Unintended skateboard ramp

17 Aug 2009
Reaction score
United Kingdom
We have just had an extension built and the builder has got the floor levels wrong so that the patio doors are set too low compared to the floor level in the existing building. Bottom line is the floor level drops 45mm from existing floor level to back doors of extension - distance is 3m. The floor is screed but slopes. There is about 42mm to play with in terms of adding more to the floor - but the hard bit is, this is a slope so it goes from 42mm to nothing. Self leveller might break up at the thin end, but using timber is unlikely to work because the distance is only 3m so the slope is pretty severe. I know I might have to break the screed up and start again, but obviously do not want to do this as it adds to the catalogue of other problems the builder has left me.
Thought about skimming the top of the screed and then applying self leveller (although this is going to be a big slab of self leveller), removing some of the screed to make the floor flat and then building up with self leveller after that...but truth is, I don't know what to do for the best! Can anyone help? Driving me crazy and don't have tonnes of money!
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Prime the floor with P131, screed over with stopgap 600 (can be used upto 50mm without having to add chippings) to just below the finished level you want then go over with stopgap 300.
Google the products for info

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