Spraying exterior paint

lostinrates

I thought I might have asked this before, but couldn't find it on search.

We have large areas of exterior breeze block to paint (several walls and buildings) and have been wondering whether hiring a spray apicator might be easier and better than trying to roll it all?

Some has been painted before but some has never been painted, when we have done this before we found several coats were needed, I think four or five.

Also, could we spray normal exterior paint over corrugated asbestos sheeting? Its in food, stable condition, no damage, just ugly. Its going to be there many years, obviously removing it is a big deal, so making it look better would be nice. If it could match the walls it would be much nicer.

Gloomendoom

You can spray anything over anything. In my experience, unless you are OCD with masking up, you will get paint on everything in the immediate vicinity. This is particularly true when spraying outside with slow drying paint.

Also, paint has no respect of property boundaries. It will quite happily coat your neighbours' cars, washing, windows, walls, garden furniture, children, pets etc.

A roller is much less stress.

lostinrates

Gloomendoom wrote: »

You can spray anything over anything. In my experience, unless you are OCD with masking up, you will get paint on everything in the immediate vicinity. This is particularly true when spraying outside with slow drying paint.

Also, paint has no respect of property boundaries. It will quite happily coat your neighbours' cars, washing, windows, walls, garden furniture, children, pets etc.

A roller is much less stress.

Thanks!

No neighbours to worry about, these are farm buildings mainly. So if we rollers near the old listed buildings for the sake of safety might spraying on the long runs of breeze block might be worth considering? We are talking runs of at least 30 metres, and over a dozen of them, so hundreds of metres of painting in all, so any labour saving is going to help . We know we probably won't get it all done this years as it is.

leveller2911

Pop into your local branch of Brewers decorators merchants.

They can give you good advice on what type of sprayer and which paints to use and I'm pretty sure some hire shops hire the sprayers out.

You will probably need an "airless pump" ( no compressor needed,paint is just pumped through the machine) to spray rather than HVLP (High velocity-Low-Pressure very fine mist of paint with a fair amount of overspray) or air-assisted-airless pumps (mixture of airless and HVLP).

Jonesya

How smooth is the surface of the breeze blocks?

I've painted rough interior block work and I doubt a roller would have filled all the crevices with paint leaving some unpainted spots.

lostinrates

Jonesya wrote: »

How smooth is the surface of the breeze blocks?

I've painted rough interior block work and I doubt a roller would have filled all the crevices with paint leaving some unpainted spots.

Very rough.

The areas we have done were a night mare. We did as good as possible without going crazy first coat, very, very thorough second coats, (as was very much clearer where we had missed) and prayed on future coats.. It seems painting over painted ones is much better, but the 'raw' ones are shocking (and soak up paint as well as being rough to paint)

lostinrates

leveller2911 wrote: »

Pop into your local branch of Brewers decorators merchants.

They can give you good advice on what type of sprayer and which paints to use and I'm pretty sure some hire shops hire the sprayers out.

You will probably need an "airless pump" ( no compressor needed,paint is just pumped through the machine) to spray rather than HVLP (High velocity-Low-Pressure very fine mist of paint with a fair amount of overspray) or air-assisted-airless pumps (mixture of airless and HVLP).

Thanks, this is really useful.

Sadly our brewers, who I go to a lot, are very, very unuseful and having been mi sold things by them several times now feel untrusting of them. Its a great shame because if anyone needs advice its me!:D

leveller2911

lostinrates wrote: »

Thanks, this is really useful.

Sadly our brewers, who I go to a lot, are very, very unuseful and having been mi sold things by them several times now feel untrusting of them. Its a great shame because if anyone needs advice its me!:D

Any "Trade Paint" shops close by?.

lostinrates

leveller2911 wrote: »

Any "Trade Paint" shops close by?.

Google suggests places called Johnstone and sydonems ( sorry, almost certainly spelt latter incorrectly). Either of those any good?

leveller2911

lostinrates wrote: »

Google suggests places called Johnstone and sydonems ( sorry, almost certainly spelt latter incorrectly). Either of those any good?

Not sure TBH so your best bet is to spend an hour or so on google ..Sorry I can't be of more help

lostinrates

leveller2911 wrote: »

Not sure TBH so your best bet is to spend an hour or so on google ..Sorry I can't be of more help

No. You've been great, given direction. Thanks!:)