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Hello @condruss
It's great that you've received excellent suggestions from @TedBear and @MitchellMc. If you are going to paint your powder-coated ceiling, I suggest using the Dulux 4L PRECISION Maximum Strength Adhesion Primer White. This would be the ideal primer to use as it is formulated to work on difficult surfaces to paint. However, I suggest speaking to your local store's paint specialist about the textured paint and see which one will be ideal for your situation.
I recommend using the Dulux 4L Medium Texture Exterior Paint. Your goal is to create a surface with the maximum amount of hills and valleys in your texture. This will prevent the moisture from joining together to form condensation. Please keep us updated, we look forward to seeing your ceiling textured and moisture-free.
If you need further assistance, please let us know.
Eric
Hi @condruss,
A scrub down with a broom and SugarSoap would be sufficient to clean the area prior to priming. Make sure you rinse the SugarSoap off with fresh water. You might also like to use a pressure washer to speed the process along or if there is a heavy buildup of grime.
I'm sure @EricL will get back to us if there is anything else to add.
Feel free to call your local store, I'm sure their Paint Specialist would be more than happy to discuss this over the phone. Dulux also has an amazing Live Chat on their website for technical assistance. I often find myself taking advantage of it.
Mitchell
Welcome to the Bunnings Workshop community, Matt @shawmat. It's fantastic to have you join us, and many thanks for jumping into the conversation.
I'm happy to elaborate. What did you require more information about? The process I explained above involves having insulation placed against the underside of the sheets and enclosing the roof structure. This reduces the extreme temperature difference the sheet experience going from frigid nights to sun-warmed mornings. The setup is more similar to what you'd see inside a house's roof instead of a patio.
I'm keen to hear more about this white salt-like buildup and see some images of what you're working with.
Mitchell
Hi Mitchell
Have attached photos above of existing setup. Hope this helps to portray issue a bit better.
Cheers
Matt
Hello @shawmat
Thank you for posting the photos of your patio. I suspect that these are mineral deposits left by the water condensation on your patio frame. Have you tried to brush them off or are they difficult to remove? If enough minerals are deposited, they will become very difficult to remove as they will start to attach themselves more permanently to the frame.
Earlier in the discussion, we were exploring possible methods of preventing condensation from forming on the underside of the patio roof. Some of the suggestions offered are below.
- Install sarking or Insulation batts to be cladded over with HardieFlex.
- Use Moroday 750 x 10mm x 1.8m Adhesive Foam Roll.
- Apply Textured Paint to prevent the condensation from joining together, creating water droplets.
- Build a proper ceiling enclosure.
- Use Bristol 750mm Wall Industrial Wall Fan to increase wind flow, and dry off the condensation before it forms.
If you have any other questions, please don't hesitate to post them. Our members will be more than happy to provide advice and information.
If you need further assistance, please let us know.
Eric
Hi @shawmat
You'll have to speak to your local builder to know if any extra support framing needs to be built to hold the HardieFlex weight. The Adhesive foam roll can be applied to the beams, but if your getting condensation on the ceiling panels You'll probably have to put some of the rubber there as well.
Let me tag @condruss to see if they went ahead with the textured paint. A Gazebo ceiling enclosure is similar to your house's. enclosure. A timber frame is made, insulation is placed, and viola! Your patio now has a proper ceiling. This structure will now protect the area from getting too much condensation.
If you need further assistance, please us know.
Eric
