Woody2Shoes":3tr89hy5 said:
PVA glue has a surprisingly short shelf-life and can quickly become useless if ever exposed to frost.
What make of PVA did you use, is it 'in date' (most of the good makes have a DoM printed on them), and have you been keeping it in a heated environment?
Like other posters, your photo suggests to me that there was a gap when the glue dried in the joint - which would definitely have weakened it a fair bit - but I'm wondering if the glue residue is strong or weak (it looks a bit flaky/chalky to my eye and makes me wonder what condition the glue was in), how tough is the glue residue (it should be resistant to a fingernail)?
Cheers, W2S
I used a cheap weatherproof PVA from Toolstation, which I had bought sometime last year when I didn't know about anything in woodworking. The glue residue was a bit flaky when I tried to clean up with a plane.
MattyT":3tr89hy5 said:
I'm intrigued to see if more clamping pressure helps with your next attempt. Keep us informed.
Here is the update:
I set about "squaring and truing" the two edges to eliminate bad practice on my part.
And I used the same glue again.
This time, it took me a good 40 mins PER EDGE, trying to square it with a plane (stanley No.4) - It didn't help!!
I was so focused on getting the edge perpendicular to either sides and flat that I forgot I was planing the pieces into a trapezium from the lovely rectangle it was
- it just screams NOOB here.
After that I decided to get the big gun out and decided to plane it using the electric planer I had lying around in my in-law's garage, No joy there either - still kept planing it like a router with a roundover bit!
Then used the other side of it as a reference and cut out a straight edge on my table saw (Remember my other post where I had issues with my table saw setup - I found out what it was. The supplied blade insert is cast aluminium and it is distorted like melted plastic. My TS blade is actually perpendicular to the cast table, but the insert, despite the adjustment screws in it, kicks the work piece up to give me a tapered cut of about 85 degrees. )
Anyway, after a bit of "cut the same edge from top and bottom face" method, I got an edge which was square and didn't let any light through.
Used the same PVA, rubbed the two pieces in with the glue, this time clamped with one of my large cast iron clamps (as my other clamps weren't wide enough), set it aside for 4 - 5 hours. No gap on it, I planed the joined area to see no clear line of joint. The two pieces have bowed ever so slightly, but the joint is ridiculously strong - proving that it was indeed what you guys called it - bad prep!
Although this must be a good laugh for everyone here, including myself, I was pleased that I finally got a joint as I've seen on tons of YT videos - even if it took me better part of 3 hours to do it
P.S - In photography, people often talk about photographers who have all the expensive gear imaginable but still can't take a good photo. **Ahem Ahem**, yours truly!