Home>Discussions>EXTERIORS>Deck with roof dangerous?
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Aaholland
Deck with roof dangerous?

We moved into our house 2 years ago. It was built in 1978. Everything has been great but now the deck with a roof on the back yard has started leaking. It is about 18 x 20. The top of the roof is shingled and attached to the house. The master bed room above the deck has a door that leads out to the top of the deck where the shingles are.

The roof is not angled enough which is causing the water to pool and flow back under the singles. One question is could I just install a metal roof and replace the rot in the ply wood? Other question is after inspecting the deck it apears that the big corner support beams for the deck roof are just sitting ontop the flooring of the deck. The deck foundation is a cinderblock wall. That does not seem like the correct way to hold the roof up. I thought the support beams were supposed to connect to a footing of cement buried fairly deap?

So is the deck safe at all? Will it need to be torn down and totally redone? Or can i just fix the roof problem and move on?

I will get some pictures tomorrow

A. Spruce
Re: Deck with roof dangerous?

To post pictures you have to upload your images to a photo host, then link the images here. Due to spam issues, we no longer have the ability to directly place them on the TOH site.

Without seeing the situation, it will be hard to determine whether or not the construction is sound. A normal house is framed similarly to what you describe, and I've seen plenty of wrap around porches built similarly, where the porch is simply an extension of the house, rather than a grafted on structure, in which case, posts tend to be set in footers as you mention.

Aaholland
Re: Deck with roof dangerous?

I went out and took pictures of what holds up the roof. It does not look like any support beams actuality are attached to any footers. They just sit ontop of the deck flooring which is ontop of the cinderblock wall. Let me know if i need any more pictures to determine if this is safe or not.

In this picture you can see the beam in the corner and the 2x4s going all the way around.

This picture shows the corner beam and 2x4s are just sitting ontop of the deck floor.

HoustonRemodeler
Re: Deck with roof dangerous?

How old is the add on roof?

Can you see the framing from below ?

keith3267
Re: Deck with roof dangerous?

The deck is not living space and placing the posts for the roof on the deck boards is perfectly normal.

dj1
Re: Deck with roof dangerous?

From the pictures, I can see how the corner 2x4 is double nailed into the deck board. Additionally, you can nail the bottom plate of the roof structure to the deck boards - 2 galvanized nails between studs.

What you have is not a perfect construction and it's not the way I would have built it, but (and without seeing the top of the structure) I don't think there is an immediate dangerous situation here. Again, you might want to get a pro's opinion after inspecting it.

Quote: "One question is could I just install a metal roof and replace the rot in the ply wood?" Yes you can. Again, I can't see the roof and the rotted members, but go ahead and clean them out.

A. Spruce
Re: Deck with roof dangerous?

As DJ said, not how I would have done it, but nothing particularly alarming either.

As long as all the wood is structurally sound, it isn't likely worth the time or investment to tear it out and do it properly. Yes, you can do rot repairs to what you have, just don't compromise your structure while doing it or because of it (the repairs ).

Reasons to replace it, in no particular order:
1 - You're a perfectionist and can't stand it like it is.
2 - Your insurance requires code compliance.
3 - The building department has called it into question and requires it done properly.
4 - Your selling and it has been called as an issue by the buyer's inspector.
5 - Your CDO (see my signature line ) won't allow it to remain this way.
6 - Your wife will divorce you over it.
7 - The 4 horsemen of the apocalypse are headed in your direction.

dj1
Re: Deck with roof dangerous?

From Spruce's reply: #6 really worries me.

Aaholland
Re: Deck with roof dangerous?
A. Spruce wrote:

As DJ said, not how I would have done it, but nothing particularly alarming either.

As long as all the wood is structurally sound, it isn't likely worth the time or investment to tear it out and do it properly. Yes, you can do rot repairs to what you have, just don't compromise your structure while doing it or because of it (the repairs ).

Reasons to replace it, in no particular order:
1 - You're a perfectionist and can't stand it like it is.
2 - Your insurance requires code compliance.
3 - The building department has called it into question and requires it done properly.
4 - Your selling and it has been called as an issue by the buyer's inspector.
5 - Your CDO (see my signature line ) won't allow it to remain this way.
6 - Your wife will divorce you over it.
7 - The 4 horsemen of the apocalypse are headed in your direction.

