Sydney and Huggy Posted May 27, 2015 Share Posted May 27, 2015 The joint between the stone wall of the barn and the tiles on the new(ish) lean-to covered patio has zinc flashing and our builder had to replace the fillet of mortar that covers the joint between the tiles and the flashing after about a year. [:(] This has now also cracked and split, starting to break up along the length of it. Easier to try and fix it ourselves. Wondering if anyone has any suggestions as to what might be best to use to make it a bit more durable - lime based? cement based?[8-)] Link to comment Share on other sites More sharing options...
grumpyaudeman Posted May 27, 2015 Share Posted May 27, 2015 Hi Which bit or what's moving Link to comment Share on other sites More sharing options...
Sydney and Huggy Posted May 28, 2015 Author Share Posted May 28, 2015 Everything is solid, nothing moving at all. It's what I would roughly describe as haunching (as you would set in a chimney pot) along the length of the roof tiles. Don't know if the twice it's been done when it's been too warm and dried out too quickly or the mix has been wrong but it needs doing again and just looking for a point in the right direction as to what best to use. Link to comment Share on other sites More sharing options...
ventodue Posted May 31, 2015 Share Posted May 31, 2015 [quote user="Sydney and Huggy"]Everything is solid, nothing moving at all. <snip> [/quote]Well, SOMETHING is - it's the reason the flaunching is failing [:)]. (And is also why Steve, aka grumpyaudeman, posed the question ... )Basically, you've got movement due to the different expansion rates of the stone wall and the lean-to roof. To deal with the problem, you need to either:1. Use a flexible flashing band to cover the joint between the roof and the wall. This kinda stuff:http://www.amazon.co.uk/225mm-FlashBand-Flashing-Roofing-Flash/dp/B004LKDVDSThis solution is cheap, but not pretty [:(].2. (If you can) Install a stepped flashing into the joints of the stone wall to cover the existing zinc soakers (note the correct roofing terminology btw). Put 'Stepped flashing' into Google images to get an idea of what I'm talking about.This is the 'proper' way to do things; but it's more expensive, and is a right PITA (if not impossible) to do in a random-coursed wall. But even that can be done ...http://www.fickbros.com/wp-content/uploads/2014/09/2014-08-06-Dan-16.jpgHTHCraig Link to comment Share on other sites More sharing options...
Sydney and Huggy Posted May 31, 2015 Author Share Posted May 31, 2015 Hmmm, looks like it's going to have to be flash banding, I can live with the look.Many thanks for the help and suggestions.[:)] Link to comment Share on other sites More sharing options...
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