Just undercoated a new pine door and the wood has bubbled. Does anyone know why?
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Sounds like you painted it when the wood was not dried out properly or on a damp day..
Do you mean the paint has bubbled?
If so its because the door has been treated and needs to be rubbed down to provide a key for the undercoat.
Sounds like the door was not fully seasoned and that the pine resin is still in the wood thus causing the bubbling paint work.
Speak to the plave where you bought the door from.
It just occurred to my that maybe the door had been treated did you check this out?
what was it undercoated with? and what finish or kind of paint are you after?
The "wood" bubbled ? Was the undercoat water based ? is it a hollow core door ? Did you put the undercoat on outside and leave it to dry in the sun ?
you say the door was new !
so you should have primed the door first ,then sanded it down
before putting the finishing touch on it ,
which you still can do now ,first use a heavier grit sand paper first then go to finer grit paper and clean all dust off then reapply the finish
the reason for this is that the resin in the pine has caused the paint not to take , the correct procedure would have been to treat all the knots in the pine with either shellac or a proprietary knotting solution , this seals the resin into the timber and you can then paint it , only solution I can suggest is to either rub down the door and start again , or it may be easier to buy another door
Firstly, did you paint all the knots with a primer before painting them... I believe this is the most likely cause as it happened to me with my new banister, i sanded it down again applied primer to knots before glossing and its now perfect...
The wood certainly shouldn't bubble. If the wood bubbled, it's not wood. Maybe masonite.
It sounds to me like the wood in your door either has too high of a moisture content or the door has something on it that is causing the paint to bubble.
Let the paint you put on the door dry completely. Then lightly sand the bubbles away. You should sand the whole door to a smooth finish. Then seal the door with white shellac. It seals much better than stuff like Kilz. After the shellac drys ( it drys very quickly) Paint as usual.
You can paint over white shellac with any kind of paint.
You used a WATER based undercoat instead of an oil based one, however the war is not lost. Rub-down with abrasive paper, and use an oil-based type, and best outdoor gloss paint.
EVERYONE here is talking cobblers except ZERD 2000
try painting with aluminium under coat this seals the timber and it will take any paint over it
prime first than paint.
did you ever used a primer to the door,paint your doors with the same color primer and final coatings for the door finish
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