I got a response from Cedarlan - see below:
Thank you for your enquiry. Please find the attached PDF of the two types of Cedar Cladding we carry in stock, the Cedar TG& V (Tongue, Grooved & V-jointed) and the Cedar Shiplap Sheeting. The coverage of TG&V is 80mm, with the larger Shiplap covering 115mm.
We supply only these products from our Workshop on Monahan Road, Cork. (Please allow 5 working days for delivery of quantities over 30m2).
These two types of cladding have become very popular in recent months, in particular the shiplap profile which is being used for horizontal cladding on various developments and dwellings. (We recommend after research that both should be cladded horizontally, unless absolutely necessary. Vertical cladding is at the clients risk.)
Cedar as a timber has excellent duribility due to natural oils in the timber and has quite good insulation values, which are becoming more prevelent every year. The timber can be treated or left raw to become a silvery grey colour, which is becoming a growing trend specified by both clients and architects alike.
If being treated, we find a product by the name of Sikkens has always done the job, and this can be got in varying stains from most good paint suppliers. (Please note we supply the timber raw).
The cedar can be sourced in varying lengths fom approx 2 - 4 metres.
The rates are as follows:
Cedar TG&V : €52.50 per m2
Cedar Shiplap Sheeting: €52.50 per m2