stone wall
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Hello, we are going to build a wood deck on top of a concrete porch.  The only part I don't understand is what to do where the deck meets the house, because the wall is stone.  The stones are uneven and vary by an ice or so in thickness.  Should I try to cut away at the stone to make it more even?  Thanks for your help.

Hey David,

    Would it be possible for you to take either a circular saw or cut-off tool (like a 4"-6" or so grinder) with a masonry blade, and cut a horizontal slit into the stones and mortar? You could run the tool along a board (or even the ledger board of the new deck) to make a straight cut. If you cut it just as deep as the deepest part of the mortar, or slightly deeper, then you could slip a piece of flashing into it, and then caulk it into that groove. I would do this maybe a 1/4" or so higher than the ledger board, use a flashing that will angle slightly down over the top of the ledger board, then hide it with the decking.

    Or, if you feel that you already have a sufficient waterproof joint where the stone already meets the concrete slab, then maybe just leave it, and cut some notches into the bottom of the ledger board to allow the water to run under it and away from the wall.

    Maybe your concern is more aesthetics than rain... Then maybe cut an inch or more notch into that stone, and tuck the whole edge of that first deck board into it...

Let me know if any of this helps, or if you have further questions. :-)


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Michael Romano


I can answer any questions relating to decks, porches, exterior stairs & railings, walkways, access ramps, pergolas, deck roofs, screen rooms, etc... These may include design ideas, footing to framing design & construction methods, various species of woods vs. composites & pvc/vinyl materials for decking, skirting, or railing applications. I also have expertise in various rain-free systems for under-deck storage & living spaces.


I have designed and built decks and many other types of outdoor structures for over 25 years for my own home improvement company. We also perform many other types of home improvements, including window & door installation, molding & trimwork, siding, basement finishing, siding, etc. Our main love however, is decks!

NADRA - The North American Deck and Railing Association. Several Small Business & Home Improvement Contractor Alliances & Associations.

I have written several articles over the years for,, and many other deck & construction related websites.

High School graduate. 2 years of Mechanical Drawing & Architecture classes. Vocational School graduate. 2 years of Construction Technology & Carpentry classes. Many years of reading, researching, and application in the real world.

Awards and Honors
I am certified by several decking manufacturers for expert application & installation of their products.

Past/Present Clients
Mainly local residential clients, and occasional commercial clients, including restaurants, nightclubs, office buildings, etc.

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