We have built a strong reputation as one of the oldest and most well respected names for the supply of pressure treated timber gates to the agricultural, equine, local authority and domestic markets.


We are able to pressure treat timber with creosote for unrivalled long service life, or Celcure for a 15 to 30 year desired service life. Creosote pressure treatment not only extends the service life expectance of timber products but is particularly useful in agricultural applications as animals will not chew on creosoted timber.

As holders of the Royal Warrant for the supply of preserved timber fencing to Her Majesty The Queen, we take great pride in the products we produce. The fencing we supply Her Majesty can be found in situ at The Royal Stud, and we produce all our fencing and gate products to the same high standards.

With our own milling facilities and highly knowledgeable staff on site we are able to produce bespoke products as well as working with customers unique designs to create one off products.

We stock a full range of fencing and gates at our site in Boston, Lincolnshire. All our stock items are available for nationwide delivery.

To see our full range of fencing and gates, as well as garden products and sleepers, please visit our commercial website at

Production Process

Harvesting & Inspection

All our products are manufactured from high quality european softwood timber sourced from sustainable certified forests. After harvesting all timber is inspected to ensure it meets the standards required to produce high quality gates.


Timber is either kiln or air dried to below 28% moisture content prior to treatement. This leaves space on a cellular level for our pressure treatment impregnation chemicals to permeate the timber and remain in place throughout their service life.


Before the dried timber is delivered to our site in Boston, Lincolnshire it is eased and smoothed, providing the high quality finish our customers expect.


Once the timber arrives on site it is machine cut using our state of the art Hundegger SC1. This computer aided precision timber cutting machinery cuts perfectly all the timber into shape ready to be assembled. Mortice and tenon joints are shaped to fit neatly into one another without leaving any space to come loose.

Bespoke designs can be produced specifically for customers with unique design requirements.


Softwood timber is pressure treated with either green or brown Celcure solution to enhance the desired service life of the finished product. Post treatment any Calders & Grandidge gate will have a desired service life of 15 years.

We only ever treat timber with Celcure solution once it has been cut to its final dimensions. This ensures that all exposed surfaces absorb the treatment equally, resulting in a better quality product.


Once the timber has dried we hand assemble each and every gate that leaves our site. By assembling in this manner we ensure that every product we supply receives individual attention to detail by our skilled craftsmen.

This process also allows for quality checking on every single gate during its final stage of construction, meaning no individual gate can be manufactured that does not meet our quality standards.


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