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Post Holders
Post holders, also called pole holders, are cast iron flat footrests that hold a square timber post upright and clear of the ground, for pergolas, fences, carports and garden structures. We stock six sizes for posts from 70 mm to 200 mm square, each 140 mm tall with a black protective coating. Bolt them onto a concrete pad or paving, or set them into wet concrete. Stocked in our warehouse and delivered across Ireland.
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Post Holders for Wooden Posts in Ireland
If you have gone to the trouble of choosing solid timber posts for a pergola, fence or garden structure, the last thing you want is for them to rot at the base. A post buried in soil or concrete wicks moisture up its end grain, fungi take hold, and the post can be hollow inside while it still looks sound. A cast iron post holder lifts the post clear of the ground on a flat footrest, so the end grain stays dry and air can move underneath.
It is one of the simplest ways to extend the life of an exposed post, and it lets you remove or replace a post later without breaking up concrete. Cast iron is heavy and stable, and copes well with Irish winters.
Post holder sizes
Each holder is a square cup on a flat base plate, 140 mm tall, with drilled holes for fixing. The cup is sized just over the nominal post size, so match it to your post:
- 71 x 71 mm: for 70 mm posts in light fencing, trellis and small garden frames.
- 91 x 91 mm and 101 x 101 mm: for 90 mm and 100 mm posts, the common sizes for fence posts and pergola uprights.
- 121 x 121 mm: for 120 mm posts on sturdier pergolas and carports.
- 151 x 151 mm: for 150 mm posts, such as our oak and Douglas fir beams.
- 201 x 201 mm: for heavy 200 mm posts on large structures.
Post holders vs concrete post bases
Both keep your posts off the ground, so the choice comes down to where you are building. A post holder is slim and bolts straight onto an existing slab, patio or concrete pad, which makes it ideal for retrofits and structures on hard ground. Our concrete post bases add real mass and height, and suit new pergolas set into soft ground. For the top of a 150 mm post, post connectors join the beams without cutting joints, and concrete screws fix into masonry without plugs.
Fitting a post holder
Getting the footrest level is the step that matters most, as adjustment afterwards is limited:
- Set the footrest into wet concrete, or bolt it onto a cured pad with masonry anchors of M12 minimum.
- Check it is level before the concrete sets.
- Slot the post into the cup, plumb it, and secure it through the bolt holes.
- Brace tall or exposed posts temporarily until the concrete has fully cured.
Looking after post holders
The black protective coating does most of the work, and most people leave it as it is. For extra corrosion protection or a refresh after a few seasons, a coat of cold galvanising spray or exterior metal paint adds another layer. Look after the timber too: with its end grain kept dry, a post oiled every two or three years with our exterior oils and stains keeps its colour and sheds water.
Browse the full range of outdoor timber hardware, and choose your timber from our posts and beams.
Frequently Asked Questions About Post Holders
What sizes of post holder do you stock?
Cast iron flat footrest holders for posts of 71 mm, 91 mm, 101 mm, 121 mm, 151 mm and 201 mm square, each 140 mm tall. The cup is sized just over the nominal post, so a 151 mm holder takes a 150 mm post. Choose the size that matches your post’s section.
How do I fix a post holder?
Set the footrest into wet concrete or bolt it onto a cured pad with masonry anchors of M12 minimum, and make sure it is level before the concrete sets. Brace tall or exposed posts until the concrete has fully cured. Our concrete screws fix into masonry without plugs.
Will a cast iron post holder rust?
It has a black protective coating that most people never touch. For extra protection after a few seasons, a coat of cold galvanising spray or exterior metal paint adds another layer of corrosion resistance and keeps it looking sharp.
Why use a post holder instead of concreting the post in?
A post set straight into soil or concrete wicks moisture up its end grain and can rot from the inside. A post holder keeps the timber above ground with air underneath, so the end grain stays dry, and you can replace the post later without breaking up concrete.