1-nope
2-I hope not
3-nope
4-nope
5-nope
6-dont think she will (we do want to build a balcony off our master bed room on top of the deck roof at some point but neither of us want to spend that much money since I am assuming it would take much better support than the roof currently has.)
7-maybe

Ok so the consensus is to leave it as is and fix the roof. The roof is defiantly not at enough of a grade. That is why I was thinking about using a metal roof instead. I should be able to slant it enough to keep the water running out. The ceiling seems to have a small dip before it gets to the end of the deck where the water would pour over which is making the water collect and leak through the ceiling.

So I need to tear out all the rotten wood in the ceiling and replace it and I should be able to put a metal roof right on top of the shingles?

Since I cant rip out the floor since it holds the whole structure up and replace the flooring I guess I can power wash the floor boards and sand them down and paint?

A. Spruce
Re: Deck with roof dangerous?
Aaholland wrote:

Ok so the consensus is to leave it as is and fix the roof. The roof is defiantly not at enough of a grade. That is why I was thinking about using a metal roof instead. I should be able to slant it enough to keep the water running out. The ceiling seems to have a small dip before it gets to the end of the deck where the water would pour over which is making the water collect and leak through the ceiling.

A metal roof will probably be a better bet, IF, you can tie it into your existing roofline and keep the connection watertight, otherwise, stick with rolled roofing or similar that can be grafted to the existing.

Quote:

So I need to tear out all the rotten wood in the ceiling and replace it and I should be able to put a metal roof right on top of the shingles?

You may have to remove the roof to get all the rot. When a roof fails, it starts rotting the roof deck first, as the hole gets larger, water infiltration increases and you start getting staining/rot into the ceiling. There is only one way to repair roof deck, and that is from the top.

Quote:

Since I cant rip out the floor since it holds the whole structure up and replace the flooring I guess I can power wash the floor boards and sand them down and paint?

Sure you can, you simply raise the wall plate enough to do so. It should be easy enough to remove any fasteners in the bottom plate of the wall, then simply drive some shims under where you're working. You only need to be able to do a couple boards at a time. The old can be cut out, old fasteners broken off/driven flush, then the new board can be slipped into place. If it were me, I'd do each end wall first, staggering the free ends (toward the center of the porch ). Once you have both ends done, go back and fill in the interior space. The long outside wall can be supported in several places along its length to allow replacement of the edge board. Now, this is only necessary if the boards need replacement due to severe weathering or rot, if they are in good general condition and just need cleaning, then go that route, but you may not want to use a pressure washer as it will tear up the wood very quickly, requiring heavy sanding later. As long as it's not layered in dirt or moss, simply sanding should do the trick.

I would recommend treating/painting the ends of the deck boards that are exposed to the weather to keep them sealed and prevent rot and further checking.

keith3267
Re: Deck with roof dangerous?

There should not be any code issues as this is not a living space, a space meant for continuous occupancy.

I would not recommend a metal roof, but it is doable. Since you want to eventually make a deck out of it, I would strongly recommend that you use a seamless rubber membrane instead. You can use a rubber membrane with metal over it, but I would not do that either.

My suggestion is to tear off the whole roof and check the joists to see if they are adequate to support a roof top deck. A 20 foot span will require 2x14's. An 18 foot span may get by with a 2x12's. You will also need an anti-racking brace at the outside corners running parallel to the house. The house should take care of racking forces into and out from the house, but the outside wall must be braced to prevent the top from going side to side.

If you have those 6x6 posts along the outside wall, at least one in the center, you could run an LVL from it to the house, then tie in the joists from side to side to it. That would reduce the joist size down to 2x8 for a 10' span. If you have two posts in that outside wall, then you could have two LVL's and reduce the span to under 8' so you can get by with 2x6 joists.

If you don't do this with the current roof, then you will have to do all this for the deck when you do that. With a seamless rubber roof, you can then put down some type of decking on top and you have your deck.

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