The length of a granite countertop without a seam can vary depending on several factors, including the size and availability of granite slabs, the layout of your kitchen, and the structural support required. In many cases, granite slabs are typically available in sizes up to 10-12 feet long and 5-7 feet wide. If your kitchen layout allows for it and the chosen granite slab is large enough, you may be able to have a countertop without a seam for up to 10-12 feet in length.
However, there are limitations to the size of granite slabs due to their weight, transportation, and installation considerations. Larger slabs can be more challenging to handle and may require specialized equipment during installation. Additionally, if your countertop is very long, it may require additional structural support underneath to prevent sagging over time.
If you have a kitchen layout that requires a countertop longer than the available slab size, or if you prefer to avoid seams for aesthetic reasons, you can discuss custom options with granite suppliers and countertop fabricators. In such cases, they may be able to join two granite slabs carefully to create a longer continuous piece with a nearly invisible seam, although this can increase the cost and complexity of the installation.
It's essential to work with a professional granite countertop installer or fabricator who can assess your kitchen's specific requirements and provide expert guidance on the best approach for your project. They can help you choose the right slab size and layout to achieve your desired look while ensuring structural integrity and longevity.