ᐅ Is a drainage membrane absolutely necessary? Eaves strip, splash protection
Created on: 11 Apr 2015 14:13
C
Cissina
I have already used the search function but haven’t found any precise information yet.
We are building a new single-family house with a slab-on-grade foundation, KfW70 standard, using 36cm (14 inch) solid bricks. The slab was insulated before pouring: first the wooden formwork was set up, then the insulation, followed by reinforcement, and finally the concrete.
The base area was treated with a waterproofing slurry (also approved by our construction expert). The base has a special base coat plaster and was painted with base paint.
We have now had the terrain around the house raised and compacted by 25cm (10 inches) using recycled concrete aggregate (RCA). On top of that, gravel and paving or a terrace will be laid in the near future. Directly next to the base, in the area not protected from rain, we want to install a drip strip.
Yesterday, someone told us that we absolutely should have installed a dimpled membrane (also called a drainage membrane or cavity membrane). Nice to get this tip a day later. Neither our builder nor our expert mentioned this. The latter only said that we should install the drip strip.
What do you think? Should we tear up the entire base area and install the dimpled membrane now? Or is it too late for any benefit?
Thanks in advance for your answers.
We are building a new single-family house with a slab-on-grade foundation, KfW70 standard, using 36cm (14 inch) solid bricks. The slab was insulated before pouring: first the wooden formwork was set up, then the insulation, followed by reinforcement, and finally the concrete.
The base area was treated with a waterproofing slurry (also approved by our construction expert). The base has a special base coat plaster and was painted with base paint.
We have now had the terrain around the house raised and compacted by 25cm (10 inches) using recycled concrete aggregate (RCA). On top of that, gravel and paving or a terrace will be laid in the near future. Directly next to the base, in the area not protected from rain, we want to install a drip strip.
Yesterday, someone told us that we absolutely should have installed a dimpled membrane (also called a drainage membrane or cavity membrane). Nice to get this tip a day later. Neither our builder nor our expert mentioned this. The latter only said that we should install the drip strip.
What do you think? Should we tear up the entire base area and install the dimpled membrane now? Or is it too late for any benefit?
Thanks in advance for your answers.
Our expert has given some reassurance. The ground was only raised in the area of the foundation slab, not along the masonry. We will now remove a few centimeters (inches) right next to the house wall to insert the dimpled membrane. Since we will also install the drip edge strip, which extends higher, the dimpled membrane will protect the masonry.
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