Thistlebond

niallmegs

Hi

I'm in the middle of renovating a house and i'm nearly ready for plastering. Its and old house and some of the walls are quite bad. My plasterer recommended i board over the walls first with half inch boards but a friend told me to look at using "thistlebond.it"

My plasterer has never heard of it but he heard of an other plasterer that used it but said the walls cracked after a while and he had to go back to the job. I'm just looking for feedback.

Has anyone used it?

Thanks

budhabob

What do you mean by bad? Patchy/scarred etc, or very bumpy? Whats the original construction?

niallmegs

budhabob wrote: »

What do you mean by bad? Patchy/scarred etc, or very bumpy? Whats the original construction?

The walls are fairly straight but there are layers of paint and paint flakes on most of it with some scratches. The parts with plaster missing we'll fill with bonding first. Our plasterer said that we might be able to see the uneven patches after painting if we only skim the walls. That's why he suggested reboarding.

Just wondering would thistlebond be an alternative before skimming?

budhabob

niallmegs wrote: »

The walls are fairly straight but there are layers of paint and paint flakes on most of it with some scratches. The parts with plaster missing we'll fill with bonding first. Our plasterer said that we might be able to see the uneven patches after painting if we only skim the walls. That's why he suggested reboarding.

Just wondering would thistlebond be an alternative before skimming?

Thistlebond is basically a bonding agent, like polybond. Its designed to give the new layer of plaster a better bond to the existing surface. From what you describe I would have thought a bonding agent and skimcoat would suffice. The addition of new boards seems excessive in my book.

We are mid renovating too, and stripped EVERY room of wallpaper. Alot of the walls were scarred, but as the house was 70 years old we kind of liked that appearance i.e. the house has lived. In the future we may go back and skimcoat it all.

Right2Write

We had uneven interior walls in an old part of house. When renovating, I boarded them with I think 3/8" plasterboard, fixed with bonding plaster, to give a more continuous level surface. Then skimmed these.

No insulation in these walls, stone and wide. Plasterboard adds a little thermal mass too and is warmer to touch in my mind anyway than original sand/ cement render used. But works well enough as long as building is lived in and heated.

TheLastMohican

Right2Write wrote: »

We had uneven interior walls in an old part of house. When renovating, I boarded them with I think 3/8" plasterboard, fixed with bonding plaster, to give a more continuous level surface. Then skimmed these.

No insulation in these walls, stone and wide. Plasterboard adds a little thermal mass too and is warmer to touch in my mind anyway than original sand/ cement render used. But works well enough as long as building is lived in and heated.

If you thistlebond it and skim you will have cracking problems down the road. Hairline cracks might settle but any movement in the walls will present a new spiderweb. An earlier answer is the way to go. Reslab, mesh, bond out any bad hollows and skim.
The finish is only as strong as the background.
Best of luck.