Sanding concrete to angle it down slightly.

[westtra]

To give you an idea we have ha d a concrete slab with a steel built garage built. Unfortunately there is the slightest of gradients front to back so water is seeping under the roller door seal and running through the garage. Can I use a sander to angle from where the roller door touches the concrete so water from the door runs away from the garage instead of into it.

[robinhood21]

It might be easier to Kango out a channel and put a drainage channel in. Such as This.

[Spudler]

For what your after...basicly, no. Why not stick a length of "D Trim" (upvc window trim)on the slab the width of the opening?.

[westtra]

had never though of using upvc then sealing in. take it this is what you mean by d trim? http://cgi.ebay.co.uk/x1-White-Window-Door-D-Secti...

[miniman]

Who poured the slab? Surely it is for them to put it right?

[westtra]

trying to get hold of them but no joy yet, think they may be off on holiday, and as I think(may be completely wrong) its an easy fix to do my self I though i'd find out.

[Spudler]

westtra said:

had never though of using upvc then sealing in. take it this is what you mean by d trim? http://cgi.ebay.co.uk/x1-White-Window-Door-D-Secti...

Thats the one, or wider if you wish. Use this http://www.toolstation.com/shop/Adhesives+Sealants...
or this http://www.screwfix.com/prods/22070 to bond to the slab, and if you need to finish off, run a bead of http://www.soudal.com/soudal.asp?o=Construction&am... job done.

If the concrete is still green then you could use one of these http://www.erento.co.uk/hire/tools-equipment/concr...
Can be used on any concrete but very easy and effective when green (still curing).

Edited by Spudler on Wednesday 17th February 17:49

[miniman]

I'd avoid sanding it or cutting it in any way - if it goes wrong, the builder won't touch it.