I've just reassembled an 8x10 metal arrow shed, it's been apart for a few years but is nice and strong assembled. The problem is that I build a wood floor (as per the plans) and it is about 4 inches wider and longer(on each side) than the shed. And I haven't attached the shed to the floor yet.

When it rained this weekend, some water accumulated on the part of the floor that sticks out, and then came under the walls into the dry interior.

I'm trying to figure out the best way to deal with this problem...so far I've only thought of getting some kind of sealing material and putting it between the floor and the 1" wide base of the walls.

Can someone suggest what the best sealing material would be, or better...a plan for keeping the rain from accumulating around the extra floor area that's outside. I can slid the shed over to that it's flush with two of the sides of the floor, but that still leaves two other sides where the rain water will accumulate.

Any ideas for me???

jc

 

Ideally you would install a flashing to keep it dry. Caulking would work but may fail over time.

 

How would I install flashing...the walls are corrugated, and the eaves are about 1/2", not enough to even slow down the rain. Could you explain how I would do the flashing, if there was a way then it could extend over the excess floor and protect the exposed wood.

Flashing, as I understand it, would have to be tucked under something to make it work...and in this case all I have are these corrugated 1 and 2 piece walls. Maybe I could run flashing under the walls and 6 inches up the inside wall. It would take a torrential downpour to get by that. Does that make sense?

jc

 

Ya, that's the way I would do it. Make a Z flashing that would start on the inside of the shed wall, go under the shed wall covering up the excess floor and then down to protect the sides of the floor. I suppose a 2 piece L shaped flashing would also work.

 

The wood floor is larger than the shed? That's NOT good! The floor ouside the walls will get wet and rot.

A "Z" flashing, as marksr suggested. is the best solution.

If the floor projects out 4" beyond the wall on each of the 4 sides, your flashing has to be 4' plus the thickness of the wall on its horizontal leg, bend up an inch or two inside the wall, and down more than the thickness of the floor on the extreme outside. You need to prevent water from being able to get to the floor.

 

I'm going to get some rolls of flashing at Home Depot, they come in different sizes. The only problem is what to do at the corners...do I cut individual flashing pieces for each wall, then I have to seal them where they overlap. Or do I try to somehow bend them around each corner.

Any ideas about this?

jc

 

I would think it would be easiest to make separate corner flashings.

 

Corner flashings would then have to be overlapped and joined/sealed to the wall flashings...how best to do this? Also, to make the corner I think I'd have to either cut the flashing and overlap at the cut, or have some kind of overlapping bend. Does that make sense?

jc

 

Yes, you want the corners to overlap the sides. It shouldn't matter if the corner piece is over or under the side flashing - whichever would look better. I'd also caulk under the overlap to insure it's sealed.