waterproofing block wall has anyone heard of bidima48,it's used for waterproofing block wall's.
Any idea on how to water proof a block retaining wall, ?
When waterproofing walls you need to ensure the water that is prevented from going through the wall has somewhere to go.
This means installing a drain, best done just below the top of the footings and falling away to both ends for good drainage.
The other thing to look for is that the not only the wall, but also the wall to footing interface is treated, this prevents water getting under the wall.
Do you plan to do the waterproofing yourself?
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Growing old is compulsory, growing up is not.
http://www.wet-seal.com.au/waterproofing/locations.html
Are you doing the water side (positive pressure) or the 'dry' side (negative pressure). ?
I am about to re seal our concrete block water tank and have been told this is the stuff to use - can be applied from the outside.
SILASEC
David L
"A dedicated amateur will always do a better job than a slap dash professional"
I agree with what has previously been said above, prevention is better than any cure. Check out the Gripset web site. They have some good products that can be used on the positive or negative side. Different products both sides www.gripset.com
do you mean Bidim? If so thats a geotextile to put across the fill part Continous Filament Geotextiles, Staple Fibre Geotextiles, Woven Geotextile, Nonwoven Geotextiles, Geotextile yu can get it at Landscaping centres.
Depends on what the engineer has specified I would be looking to
- Tank the wall in Gripset or similar
- Fibro sheet hard up against the wall to stop punctures of tanked wall
- Vertical drain, like this Walldrain Panel Wrimco Waterproofing Co -
- Agg pipe connected to vertical drain
- then bidim against the earth and then back fill with something that will not hold water
- also a dish drain may be required.
http://pmqhouse.blogspot.com/ blog virgin.
Is it possible to just use plastic sheeting to waterproof a block wall (probably the black builder's moisture membrane)? Please correct me if I'm wrong, can we really properly waterproof dry stack walls (ie. no cement/grout/glue between the blocks) with a paint-on waterproofing compound - I would think that these dry walls would be subjected to some minor movement which could break a paint-on waterproofing membrane?? Or is this totally wrong ....
Also, why is it needed to waterproof a block wall - would it prevent the blocks from getting all grey and stained in a few years time? Is the discolouration and staining simply due to moisture behind the wall? Can those stained blocks ever be cleaned from those stains?? Thanks
Hold on, are we talking a dry stack wall or a properly construction block wall with mortar joints and a concrete footing? The rules change quite considerably. A dry stack wall will move but a agg drain behind the wall will at least remove some of the moisture, the rest will permiate through the wall.
If it is lock together mortarless retaining wall then paint-ons won't do the job. In both cases as mentioned above - whatever you do the water has to be moved away because you are effectively turning the wall into a dam (Otherwise part of the design would have weep holes/ pipes at various places to allow the water to pass through the wall). That means designing and building with that in mind from the bottom up. So ag pipe, proper drainage slopes aggregate geo-fabric and so on. Builders plastic can be part of that design & build too care not to create a tear in it at any stage of course.
Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.
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