PaMty tent knotting?

[Jonzjob]

I have a friend who has a problem with resin coming out of a couple of beams on his terrace. The beams are not new, about 30 years old, and were fitted when the house wa built.

My question is, would it be possible to put some patent knotting on it to stop it and if so can he apply some over the paint and then repaint it or will it have to be stripped back to the bare wood??

At the moment it occasionally drips on to the tiled floor and makes a hell of a mess!

 

[Roughcut]

Zinsser Bin might be another option and might be easier to overpaint as it's white.
I've found with knotting solution (which in my experience is brown) that it shows through and can take a good few coats to overpaint sufficiently to achieve a good surface finish.

 

[Phil Pascoe]

Aluminium primer will cover all sorts - but whether it (or anything) will stop a positive bleed through, I don't know.

 

[Jonzjob]

That looks good stuff RC. The biggest problem with it is he will only need an eggcup full. The several coats to cover wouldn't be a problem with it being such a small area me-thinks? I can supply him with an eggcup of at knotting, I can even turn the eggcup if needed 8) 8)

Not the easiest thing to explain. He is French and doesn't speak any English. My French ain't bad, but it should be fun :mrgreen: :mrgreen:

I doub't that alu primer would stop this Phil, but it's always there to try and I have some of that too.

Ta for the ideas gents.

 

[Eric The Viking]

I bought some knotting in a rush at the local ironmongers here in a really small bottle - wasn't expensive.

The trouble with pine resin is that it's oozig because it's a liquid, and you can't easily paint onto liquids! I know knotting helps, but it's more useful for stopping knots shrinking and falling out of boards, and giving a stable surface for painting, than fixing the resin problem.

Assuming the problem is bad enough to need repainting around the troublesome area, a couple of thoughts:

1. The beam doesn't have an inexhaustible supply of resin, as the tree is dead! Once you've dealt with it the problem shouldn't keep coming back.

2. You could cut out the offending bit and plug it (let in a sliver of timber), assuming that sort of repair won't affect the structural strength.

3. Try focused heat on it: pine resin oozes much more easily in hot weather. Something like a hot air gun. Mop it up when it oozes and eventually it has to stop (see 1. above).

4. Ethanol (denatured form is meths here and poisonous) or acetone will thin/dissolve it (from memory acetone is best). Again, if you clean up the source, knotting + filler will then work well and the job's done. Don't suggest combining this with the hot air gun though!

I agree that if it's under paint, it's a real pain to sort out. I've had it a lot in window joinery (resin seems to burst out from behind gloss paint at the first hint of summer sunshine), andf the only real solution is to strip back to the wood, clean up thoroughly and repaint.

Sorting out pockets of resin is a job I really hate, second only to stripping lead paint.

E.

 

[Phil Pascoe]

I though Eric's third point worth a try. I went out with a girl who lived in a house on an estate where the decorators had pulled a fast one (I knew the brother of a decorator) and emulsioned the woodwork instead of priming and undercoating before glossing. The joinery was decidedly second rate and at the height of summer you could watch the resin running. An old guy I worked with told me that when he was young, architects used to specify on high class jobs if they wanted white windows that the decorators were to use pink primer, off white undercoat then white undercoat then gloss so it could easily be checked. Sorry to go off tack.

 

[Jonzjob]

I would have to have a look to see if the beam is load bearing at those points Eric, but it may well be the best idea to drill out and plug the leaks. I have Forstner bits up to 2 1/2" diametre and I can soon turn plugs to fit any holes.

As for running out of the stuff it seems to be inexaustable for the last god knows how many yeears? And as for hot summers? We regularly get mid/high 30s here, so no shortage of the warm thingy in the sky. Heat index of 8 or 9 quite frequently.

We have over 100 resinous trees in the garden. The majority are leylandii and from pruning those I can agree that acitone is great at removing resin from hands/cloths/tiles/tools and anything else it gets on.

I'll see about getting a look at it and see what I can do? Ta again folks!!

Edit : - Sometimes I wonder why I have difficulty is spelling in French? If I could spell in English it would help. In the 1st line I have changed bean to beam :shock: :shock: