Joined: Sep. 2015
||Posted: 10 Jan. 2019,16:17
|Quote (Tony McC @ 22 Oct. 2018,10:40)|
|Dansand... should be re-named Don'tsand. It works for a few weeks/months and then turns into.....err....sand and comes out with surface scour and/or a power washer.|
Regarding the other products, you need to understand the difference between 1-part and 2-part resin mortars. Jointex is a 1-part, and although it's a better-than-average 1-part, it's still not anywhere nears as tough or weed-resistant or power-washer-resistant as a good 2-part, such as Romex D1 (Romex do a 1-part by the name of 'Easy', just to confuse you).
A few years ago, 1-part products were seemingly miraculous and we all loved them, myself included, but the advances made with 2-part mortars means that I, at least, am now in a position where I only recommend 2-part products. They cost a few quid more, but, boy! Do you get value for money from that few extra quid! They are so bloody tough and resilient.
That's not to say there isn't a place for 1-part resin mortars. For low traffic, pedestrian areas, subject only to non-aggressive cleaning (nowt stronger than swilling down with soapy water and stiff brush) they represent an acceptable and lower-cost alternative.
Your project prsents two problems, though: Exceptionally narrow joints and then exceptionally wide joints. Straightaway, the 1-part products are highly unlikely to be suitable for wide joints (100mm or so) becuase they remain soft-ish and pliable even when cured, so they'll fail in time. And, apart from a couple of products I've seen in Germany, the 1-part products need a minimum 5mm joint width to stand any chance of surviving. There *are* 2-part narrow-joint resin mortars, which would work at 2mm joint width, but if you use these to fill 100mm wide gaps, it will be scarily expensive.
So: a compromise. I'd strongly suggest filling any joints in excess of, say, 25-30mm, with either a strong-ish (4:1) sand/cement mortar, or a grano mortar to keep costs realistic, and then a narrow joint 2-part resin mortar such as, say, VDW 815, for the <25mm joints. If you use a buff coloured resin mortar and silver sand for the sand/cement mortar, you'll get not-too-bad a colour match.....sort of. One that doesn't obviously clash, anyway!
British made EASYJoint (1 part) can go down to 3mm widths, not that minimum width requirements will have any bearing on such a wide jointing job
Good luck with the job, we hope it goes well!