Beau Posted October 8 Share Posted October 8 I have just started the renovation of our old family home. First job is a utility room with a shower. Its some years since I have had a building project and I see XBS backer boards are a popular choice for shower surrounds so that's what I have used (Jackoboard). I have got a Mira Flight tray. I want to be belt and braces on waterproofing so got a shower sealing kit which comprises of a primer, sealing tape and a liquid waterproofer. Jackoboard is supposedly none porous so I haven't used the primer and this was confirmed as the correct option from the technical helpline for the waterproofing. Where the tape seals between the shower tray and the wall the instructional video shows cutting the perforated edge off the tape and then pressing it into a layer of the waterproofing paint. This is where it's gone wrong as it has not bonded to the tray at all and not especially well to the Jackoboard. I really dont want to strip everything off if I dont have to but can you see a way to reseal this edge and what I did wrong? Thanks Beau Link to comment Share on other sites More sharing options...
Beau Posted October 9 Author Share Posted October 9 Think I'm just going to see if I can stick the loose part back with some OB1 and hope for the best I have 2 more bathrooms to do and dont want to get in this mess so how do you like to seal your shower trays/baths back to the wall? Thanks Link to comment Share on other sites More sharing options...
Redbeard Posted October 9 Share Posted October 9 I have never used Jackoboard but I have used 'straight' XPS to tile onto. I just relied on the tiles and silicone sealant and that has worked for over 15 years. It occurs to me that a 'tweak' might have been to rebate the XPS so that the tray sat, say, 10mm underneath, with silicone 'buttering' as a waterproofing aid. Then the 2nd-stage waterproofing would be the tiles/silicone (or big board/silicone as 'usual'. That depends a little on the depth of the shower-tray perimeter. I do not claim to be an expert in tiling. shower-fitting or waterproofing (I hate it!), but what I have done seems to have worked. 1 Link to comment Share on other sites More sharing options...
Beau Posted October 9 Author Share Posted October 9 6 hours ago, Redbeard said: I have never used Jackoboard but I have used 'straight' XPS to tile onto. I just relied on the tiles and silicone sealant and that has worked for over 15 years. It occurs to me that a 'tweak' might have been to rebate the XPS so that the tray sat, say, 10mm underneath, with silicone 'buttering' as a waterproofing aid. Then the 2nd-stage waterproofing would be the tiles/silicone (or big board/silicone as 'usual'. That depends a little on the depth of the shower-tray perimeter. I do not claim to be an expert in tiling. shower-fitting or waterproofing (I hate it!), but what I have done seems to have worked. Yes I may be overly complicating things. In hindsight setting the tray under the Jackboard would probably be a good plan and I may well do that on the next two bathrooms. Only thing I'm no sure on is how much +/-mm there is for shower panels to fit a tray. I dont want them overlapping the edge having set the tray in too far. I will know more once Ive finished this one. Link to comment Share on other sites More sharing options...
Redbeard Posted October 9 Share Posted October 9 I have a feeling it varies from tray to tray. Good luck with the next 2!! 1 Link to comment Share on other sites More sharing options...
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