Dutch Lap Siding which is also known as COVE Lap and GERMAN Lap and simply pattern "105" by WWPA (Western Wood Products Association) is distinguished by its curved "reveal" or channel between the installed boards. From a distance it gives a slightly rustic "log" impression.
Dutch Lap gained popularity in the late 1800's. It is typically joined with a shiplap overlapping joint but can also include a Tongue and Groove edge. It is typically face-nailed rather than blind-nailed as in Tongue and Groove patterns.
Dutch Lap Siding has 3/8” overlap with a 1 1/4” curved recessed edge. The Dutch Lap pattern provides excellent weather protection and installs with a minimal amount of effort and material wastage.
Dutch Lap siding is normally supplied in unseasoned knotty grades with a saw textured face side. Commonly available sizes are 1x6", 1 x 8" and 1 x 10".
DUTCH Lap has a rustic appearance and from a distance gives a slightly "log" cabin impression. Dutch Cove Lap is an option many people use when the cost of cedar logs is out of the budget.
The following California customer selected Incense Cedar milled to a 1x8" Dutch Lap pattern then factory finished with Duckback Cedar Natural Semi-Trans Stain.
There is only one standard Dutch Lap pattern profile.
The overlap between boards (E) is usually 1/2" leaving approximately a 1" inch curved channel (F) revealed between. The overlap and channel width can be custom modified - sometimes ;-)
The pattern diagram above is actually a WWPA Tongue and Groove pattern with a curved "reveal" similar to the classic Dutch Lap Pattern profile. The T&G end allows for blind-nailing in the tongue effectively hiding the nail. It's a specialty pattern that can be milled to order.
Dutch Lap Siding TRUE Measure
You might be wondering why our Buffalo diagram above has letters - A, B, C - instead of actual measurements. That is because siding measurements can vary from mill to mill and lumber yard to lumber yard. Using letters allows us to confirm the TRUE dimensions with the mill before we sell to our customers.
NOMINAL SIZES are for industry identification only. Even though a pattern is called 1x6" or 1x8" that does not mean it measures 1 inch thick nor 6 or 8 inches wide. Nominal 1x6, 1x8 refers to the size before the pattern profile is milled and NOT the board's final finished or "dressed" dimensions.
A 1" NOMINAL is usually 11/16ths inch thick. A 6" NOMINAL dutchlap pattern is usually 5 3/8 - 5 1/2" wide including the overlap which results in 4 7/8 - 5 1/8 inches of exposed face depending on lap depth. An 8" NOMINAL dutchlap pattern is usually 7 1/8 - 7 1/4" wide including the overlap which results in 6 5/8 - 6 7/8 inches of exposed face depending on the lap depth. This is called the pattern's "exposure" - the visible part of the board when installed on your wall.
We carry products from suppliers located all across the country so each delivery will be calculated based on location of customer, location of product manufacturer and weight of total shipment. See Areas we ship to and Delivery Information.
International Shipping and Delivery
Buffalo Lumber offers full 20 and 40 foot container quotes internationally. Europe, Asia, Africa - anywhere a container will go we can get it there. We can only quote full 20 and 40 foot containers - smaller shipments would be customer arranged.
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