Exterior  Slate window sill Prices  

 Exterior slate window sills are priced on using 30mm Brazilian thick slate  and  most instances  used externally
​

145mm wide Brazilian slate window sills 

145mm wide slate window sills are available in the sizes below cut from premium Brazilian black slate and calibrated to 20mm, these particular sills are used when a narrow cavity needs to be clad over.   
600 x 145 x 20mm
​Cost £12.00+vat  
900 x 145 x 20mm 
Cost £18.00+vat 
1200 x 145 x 20mm 
​Cost £24.00+vat 
1500 x 145 x 20mm 
Cost    £32.00+vat
Bespoke Sizes 
​145mm wide

200 wide Brazilian slate window sills ​

These natural slate window boards are one of best selling sizes and require little or no maintenance one installed we can also cut to your own specific lengths  
600 x 20 x 30mm 
Cost £16.00+vat
900 x 200 x 30mm
​Cost £22.00 +vat 
1200 x 200 x 30mm 
​Cost £28.00+vat
1500 x 200 x 30mm
Cost £36+vat
special Cut to size 
​220mm 

300mm wide Brazilian slate window sills

For larger size window depths these sills  are ideal as they will over lap the internal wall and also look great to boot . 
600 x 300x 20mm
Cost £24.00+vat  
900 x 300 x 20mm
​Cost  £30+vat 
1200 x 300 x 20mm 
Cost £36.00+vat 
1500 x 300 x 20mm
Cost £58.00+vat 
Special size slate sills cut to order 295 wide
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