DIY - Tiling over Orby backboard using dowel fixings?

[101_North]

Hi folks,

DIY'er here. I'm doing up our bathroom and have installed Orby boards as per the manufacturer instructions http://www.orbry.com/pdf/orbry-solid-wa ... -guide.pdf

My question is - the mechanical fixings protrude from the boards by about 2mm and my concern is that these will prevent me getting a good contact with the adhesive in places with a 6mm notched trowel that I was recommended for the job. My tiles are 400mm x 200mm and are 7mm thick. I'll be using bagged adhesive and want to get this right first time.

I was wondering if a 10mm notch would be more suitable and give me better adhesive coverage on the back of the tile?

Any advise would be fantastic.

101

[Christian_Booth]

If you have a 6mm notched trowel, and the screws stick out 2mm, I doubt by the time pressure is applied the tiles won't come into contact with the fixings. Just make sure the boards are very secure, no movement.

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[101_North]

Thanks! I got an 8mm just in case I've any issues with the 6. Fingers crossed!!

101