Return to the Porches & Decks Forum | Post a Follow-Up

 o
Concrete Blocks Crumbled on 8 x 17 porch: New Deck Over Top?

Posted by rru2s (My Page) on
Tue, Aug 29, 06 at 14:21

My 8 x 17 concrete back porch (2 ft. to 4 feet high) has about 4" concrete slab supported by concrete blocks. Gradually over the last 20 years several of the blocks under the top slab have crumbled all the way through.

I want to cost effectively fix the problem or rebuild. The slab has not collapsed yet but has a few hairline cracks. About 4 linear feet of concrete block has crumbled to nothing, just the top level of block by the steps, and in another area 2 linear feet of block, top level, by the taller steps, plus lots of hairline cracks tracing along the block seams on the side walls. The porch was built about the time of the addition, according to previous owner this would be around 29 years ago.

Here is the big question -- I want to permanently fix the problem, but don't want the expense of a complete new porch of this large size.

(1) Can this level of concrete damage be repaired? Temporarily or permanently? Relative cost versus doing a deck over it?

(2) Can I just build a deck over the top and ignore the deterioration of concrete without problems later when it falls apart? Note that the concrete slab is only about 6 inches below the slider of my family room, possibly not enough height room to install a joist for a deck anchored to the house. I don't think I should use the porch itself to support the deck over it because the main problem is the porch itself could collapse at some point in the next 3 to 5 years.

(3) Can I just demolish the concrete slab over the top of the porch and knock down the top layer of side concrete blocks, letting all the debris rest in the center of the hole. Then I can build a deck over and around the old sidewalls, using standard wood deck construction, and anchor the deck to the house?

(4) None of the above - any other suggestions?

There is not a water problem at the moment, but I have a cape cod house. It is possible the steep roof in conjunction with my gutter guards have allowed more water to roll over the top of the gutters and onto the porch over the years (solve one problem, create another). It is also possible that using salt on icy days in the winter on the porch also caused problems over the years.


Follow-Up Postings:

 o
RE: Concrete Blocks Crumbled on 8 x 17 porch: New Deck Over Top?

I kinda like #3. John


 o
RE: Concrete Blocks Crumbled on 8 x 17 porch: New Deck Over Top?

Hi,
I've just discovered this site and am curious how your solved your problem. I have a concrete porch consisting
of just 3 steps with the top being about 4 ft. square or
a little smaller. I'd like to make the steps larger and
add a little decorative style. Wondering if I can add
to the size without starting all over. (which I definitly
won't do. - too much work)
Our house has half-log cedar siding and a smallish cedar
deck would look nice there too so wondered if you did that.
Thanks a bunch.
Granny


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Porches & Decks Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here