extension poles but if you dont know how to use them you better get a ladder

I plan to prime the exterior to ensure good bonding over the old paint.
you dont need a bonding primer, just an exterior primer. Unless you are painting over a glossy surface. It is a safe way to go giving it a 100% prime but not necessary

What is a good primer to use?
Sherwin Williams A-100 acrylic primer is good enough

The bigbox stores have Zinsser 1-2-3 for $20 and my other option the BM primer at $30
I dont like Zinsser on exterior applications. BM is always a good product

As for paint I plan to go with BM MoorGard.
have at it

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Old 07-23-2009, 12:56 PM   #3
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Painting over builders grade exterior paint


Any experience with a "ladder saver"?

The thought of getting up on a 30ft extension ladder with water going everywhere does not excite me.

http://www.pressurewashersdirect.com...S55/p1922.html
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Old 07-23-2009, 01:03 PM   #4
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Painting over builders grade exterior paint


NO, that is just a 0 degree tip on a pressure washing wand, you will not get the pressure you need. plus, if you hit something from close up it will blast a hole in the wood or break a window.

sorry, your choices are ladder or extension pole.
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Old 07-25-2009, 08:35 PM   #5
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Painting over builders grade exterior paint


What is the best way to get rid of the chalk?
This comes from cheaper paints being used. TSP will help, but use low pressure when doing this.

I assume that pressure washing is going to be one of the suggestions. How much PSI do I need? 1200psi, 2500psi, 3000psi...
It is never about PSI when washing anything, but concrete. It is about water flow. Get one 4.5 GPM or better.

How much of the chalk will pressure washing remove?
If you use the right chemical you will have no problem.

Will I be able to pressure was the 2nd story from the ground or need to get up closer with a ladder?
They have telescoping wands you can use, but if you have a 4.5GPM water flow along with a higher HP engine you will be able to downstream atleast 30 feet or higher.

I plan to prime the exterior to ensure good bonding over the old paint.
Dull, clean and dry is the surface you need to have. If you have peeling and cracking paint you need to scrape off what is falling off. Then you can feather sand smooth.

What is a good primer to use?
Benjamin Moore

The bigbox stores have Zinsser 1-2-3 for $20 and my other option the BM primer at $30
Benjamin Moore. It has a very high content of Acrylic. When you wash your brushes out with soap and water. You have to rinse spirits through it in a 1 gallon empty paint can and then re rinse in water.

As for paint I plan to go with BM MoorGard.

You want to use this because of the low lustre?
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Old 07-27-2009, 01:27 PM   #6
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Painting over builders grade exterior paint


4ThGeneration

If it isn't about pressure then why even use a power washer? couldn't you get the same results from a garden hose?
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Old 07-27-2009, 09:50 PM   #7
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Originally Posted by NAV View Post
4ThGeneration

If it isn't about pressure then why even use a power washer? couldn't you get the same results from a garden hose?
Its about the chemicals used. the right chems can remove just about anything. I have a 4.5 GPM 3500 PSI with 14 HP pump. I clean about everything with a 0040 tip.

If you want an example it would be best to look here at some people I am friends with.


House Wash With A Ball-Valve And Down Streamer

Have a ball, no pun intended.

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