Description
Pressure-treated redwood shiplap cladding for exterior sheds, summerhouses, workshops and garden buildings. These 19 x 125mm boards finish at approximately 14.5 x 119mm after machining and use a rebated overlap profile for a neat traditional shiplap finish.
Where this exterior shiplap works best
Choose treated shiplap cladding when you need durable timber boards for outdoor cladding, shed walls, summerhouse cladding, workshops, stores and similar garden-building projects. The pressure treatment helps protect the timber for exterior use while still leaving the board with the familiar softwood look.
Board size and lengths
- Nominal size: 19 x 125mm
- Finished size: approximately 14.5 x 119mm
- Available lengths: 3.6m and 4.8m
- Profile: rebated shiplap overlap cladding
Choosing the right shiplap board
This treated redwood option is the best fit for exterior shiplap jobs. For internal lining, temporary work or protected projects where you want to apply your own finish, compare our untreated softwood shiplap cladding. If you are still choosing a profile, browse the full shiplap cladding range, compare loglap vs shiplap, or view all timber cladding boards.
Fitting notes
Fit shiplap boards horizontally with the rebate facing down so water sheds away from the joint. Leave sensible expansion allowance, support the boards on suitable battens or framing, and finish cut ends appropriately for exterior use.