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The B&Q Circular Bolt Down Round Heavy Duty Galvanised Post Support Base is an essential hardware solution for DIYers and contractors looking to secure 102mm round wooden posts onto solid concrete surfaces. It provides exceptional stability and moisture resistance, making it ideal for fencing, pergolas, or decking projects, though users should note that mounting hardware for the concrete surface is not included and must be purchased separately based on the specific substrate.
| Colour | Silver |
|---|---|
| Model Part Number | NM-4850100 |
| Brand | B&Q |
No, you will need to purchase concrete anchor bolts separately based on your specific floor material.
No, this base is specifically engineered for 102mm round posts to ensure a secure, safe fit.
The 80-90 micron hot-galvanized finish provides excellent corrosion resistance, making it suitable for most outdoor environments including coastal areas.
Yes, it can be painted with suitable decorative coatings, provided you use a primer designed for galvanized surfaces.
External mounting holes provide better stability and structural integrity by increasing the footprint of the anchor points away from the central load.
Check that the anchor bolts in the concrete are fully tightened and ensure the timber post is correctly sized at 102mm.
Small surface oxidation is often just zinc salt; wipe down with a dry cloth and apply a touch-up galvanizing spray if the base metal is exposed.
To install, ensure your concrete surface is flat and level. Use an 102mm diameter round post that has been pressure-treated for exterior use. After positioning the base, use a spirit level to ensure the vertical axis is plumb before tightening the anchor bolts. For maintenance, periodically check that the bolt connections remain tight, as timber can shrink slightly during dry weather. While the galvanized coating is durable, you can clean it periodically with a mild detergent and water to remove debris. If you choose to paint the base, use a primer suitable for galvanized metal to ensure proper adhesion.
