Free Help with Rainwater Take Offs, Quotes, Tech Advice, Flow Calculations and Finding Installers

RAINCLEAR SYSTEMS, the specialist metal rainwater system stockist and online retailer, can help with selecting, costing and buying your client’s rainwater system.

The company offers a free take off from architect’s drawings to ensure you have a list of all the components you need, and using a rainwater flowrate calculator, they will work out what size guttering and downpipes will be required on your project in your particular geographic location. Rainclear can then let you know the cost of buying all the components from them.

If you need a special colour or a bespoke item fabricated for your project, they can help with that too. Rainclear also has installation guides and videos available to help with installations.

Take Offs explained
Just like it sounds, Rainclear’s take off service means using the architects drawings from your project, new build, refurb or extension, to make a list of all the gutter lengths, downpipe lengths, fittings (corners and outlets) and fixtures (screws, nuts, bolts, and sealant) that you need to complete the project.
Read more here.

Often the architect will specify the material and the profile to match what is already there, or in a conservation area, to comply with conservation requirements.

Rainwater Flowrate Calculations
The width of gutters and the diameter of downpipes needed, to cope with the worst the British weather can throw at them and still protect your client’s home from rainwater and the damage it can do, depends on several things:

  • The size of the roof area and pitch of the roof.
  • The number of gutter drops – how many downpipes there are decides the capacity (downpipe diameter) that is required.
  • The location and geographic area of the building and the usual and the worst rainfall it experiences (and is expected to experience in the future) based on historical records. A lot of rain in a short period of time, places greater demands on the system.
    Read more here

Rainclear Systems always tries to offer the best system for your project and your budget. You’ll receive an itemised quote and trade customers can apply for an account and their own terms.

Rainclear can also arrange fabrication of bespoke angles in aluminium or patterns to recast new cast iron hoppers to match the old. Rainclear enjoys the challenge!

Find videos explaining and demonstrating the issues Rainclear Systems is most often asked by rainwater systems installers.

If you don’t find the answers to your questions, please call 0800 644 44 26 or email

See the range of metal rainwater, drainage and roofline systems on offer.



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