What’s the Difference Between Overlap, Shiplap, Loglap and Tongue & Groove cladding for sheds?
When buying or building large timber structures such as sheds or summerhouses or even smaller ones like dog kennels or play houses, a question we receive on a daily basis is – What is the difference between overlap, shiplap, loglap and tongue & groove ? These names may mean nothing to you so let us explain exactly what they are. Loglap, shiplap, overlap and tongue & groove are all types of timber cladding profiles that are used to form the outer skin of sheds, summerhouses and other timber structures.
Timber cladding starts life as square cut rough sawn wood as shown in the picture below –
The timber is passed through a machine called a moulder that planes and shapes the sawn wood to the cladding profiles we now know are called loglap, overlap, shiplap and tongue & groove. The planed finish that is left by the moulding machine creates a smooth face that helps with water run off. Planed timber absorbs 50% less water than rough sawn timber making it a much better option for outdoor cladding applications.
What is overlap cladding ?
Overlap AKA Feather Edge is the cheapest option when it comes to cladding your shed. The boards are thin (typically 6mm – 10mm) and they do not interlock but simply lap over one and other. Due to the thin nature of the boards they are susceptible to cracking, warping and curling up as well as premature rotting due to them being rough sawn. This profile is perfect for anyone building on a budget although we do recommend spending the extra money on a planed cladding if the budget allows.
Overlap / Feather Edge is machined from fast growing home grown timber which is known in the industry for being of lesser quality than denser slower grown timber that is imported from northern Europe.
What is Shiplap Cladding?
Shiplap cladding is the next step up the range after overlap. It is mostly machined from high quality imported timber such as Scandinavian redwood meaning it performs much better in wet climates.
There are two forms of shiplap available in the UK market –
Shiplap will either lap over the last board or interlock with a tongue and groove as seen above. Shiplap comes in a range of thicknesses ranging from 12mm – 20mm thick.
What is loglap cladding ?
Loglap cladding is machined to mimic the appearance of log chalets and is available in standard lap and tongue and groove. It is very similar to tongue and groove but is machined with a curved face as opposed to a flat face.
Loglap is usually available in thicknesses ranginf from 18mm – 45mm and is typically machined from imported redwood making it a good choice for outdoor use.
What is tongue and groove cladding ?
Tongue and grove cladding is usually 18mm thick and is commonly machined from imported Scandinavian redwood, making it ideal for use outdoors. It has a modern look and is very popular for use on houses as well as sheds and summerhouse. Each board interlocks in to the last creating a modern looking rigid structure.