serrated spat

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brimplas1

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ive seen these being used on you tube and was wondering what the advantage is and when and where to use it?
 
wondered that one myself, saw a lad with one for sale at a car boot sale. told me he used it on krend, could not work out the advantage
 
Very popular and common in Germany.

you have a completly flat background (insulation / board) and then apply the first layer of basecoat before mesh using the serated spat means that you have exactly the same thickness of basecoat applied to a flat backing.....

embed the mesh into the serated layer (this then ensures that it is all in the same level), then apply a smoothing coat over the mesh, while it is still wet.

This leaves a completely flat basecoat layer, ready for finish coat


At least - that is what all of the German Technicians who I have spoken to about it state anyway!
 
the vid I saw was using it on ordinary s and c and said it opens it up so you can rub it up soon ?? don't see it my self!
 
As madmonk said it finds the hollows. When you use a straight edge it might look flat but you could have a few hollows a mm or 2 deep. A serrated will not only highlight every hollow but you will have a very flat wall with no trapped air. Soon as, spat the serrated wall to super flat.
 
Use the serrated as soon as. When the mortar is wet it is easy to move around then after you have serrated a given area spat the grooves out whilst it is wet and shiny.
 
The spat is used for basecoats on ewi bedders or a 6mm notched trowel the serrated rule is for mono and no they dont do the same thing the spat or trowel gives an even coating on the eps and the rule shows up hollows on the mono
 
So don't hollow the mono Beddy, anyway in my experience, which isn't lots I used to rule my mono flat but don't bother to much these days near enough and the I section takes care off it.
 
What is the best one to buy and where from, can you get a 10mm serrated edge. Thanks

We stock serrated Edges, they come as a standard 1.25m Length.

As mentioned above a 10mm would normally be a Notched trowel used on basecoats. The normal depth of the teeth on a Serrated Edge are 5mm
 
Somebody told me they are to get air-bubbles out of weber and polymer rich mortars ..... above sound good to me though :)
 
We use a serrated edge for mono jobs, we used to use a derby but found it leaves too many air bubbles which come through when we scrape back.
As far as serrated edge for base coats for ewi we dont bother as its easy enough to get a even coat on without a serrated.
 
got my 19" serrated spat the other day and used it today whilst topping of some s & c ! im well happy with it, really made the job easier..
 
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