3 way mitre with quad trim?

[perky416]

Hi guys,

Im trying to do a 3 way mitre with quad trim (already tiled using this so i cant change it) at some external corners in the kitchen, however i just cant get all the joints to match. Its not that they are a few mm out, the one side is always way out.

Ive watched videos on youtube, ive read instructions here, i just cant get it.

Please take a look at the images attached.

Step 1, im cutting 2 sections of trim left to right, at 45 degrees, with the trim lying flat, just as per the first image. Im cutting the 3rd piece at 45 degrees in the opposite direction (at the other end of the trim to what is pictured).

Step 2, im standing the trim up as per picture 2 and cutting at 45 degrees in the opposite direction to make a point on all 3 trims. Ive 3d printed a spacer to make sure the cut is dead centre of the trim.

Ive even 3d printed new inserts for the quansol mitre block so there isnt any play in the saw angle.

When i try to put the 3 pieces together, picture 3 is what im left with. I tried cutting the upright trim the opposite way too, so it would stick to the face perpendicular to where it is in the picture, however the mis matched side just moves to the right.

I cant for the life of me get it.

Does anybody know where im going wrong? Im going in for surgery next weekend and really need to get this done. Please help!

 

[johnny2007]

You simply cut the first 2 trims at 45⁰, then the 3rd trim straight to butt up to the back of the first 2.
Gently file any sharp bit when everything is dry and solid.
What you're trying to do is complicated and unnecessary.

 

[Wayners]

As above. That's what I thought. Cut one straight.

 

[perky416]

oh yeah, i see, thanks guys, dropping the kids to school ill try it when i get back

 

[perky416]

Ive just thought, if i cut the two at 45 degrees, am i not going to get a straight sharp lip where they join, that wont match the curved profile of the one butting up to them?

 

[simplesteve]

“You simply cut the first 2 trims at 45⁰, then the 3rd trim straight to butt up to the back of the first.” - But that’s a two way mitre with a butt 3rd leg - it’s not what the O.P. asked for or is trying to do !

A proper 3 way mitre does look good, but it does do your head in doing them ! Lol
It’s complicated trying to explain it here, but watch your videos again and keep trying - the secret lies in when you “lie it down” and cut from the back first, instead of the front…..

 

[johnny2007]

A proper 3 way mitre does look good, but it does do your head in doing them ! Lol

Sure, but once fitted the 2 options soon seem the same to everyone's eyes, apart from the maker's.

 

[simplesteve]

I agree with you 100% Johnny.
But the O.P. has still to scratch that itch !
( you and I have already done it and decided it’s just not worth it ! ) lol

 

[johnny2007]

I agree with you 100% Johnny.
But the O.P. has still to scratch that itch !
( you and I have already done it and decided it’s just not worth it ! ) lol

LOL.
I remember buying metal flexible sealant and a silver Sharpie to get that damn mitred corners perfect.
Nobody ever noticed...

 

[simplesteve]

That Sharpie will go beside the white one and the black one in your toolbox ?
The white for touching up chips in ceramic tiles, and the black inevitably for porcelains! Lol

 

[perky416]

So i tried cutting 2 at 45 degrees and butting the back one up against, this is what it came out with...

Obviously ignore the gap at the front if just thrown it together quickly, i mean how the corner match the profile of the quad behind it. Is this what you guys meant?

 

[perky416]

“You simply cut the first 2 trims at 45⁰, then the 3rd trim straight to butt up to the back of the first.” - But that’s a two way mitre with a butt 3rd leg - it’s not what the O.P. asked for or is trying to do !

A proper 3 way mitre does look good, but it does do your head in doing them ! Lol
It’s complicated trying to explain it here, but watch your videos again and keep trying - the secret lies in when you “lie it down” and cut from the back first, instead of the front…..

What do you mean cut from the back first?

 

[simplesteve]

Doing the second cut on each length ( the arrowhead) I lie the trim on its back, and cut from the inside out. ( after I’ve cut off a bit of the ‘fin’)

 

[simplesteve]

Also, a ‘Genesis’ tile trim mitre block is an essential piece of kit

 

[simplesteve]

Or make it easy for yourself and use a modern flat trim ! Lol
( it’s been years since I’ve installed quadrant on a job )