Open For Online Ordering

For safety and to manage demand, we are limiting daily orders taken online. When we hit today's limit we will close until the next day. You can also contact us by emailing

Please see further information regarding our current opening status and how we're dealing with collections, deliveries and enquiries here.



Category: Landscaping

Postfix is a very useful product and it is great to use in the garden to set gate and fence posts and a great base for paving and pathways. Used for many DIY tasks and industrial use, in this blog we explore what is post fix and how do you use it.

What is Postfix?

Postfix is a ready-made concrete mix which is ideal for setting timber, metal or concrete fence posts, gate posts and line posts. The mixture consists of cement and ballast and produces good quality concrete, which is fast setting so you can have your posts ready and set in no time.

The benefits?

Postfix is a really popular concrete product and here’s why:


Ready-made concrete such as postfix is extremely versatile and can be used for many different tasks.


Mixing your own concrete to set posts is very time consuming. By opting for ready-made postfix, you reduce the time and effort spent mixing your own. Postfix is a fast-setting formula for any job where speed is essential. In the long run, you also save costs by purchasing a ready-made formula.

More Environmentally Friendly

Postfix uses low CO2  cement. This is due to the more efficient mixing methods, which allows cement and waste productions to be kept to a minimum. This is beneficial for the environment and a great product for those who aim to be more sustainable with their methods and work.  


Any ready-made postfix will be made to a high specification, so you can remain assured that the postfix you purchase from us will be of a high and consistent quality.

How to Use Postfix?

Now you know what postfix is and its key benefits, here’s a simple step-by-step guide on how to use Postfix. To quickly set you fence posts, you simply need to use water and the postfix. Below you can find mixing instructions for our 20kg Rapid Set Postfix.

Mixing Instructions:

  • Dig hole to correct depth and width relevant to post size
  • Fill hole approximately a third of depth with water and place post in hole
  • Pour in postfix evenly around the post until no standing water is visible
  • Position and level post as required. Setting will take place in 5 to 10 minutes
  • Do not mix postfix with water by hand or machine

Whichever postfix brand you choose, you will find full instructions on every 20kg bag of post mix to make things as easy as possible for you.

Article Listing
Total Pages:
Total Results:
Page Start:
Page Result #:

©IBT Building & Timber Merchants Ltd • Registered in Scotland SC229110 • All Rights Reserved • Website presented on Big RedLog in


Contact Us




Check User:

This form collects and sends the information supplied to Innes Building & Timber. You can read our privacy policy for full details on how we protect and manage your data.
  I consent to having Innes Building & Timber collect the above details.