Putty and paint advice for sash windows

[markturner]

I know several threads exist on here and have looked at most. I have a specific query regarding the sashes I am currently making and installing. They were glazed using trad putty 2 weeks ago, stored in the house & workshop for painting. I am told by the glazer we can paint after 2 weeks, but the putty is still pretty soft and you have to be very careful not to deform it when brushing....its not dragging though.

I am under a fair bit of pressure from teh client to install the sashes ( frames already fitted and windows blocked off with OSB) but we wanted to hold off and paint the sashes on the bench before fitting as its easier to get a better job that way and we dont have to battle the weather.

If we do end up having to install the sashes with the putty ( we have painted the wood) unpainted, will this cause any issues to teh putty's drying process or give problems down the line? Thinking maybe fit the sashes and pop them out again when teh putty is drier....?

Using ( at clients insistence) Farrow and ball water based exterior paint.

Thanks

 

[Windows]

Linseed putty hardens with oxygen so increasing air flow around the putty might increase the hardening rate somewhat.

 

[Doug71]

As said air flow will help, a fan blowing over them should speed things up.

Water based paint and linseed oil putty don't always play well together.........

 

[Fitzroy]

I painted some trad putty almost immediately in the summer and it was too early so the paint cracked and flaked off, however a few months later a light sand and touchup on the putty and it all was good. Offer fair warning to the client that you can install sooner with the risk of some future touch-ups.

 

[scholar]

I know several threads exist on here and have looked at most. I have a specific query regarding the sashes I am currently making and installing. They were glazed using trad putty 2 weeks ago, stored in the house & workshop for painting. I am told by the glazer we can paint after 2 weeks, but the putty is still pretty soft and you have to be very careful not to deform it when brushing....its not dragging though.

I am under a fair bit of pressure from teh client to install the sashes ( frames already fitted and windows blocked off with OSB) but we wanted to hold off and paint the sashes on the bench before fitting as its easier to get a better job that way and we dont have to battle the weather.

If we do end up having to install the sashes with the putty ( we have painted the wood) unpainted, will this cause any issues to teh putty's drying process or give problems down the line? Thinking maybe fit the sashes and pop them out again when teh putty is drier....?

Using ( at clients insistence) Farrow and ball water based exterior paint.

Thanks

Only to add that I have used water based F&B exterior eggshell very successfully with trad putty, but yes, I did have the luxury of leaving the putty to cure. I resolved to not use trad putty on my future projects for this reason.

Cheers

 

[Ollie78]

Pull out the putty and replace with a hybrid polymer, paintable next day.

Did you dust the putty properly with whiting or plaster ? Sounds like the putty may have been too oily to begin with.
I suspect you might need a really good adhesion primer under the farrow and balls waterbased, I recommend Tikurilla Otex or maybe Zinsser.

I never use putty anymore, its only advantage is price.

 

[markturner]

Pull out the putty and replace with a hybrid polymer, paintable next day.

Did you dust the putty properly with whiting or plaster ? Sounds like the putty may have been too oily to begin with.
I suspect you might need a really good adhesion primer under the farrow and balls waterbased, I recommend Tikurilla Otex or maybe Zinsser.

I never use putty anymore, its only advantage is price.

Thanks , can I paint the F&B system over the Otex without issues? I did dust with whiting, yes

 

[markturner]

Hi, coming back to this because the putty is still as soft as when we had it done, despite 3 weeks of drying. We have started painting using the Tikurilla Otex water based primer. We tried both types, the oil based was too thick and difficult to apply on the soft putty without marking it.

Applied a first coat of the Farrow and ball topcoat and today on inspection, we see the result as in the enclosed picture. Any idea whats going on?

Need some advice as to how to proceed, the sashes MUST be installed, due to client pressure, I cant leave them without windows any longer.

If I do this, should I cover the putty with the Otec primer and leave outside to cure? Will this cause any issues to either the paint or putty later?

 

[Jacob]

I know several threads exist on here and have looked at most. I have a specific query regarding the sashes I am currently making and installing. They were glazed using trad putty 2 weeks ago, stored in the house & workshop for painting. I am told by the glazer we can paint after 2 weeks, but the putty is still pretty soft and you have to be very careful not to deform it when brushing....its not dragging though.

I am under a fair bit of pressure from teh client to install the sashes ( frames already fitted and windows blocked off with OSB) but we wanted to hold off and paint the sashes on the bench before fitting as its easier to get a better job that way and we dont have to battle the weather.

If we do end up having to install the sashes with the putty ( we have painted the wood) unpainted, will this cause any issues to teh putty's drying process or give problems down the line? Thinking maybe fit the sashes and pop them out again when teh putty is drier....?

Using ( at clients insistence) Farrow and ball water based exterior paint.

Thanks

Water based paint incompatible with putty. Must be oil paint.
This time of year putty outside isn't going to dry off enough to paint for some time. It only needs to be touch dry, not set hard. Best done in the workshop at least as far as primer and then finished in the spring.

 

[markturner]

Hi Jacob, OK...so if we have already tried some with the water based, how do we best deal with that? Hopefully not too late for the rest, but surprised no one has pointed this basic fact out before!

And will it be OK unpainted outside? I was worried primarily about water ingress between teh putty and glass.....

 

[Jacob]

Hi Jacob, OK...so if we have already tried some with the water based, how do we best deal with that?

Dunno! Paint over it with oil paint I guess.

Hopefully not too late for the rest, but surprised no one has pointed this basic fact out before!

Perhaps more basic opinion than fact - but you can paint just touch-dry putty with linseed oil paint. I guess other oil paints ditto.

And will it be OK unpainted outside? I was worried primarily about water ingress between teh putty and glass.....

Seems to last 6 months or so pretty well. Might need a bit of making good if left too long. Hot sun dried it out a bit fast, if not already painted.