Painting treated pine (H4 CCA)

[bjd]

Hi,

I have built a structure in my back yard to hold some tubs of plants. First time I have tried any serious carpentry for a long time. (I'd give myself a mark of about 75 out of 100 for the final structure). I made it mainly out of large treated pine sleepers 200 mm x 50 mm which I bought at Bunnings. The sleepers are designated H4 which I think means they use CCA for preservation.

I want to paint the whole structure in a flat white colour. The wood looks really porous. What steps should I take? Any suggestions regarding particular products as part of the guide would also be helpful.

Thanks in advance.

[artme]

G'day bdj and welcome to the shed. Good to have you here!!

I would paint with a good quality acrylic undercoat, possibly 2 coats and then
a good quality acrylic exterior paint, preferably flat or low sheen. Solargauard
would be a very good option.

[GraemeCook]

Good Morning bjd

Welcome to the Forum.

I painted the rails and posts on my treated pine deck with Solarguard about 20 years ago - it needed three coats to get a good even coverage - first coat was real patchy as the paint soaked into the timber - second coat was good - third coat was excellent and worth the effort and cost.

After about 7-10 years the surface starts to go powdery; I just give it a light washdown with the Karcher and apply another coat of Solarguard. So far I have refreshed that painted surface twice, last time was 2-3 years ago, and it still looks good.

Suspect that any good quality water based paint would do the job equally well.



Fair Winds

Graeme

[orraloon]

Solarguard for me too. I did the posts and rails around my deck a tad over 10 years ago and still good. A lot of treated pine can be soaking wet when new so if that was the case then give it a few months to dry out first.
Regards
John

[nrb]

As long as it's dried out you should be good.
If you thin the first coat,10-15% that helps to penatrate a bit better.

[bjd]

OK, thanks for the replies. Seems that Solarguard is the unanimous choice for the final two coats and I have a choice of either Solarguard or a specialised undercoat initially.

I'll probably leave it till March to paint, so that should remove any residual moisture.

Thank you all.

[Bob38S]

Check out the products from the FLOOD company. Penetrol for oil paints and Flotrol for water based. Good stuff, the paint goes further, adheres better and seems to last longer.

No no affiliation just a user.