Now it's time to fix the porch!
Conditions: joists 45x195 pressure-treated NTR AB and decking 28x120 pressure-treated NTR AB. Joists should be attached to the beam with joist hangers. When I bought joist hangers, lag screws, etc. at Hornbach, I also bought anchor screws 5.0x40. These are only electro-galvanized, which doesn't seem suitable for outdoor use and definitely not in pressure-treated wood. Have I misunderstood something, or are my concerns valid?
My options are as follows: I use the purchased anchor screws and try to look happy. You can't see when the stuff rusts anyway.
Or I search extensively for anchor screws with better corrosion protection. Or I use another screw I found on the shelf at home, namely ESSVE Cutters 5.0x40 countersunk head + CorrSeal (www.essve.com). I think I want screws that don't rust and dimensions and head type that work for 45 mm thick joist + joist hangers. The special head of anchor screws is tempting in this context. Are countersunk heads completely wrong with construction fittings? Will the CorrSeal coating wear off against the steel edges and not do its job? Why aren't there hot-dip galvanized anchor screws?
Almighty forum, what do you say?
Conditions: joists 45x195 pressure-treated NTR AB and decking 28x120 pressure-treated NTR AB. Joists should be attached to the beam with joist hangers. When I bought joist hangers, lag screws, etc. at Hornbach, I also bought anchor screws 5.0x40. These are only electro-galvanized, which doesn't seem suitable for outdoor use and definitely not in pressure-treated wood. Have I misunderstood something, or are my concerns valid?
My options are as follows: I use the purchased anchor screws and try to look happy. You can't see when the stuff rusts anyway.
Or I search extensively for anchor screws with better corrosion protection. Or I use another screw I found on the shelf at home, namely ESSVE Cutters 5.0x40 countersunk head + CorrSeal (www.essve.com). I think I want screws that don't rust and dimensions and head type that work for 45 mm thick joist + joist hangers. The special head of anchor screws is tempting in this context. Are countersunk heads completely wrong with construction fittings? Will the CorrSeal coating wear off against the steel edges and not do its job? Why aren't there hot-dip galvanized anchor screws?Almighty forum, what do you say?
How does the stainless steel fare against the hot-dip galvanized building brackets then?
http://www.byggahus.se/forum/verkty...skruv-galvade-beslag-tryckt-virke-funkar.html
post #32
I happened to use regular electro-galvanized anchor screws in pressure-treated wood that forms the outer frame of the shed's floor structure before I knew that pressure-treated wood + electro-galvanized = NO NO ...
They are indeed on the inside and thus protected from really nasty weather, but I hammered in some hot-dip galvanized 5" nails from the outside later, just to be safe, whatever good it does straight into the end grain.
So I'm eagerly waiting to see the shed collapse over the next few years.
I have no idea how "dangerous" this is, or if it's mostly a sales gimmick for expensive coated screws...
Like Gunnebo impreg, a special model for treated wood.
http://www.gunnebofastening.se/segbo/notesamp/internet/segbo00008.nsf/viewunid/E2CFEB7F724DBB21C12574030033CCA2/$file/IMPREG_4sid_produktblad.pdf
http://www.byggahus.se/forum/verkty...skruv-galvade-beslag-tryckt-virke-funkar.html
post #32
I happened to use regular electro-galvanized anchor screws in pressure-treated wood that forms the outer frame of the shed's floor structure before I knew that pressure-treated wood + electro-galvanized = NO NO ...
They are indeed on the inside and thus protected from really nasty weather, but I hammered in some hot-dip galvanized 5" nails from the outside later, just to be safe, whatever good it does straight into the end grain.
So I'm eagerly waiting to see the shed collapse over the next few years.
I have no idea how "dangerous" this is, or if it's mostly a sales gimmick for expensive coated screws...
Like Gunnebo impreg, a special model for treated wood.
http://www.gunnebofastening.se/segbo/notesamp/internet/segbo00008.nsf/viewunid/E2CFEB7F724DBB21C12574030033CCA2/$file/IMPREG_4sid_produktblad.pdf
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There might be stainless building fittings...?
Otherwise I don't know...
Otherwise I don't know...
Attach the fittings with your electro-galvanized anchor screws and drive in a bunch of galvanized anchor nails (it's much cheaper than stainless steel anchor screws). However, remember that once you've nailed in the anchor nails, it's not easy to remove them.
Yes indeed, they will be ugly on the surface but they last. Being frugal or short on money, I nailed our decking 20 years ago with electro-galvanized ring nails, and it's a deck without a roof exposed to rain and snow. Sure, they are rusty now, but they hold well. I removed a few boards last year and the nails stayed in place, so you pulled the nail head right through the decking board. The pressure-treated wood 20 years ago probably had even more chemicals in it than today's. If you have a roof over your porch, it should be even better.
Thank you for your answers!
I have now decided on ESSVE Ankarskruv CorrSeal. I have spoken with the product manager who assures that CorrSeal can handle pressure-treated wood. I initially considered Gunnebo Ankarskruv Impreg 5,0x40, but it fell through because it is easier for me to buy ESSVE screws at the local Beijer than to drive to K-Rauta, which is further away. Additionally, it will be cheaper at Beijer with my standing discount.
I have now decided on ESSVE Ankarskruv CorrSeal. I have spoken with the product manager who assures that CorrSeal can handle pressure-treated wood. I initially considered Gunnebo Ankarskruv Impreg 5,0x40, but it fell through because it is easier for me to buy ESSVE screws at the local Beijer than to drive to K-Rauta, which is further away. Additionally, it will be cheaper at Beijer with my standing discount.
I helped tear down a porch built in 1990 where pressure-treated support beams were screwed with long electro-galvanized screws, along with various electro-galvanized fittings. They were in very good condition, with very little surface corrosion.
I have a terrace on one of the houses where the railing is screwed with Spax electro-galvanized screws and there's not much left of them after about 12 years...
I would go with Essve's screws with CorrSeal!
I think there are also anchor screws with that treatment...
(I have to correct myself, they exist!)
I would go with Essve's screws with CorrSeal!
I think there are also anchor screws with that treatment...
(I have to correct myself, they exist!)