I need suggestions on how best to flash an exterior wall where Cultured stone meets Hardiplank siding. The wall will have cultured stone covering the lower third of the wall, capped with a wainscot sill(also cultured stone) and Hardiplank Cedermill select siding above (covering the top two thirds of the wall).
Thanks,
Duane
Join some of the most experienced and recognized building professionals for two days of presentations, panel discussions, networking, and more.
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.
Start Free Trial NowGet instant access to the latest developments in green building, research, and reports from the field.
Start Free Trial Now
Replies
Wow! Another Duane..welcome to BT. Hang on it's a long ride.!
About the flashing..I like lead, but anything like brown alum, copper will do..make a bend 90 degrees or less, up behind the siding for 4'' or so, and a leg out onto the stone about an inch and a half..that leg needs a small counter bend to spring tension it tite to the stone...maybe a half inch and 5 degrees from flat..that seam can be siliconed. Obviously lead don't spring so disregard that..lead is pressed tite and caulked..
I hope that ws clear as mud..
Duane
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations.
Thanks Duane!
I have seen flashing done this way...my concern for this project, is that the inch and a half projection onto the stone will become dented easily and look bad over time. I guess if I use lead, it might lay flat (since I can't really add tension to it)...do you think the lead would hold tight to the stone? Would caulking the hardiplank work just as well...if I need to depend on the caulking any way, does the flashing really help?
Duane
Edited 5/24/2004 8:24 pm ET by DEC
I would go with the lead..I have been using a lot lately, and am more and more. Lexel is an adhesive caulk and IMO is better than silicone,..I would not fear a garden below it, nor silicone harming any flashing.
No, I would not depend soley on caulk..the expansion and contraction of different materials benefit from all the help ya can get.
Duane
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations.
So does this mean that your other brother Duane will be along shortly???
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming.... WOW!!! What a Ride!
Flashing is a good idea. Since both Hardie and Cultured Stone are lifetime products, I recommend against aluminum flashing. It reacts with cement (a component of both products) and won't last as long as the siding and stone will. I used copper for my house. The color went with the craftsman style of the house, and lead would have prevented me from planting vegetables in the garden along the foundation.
Avoid silicone caulk with any metal, since its curing gives off acetic acid, which will harm most metals.
I think the correct term for the sill you describe is "water table".