[Malcolm]

This is exterior concrete block. I'm using SW superpaint. My 3 options are:

-Spray and don't back roll

-Spray and then back roll

-Hire someone to follow me around the house back rolling


If I do option 2, how much should I paint before starting to back roll? I don't want the paint to flash or start drying before I back roll it. Also, is this method a pain to do?

 

[chrisn]

I don't spray but am guessing that option 3 would be best

 

[wptski]

I've sprayed stain on cedar gable above a garage door using HVLP then back brushed it. This was off an 8' ladder so the worst part was switching back&forth. Used a Graco backpack pressure pot converted for HVLP so I attached something to hang the gun on while I brushed. Just reached as far as I could with each pass.

I think the worst part would be switching between if you do it all yourself. This would be harder with a roller I'd imagine.

 

[Gymschu]

Doable but so much slower than having a helper backrolling for you.

 

[wptski]

Doable but so much slower than having a helper backrolling for you.

What if you are ambidextrous?:biggrin2:

 

[ToolSeeker]

Has the block been filled or painted before? If the answer is no then it's going to be slow going. I would use an airless with a big tip and have someone follow you with a large nap roller.

If it's been painted then you have more leeway. Here in Fla the days are already hitting the 90's so I would still have someone following with a roller but could be a smaller nap roller and a smaller spray tip.

 

[lexdiamond20]

Why is back-rolling necessary when spraying?

 

[wptski]

Why is back-rolling necessary when spraying?

To insure the material gets into the texture of the substrate.

 

[Malcolm]

Thanks

I purchased a 515 tip today. I might end up having a guy follow me back rolling. I've read a lot about back rolling vs not. Some people seem to do fine without it. I'm still kind of up in the air about it.

I'm also worried about getting runs from where the mortar joints are. I brushed a few blocks to test out paint colors and noticed some dripping coming a couple of areas. I must have applied too much paint.

 

[ToolSeeker]

Thanks

I purchased a 515 tip today. I might end up having a guy follow me back rolling. I've read a lot about back rolling vs not. Some people seem to do fine without it. I'm still kind of up in the air about it.

I'm also worried about getting runs from where the mortar joints are. I brushed a few blocks to test out paint colors and noticed some dripping coming a couple of areas. I must have applied too much paint.

Depends on what your painting and the effect you want. Just as your block is it smooth or rough? has it already been painted before? The kind of paint makes a difference on bankrolling or not. Plus your experience spraying makes a difference.

 

[Malcolm]

Depends on what your painting and the effect you want. Just as your block is it smooth or rough? has it already been painted before? The kind of paint makes a difference on bankrolling or not. Plus your experience spraying makes a difference.

It has been previously painted and the block is smooth. I'm using superpaint and I've never sprayed before.

 

[ToolSeeker]

Since the block is smooth you may not need to back roll. Super paint is not one of your really fast drying paints so you have a little bit of working time. You might try a small wall and see which effect you like best. Also you can get a power roller attachment that replaces the gun on your sprayer. Just pull the trigger it loads your roller and you can just keep on rolling. No dipping, no pans,comes with I think 4' extension, A little slower than spray but more control and no overspray to worry about and no need to back roll.