I didn't know that you had to prime hardboard before papering so was very disappointed to find paper hanging down from the ceiling that I had lined the previous day. So I stripped it and washed it a painted it with acrylic primer and papered it again but the same thing has happened. Any ideas? Can you hang paper with PVA instead of paste?
Brendan.
PVA would be worse, it lacks grab. I'd suspect the paste, faulty or too dilute perhaps.
NT
You can. but I don't understand why this is happening
Probably because neither the hardboard nor the primed hardboard were sufficiently porous to absorb the water out of the paste
Try much thicker paste..
The problem is that nothingmuch sticks to hardboard. I think there used to be some glue that did this kind of thing way back as we have some pieces of hardboard wedged in to make a curved ceiling at the eaves simply tapered, and its got paper stuck on it very well. Brian
Mmm. It was a watery mix. Maybe I'll give it a coat of emulsion first then try again with thick paste. But I'll do it first with a sample piece.
It needs a coat of size. Or PVA to seal the surface. Keep applying coats until it has a shiny finish.
The problem isn't too much suction it is not enough suction. I want the opposite of size or PVA.
There used to be 2 types of hardboard; Normal and Oil-Tempered. I wonder if the Oil has some effect on adhesion.
No, the paste is failing because the water is being sucked out of it.
New plaster has to be sized before wall paper can be pasted to it.
The water leaving is normal drying process, I'm not seeing how that can be the problem.
NT
The paste is sucked out of the paper which then falls off.
Read this. #
Any porous surface needs to be rendered impervious to prevent this. You can use "size", PVA or keep applying coats of paste (letting dry between) until you get a shiny surface.
That would be my guess. An oily surface is basically hydrophobic, it won't want to bond to the polar ends of PVA or cellulose paste.
An interesting idea, but since I had no trouble papering onto an untreated very absorbent surface last time I doubt it.
NT
If that's the problem a good solution may be to coat it with oil based undercoat, brushing it well. It's compatible with small amounts of oil & provides a water stickable surface.
NT
It's factual information. If you're too thick to understand it, tough shit. My father was a painter & decorator BTW.
My last wallpapering job proves it's not. I see you missed that. Bye.
Harry
Please don't spoil my thread.
Thank you.
Update: I tried it on a small piece of hardboard. First acrylic primer, then emulsion then I papered it with a stiff paste and it stuck, though not convincingly, it peeled off without any threat of tearing but it was good enough. So I papered the ceiling for the third time and AAAAAARGH! it's all hanging down again. Soon it's going to be me hanging from that ceiling.
Just work out a way for that to be the intended effect. Call it Mountaintex or something.
NT
I've stuck all of the loose paper up with PVA, no problem, I should have done it long ago.
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