Biomass Systems & Digester Tank Insulation

A perfect, seamless solution to insulating a tank

A common challenge with almost any storage tank, is how to insulate it in the most durable and cost effective way. Often, rigid PU boards are considered, but ultimately put to one side in favour of a sprayed polyurethane foam insulation. The biggest feature of the spray on application is the way it forms a protective barrier all around the tank with no joins or gaps.

How thick should the insulation be?

Whilst there are no specific rules on the exact level of insulation required, there is a always a balance to strike between long term effectiveness, and the initial cost effectiveness, i.e. where should we draw the line on the thickness we install, yet still have it perform well enough to make it worth while?

Over the years, we have found the following to be a good guideline for any storage tank:

  • Biomass water storage tank – 100mm to 120mm insulation thickness, depending if the tank is indoors or outdoors
  • Digester tank – usually 100mm insulation thickness, unless a specification states otherwise
  • Suet storage tanks – usually 90mm to 100mm insulation thickness, unless a specification states otherwise

My tank will be kept out doors

If the tank is gong to be kept outdoors, we almost always recommend a weatherproof coating to protect the insulation from UV rays and the elements, to prolongue the lifespan. We quote for applying a vapourised rubber coating, available in most common colours (olive green, grey, blue, black, white etc) and we apply the coating immediately after insulating the tank.

How much does it cost?

Each tank we insulate can vary in size and requirement, not to mention location. It is for these reasons that we calculate a unique price for each job rather than using a fixed price index or ‘square metre’ basis. Our estimating team will be more than happy to discuss your requirements over the telephone and calculate a unique price for you tank. Just call 01405 81282 and have the tank dimensions and location ready.

What does it look like?

They say that pictures say a thousand words, so have a look at the gallery below and decide if the appearance is as important as the need to insulate the tank. We applied a 90mm insulation thickness to the suet tanks, and coated the insulation immediately with a dark green rubber paint coating to protect from the weather.