Painting the roof

[BustedThumbs]

I'd like to change the colour of my roofing without ripping it all up and putting new stuff in. The stuff i've got at the moment is metal with boxed corrugations. Am i able to get the roof sprayed in a way similar to tiled roofs? Will i still be able to use the water collected from the roof for drinking? What sort of costs am i looking at? Help!!!

[Bloss]

Yes you can get it sprayed or otherwise re-painted.

As with all painting good preparation is the issue and that depends on the existing finish condition and type. Most times all that is needed is a good clean.

Plenty of business doing this, but many who are dodgy as too. Ask around locally and see if you can find someone who has had it done on a roof like yours.

Usual questions - how long in the business, ask to see work they have done recently and go and talk to those clients. If they refuse or have none then give them a miss.

[pharmaboy2]

yep.

I just redid my colorbond roof which was lovely shade of green - changed it to surfmist (colorbonds offwhite). I bought an airless sprayer off ebay for $500, and used dulux acrylic roof paint, and went ahead with spraying. Borrowed a friends high pressure cleaner first (a decent one not the crappy $200 jobbies they sell these days) to prepare the surface.

Of course, it will need redoing in 10 years, but i'm fine with that.

Plenty of painters have airless sprayers and will do it - though i would be inclined to pay them on estimated time - 2 guys one day, 40l of paint should cover it. If you want a warranty and a quote, my guess is the price goes up fairly exponentially, coz paint is funny, and possibly wont stick.

dont ask any company that advertises as "roof resoration" - they have more sales people than tradesman working for them.

All my opinion of course - I have a very high set 2 story place, and didnt want to pay for scaffold, so thats why i did it myself - but i'm competent on a roof, and even had a safety line (wind gust protection)

[DvdHntr]

Be careful. My mother in law had her's done and they stuffed up her roof. It leaked and it cost her plenty of cash to fix it.

[crackerwoody]

heres a basic rundown: first walk the roof along the battens, if any nail heads pop up when you step near them , pull them and replace them with tek screws , if any sheets have enough separation to allow wind to blow in water then screw them together with stiching screws or use rivets, then pressure clean the roof , making sure you blast under the capping to turn any dust into mud, this prevents debris from blowing out under the pressure of the airless and attaching to your wet paint. next use a metal primer, even if its prepainted or colorbond, i use dulux ultraetch, thinned slightly to allow for a key coat rather than a full paint coat, next paint around any chimney and gable flashings by hand to get it neat, then apply two top coats, ideally while the roof is cool to the touch, early morning is best, spray the roof top to bottom in one pass to avoid a join line in the middle. i use dulux acratex where possible, even though its more expensive. hope this helps

[munruben]

pressure clean the roof , making sure you blast under the capping to turn any dust into mud, this prevents debris from blowing out under the pressure of the airless and attaching to your wet paint.

If the roof isn't insulated, be careful not to force water under the metal cappings or where the metal sheeting overlaps causing damage to the ceilings. Industrial water blasters work on very high pressure, exerting far more pressure and volume of water than that of any storm.

[crackerwoody]

it takes a hell of a lot of water to damage a ceiling, more than you will produce from one clean, so as a trade off for a better job its more than worth it.