Painting External Timber Windows and doors

[Abyone]

My Timber windows and external doors are showing signs of wear especially at the back of my house where they are south facing.
They are installed about 20 years without maintenance so far from what i can tell. They appear to have a factory varnish finish - wood is vsible so they arent currently painted.

I am planning to paint them becasue to oil them would involve acomplete sanding back to bare wood.

Was initially thinking oil based but it seems water based is a viable option these days so to make the job easier i am now leaning towards water based.

I have narrowed my choice to Zinnser 123 and Allcoat or Tikkurila Ultra Primer and Ultra Classic.
Zinsser seems to get a lot of positive reviews so leaning in the Zinsser direction but welcome thoughts or advice from anyone familiar with either brands or other recomendations if my approach seems flawed.

 

[opps]

As a professional decorator I prefer oil based finishes. However, on my current job, the customer specified the waterbased version of Zinsser One Coat satin. I am not painting the siding sashes, just the boxes.

The house was recently repointed so the boxes had been subjected to a lot of red brick dust.

The One Coat has pretty poor colour obliteration. I used oil based Dulux Trade Weathershield undercoat to turn the timber back to white first.

The One Coat lays off "ok". The job is being done on a very strict budget. The tramlines (brush marks) offend me but it is what the customer wanted.

I have never used Tikkurila.

 

[Abyone]

Thanks, which oil based primer and top coat would you use yourself ?

 

[opps]

I tend to stick with the Dulux Trade Weathershield system because I know how they/it perform/s.

In the event that a customer wants a satin oil based finish, I got for the Johnstones exterior oil based satin (when I can specify them). There isn't a DTW oil based satin though. It is only available in the waterbased version.

There are other decorators here whom have moved over to waterbased only. I find that they do not flow anywhere near as well as oil based paints.

As an aside, I spent many years painting MDF cabinets (by hand). I have honestly never seen a water based hand applied finish which was superior to my finish (and that includes the few waterbased finishes that I applied).

 

[Scally-Ho]

What about giving some thought to specialist paint coatings such as used on farm buildings and equipment. I used a HD product around 12yrs back on my workshop and its still good and weather proof.

Paintmaster Ölbasierter Oxidglanz-Hochleistungsmaschinenlack – 20 Liter

Ein langlebiger, halbglänzender Glanz-Maschinenemail mit einer rosthemmenden Formel, die das Risiko von Korrosion verhindert. Hohe Haltbarkeit und einfache Reinigung.

premiumpaints.co.uk

 

[opps]

What about giving some thought to specialist paint coatings such as used on farm buildings and equipment. I used a HD product around 12yrs back on my workshop and its still good and weather proof.

Paintmaster Ölbasierter Oxidglanz-Hochleistungsmaschinenlack – 20 Liter

Ein langlebiger, halbglänzender Glanz-Maschinenemail mit einer rosthemmenden Formel, die das Risiko von Korrosion verhindert. Hohe Haltbarkeit und einfache Reinigung.

premiumpaints.co.uk

That might well be a decent product. Difficult to tell given that the site is registered in the UK and the product details are in German- not quite legal...

 

[Scally-Ho]

If you want good protection, then IMO buy German via an established importer.

 

[Abyone]

What about sikkens rubbol satura ?
Would that be an oil based option - would I have to sand back completely or just key - try to avoid a complete sand back to bare wood.

 

[opps]

What about sikkens rubbol satura ?
Would that be an oil based option - would I have to sand back completely or just key - try to avoid a complete sand back to bare wood.

Never used it.

It seems to be waterbased and they recommend keying existing finishes first and then using their primer.

https://www.woodcaredirect.co.uk/pdfs/rubbolblsatura.pdf

 

[opps]

If you want good protection, then IMO buy German via an established importer.

I am not doubting the quality of the product.

I have only just noticed that your hyperlink went to the German translation of the site. Dunno why.

As an aside, the paint in question is made in Derbyshire, England.

They do seem to have a decent range of specialist products though, tnx for the recommendation.