The Framers Forum

Hi
I recently built some deep box frames, I noticed that on one of the fillets after transporting had detached from the inside of the frame, I had to disassemble and redo. I am a little worried that this may happen whilst in the customer possession. I had attached them with double sided tape, I used "sellotape" assuming it was similar to ATG and was a reputable brand. I used a 2' length strip of double sided at the ends and in the middle of the fillets, the longest length of fillet was 90cm.

Did I use the wrong bonding material? if so what should I use?
Did I use a suitable material but just didnt use enough?

I think when the frame flexes ever so slightly it places significant shear forces on the tape causing the tape to become detached.

Thanks in advance

LAwrie

Depends a bit what is behind the fillet. DS tape should work OK, but that term covers a lot of ground. In theory, as the fillet is mitred and braced against the frame lip it should stay in place even without sticking. The tape is more to make assembly easier. If you really want sticks-like-youknowwot tape, use HD carpet tape.

If I am doing fillets on a frame that doesn't have glass behind then I use a thin piece of timber fixed into the rebate to lock it in place. This method has the additional benefit of extending the rebate depth if needs be.

You don't mean a rebate spacer do you? If so use glue, with just a few dabs of DS tape to hold while the glue dries.

Apologies Prospero for my poor description, as Roboframer guessed I meant rebate spacers....

What sort of glue should I use? I want to keep the frame servicable in case of glass breakage. The thing that comes to mind is that white rubbery glue that stunk in a sort of pleasant way that I used to use at school, when it dried you could peel it and roll it...

I have used double sided VHB foam tape in the past for non PF projects, incredible stuff but it is probably too strong for this sort of thing..

I use foam board spacers for most things so I don't worry about wrecking them if they need removing. If you're using wooden ones then anything that would give before the wood would (!) PVA would be fine, just in beads, not slapped all over the whole surface.

Roboframer, do you make rebate spacers for box frames out of foamboard? I have been buying white fillets for £1.5 / metre or so...

For all but the largest frames I use 5mm foam board in black & white or 3mm foam board plus mountboard if colour is important. A great way of using up offcuts.