Treated Shiplap Cladding for Exterior Projects Our 120mm x 12mm shiplap is a high‑quality, pressure treated timber solution designed to deliver durability, protection, and a clean, attractive finish to outdoor structures. Made from planed softwood, this cladding offers a smooth surface that enhances both appearance and performance. Cut with precision tongue and groove edges, each board fits neatly together to create a strong, weather‑resistant profile with a consistent 110mm coverage. The overlapping shiplap design helps direct water away from the surface, making it an excellent choice for long‑lasting external cladding applications. Ideal for sheds, garden rooms, garages, and gates, this treated shiplap cladding is built to withstand the elements. Pressure treatment helps protect the timber against rot, decay, and insect attack, ensuring a longer service life and reduced maintenance over time. To keep your cladding looking fresh and protected year after year, check out our range of preservatives and paints. Whether you’re upgrading an existing structure or starting a new project, this shiplap delivers both reliability and visual appeal. Key Features of Shiplap Cladding 120mm x 12mm external cladding. 110mm effective coverage per board. Pressure treated for enhanced durability. Planed finish for a smooth, professional look. Tongue and groove edges for strong, secure fitting. Ideal for all types of exterior cladding projects. Please note: Timber is a natural product. Finish, colour and sizes may vary from illustration and description. While every care is taken to provide you the best material, with it being natural it can move, split, warp, twist, swell and shrink.
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