Concrete Patio Against Siding

Concrete absorbs and holds water and most siding and trim materials including fiber cement aren t rated for contact with concrete.

Concrete patio against siding.

I d like the patio to get as close as possible to the house but am realizing that it may not be good to put the pavers right up against the siding. I would advise locating a vinyl siding company and getting them to break some scraps that they ve laying around about an inch much higher than the concrete will be poured and as far out from the house as the scraps will go. It can be cork 1 2 thick by 4 tall set to the wall with short pins to hold it while pouring. Other times an l flashing over the surface of the concrete and work but keep in mind this can also trap moisture behind the the concrete.

Any water would run all the way down. If you must do it try to install some serious flashing between the wood and concrete such as ice and water barrier protected by aluminum that goes well below any wood and up under the siding. The gravel is about now 3 4 inches up the siding as you can see in pictures. It is unknown what type of water insect access is available occurring under the siding below the surface level of the cement.

Sometimes with the siding trim and door out of the way a flashing can be slid in between the house and the concrete. Al mollitor sharon ma. I would be more interested in what the manufacturer said about this detail. For this specific situation i would rather see the concrete poured against the cement siding which goes all the way down to the bottom.

Concrete and masonry foundation walls shall extend above the finished grade adjacent to the foundation at all points a minimum of 4 inches 102 mm. If it were flashed with 1 2 inch gap like shown in the text book water could run below the flashing and on to raw wood. Observed non standard installation of concrete on the patio see photo this section. If the concrete is touching the cedar then it is not likely there is any drainage for the wrb and the cedar.

Large roof overhangs can provide protection in some cases. Editorial advisor mike guertin replies. A concrete patio is a finished grade. The siding should be 4 8 inches above the surface of the concrete.

Typically when i pour concrete against a house foundation never pour concrete against any siding imho it invites trouble later i have an expansion joint set to the house. Wrcla wants 2 clearance to prevent wicking. This does not answer how close siding should be to the grade but foundation above grade is more important. The best thing to do and it s the code in va is to put aluminum coil in between the wood and the concrete.

Show activity on this post.