Frost floor drain gully cast iron grating
Calendar 10 June, 2021 (Updated 7 July, 2023)

Visit our new website dedicated to roofing, balcony and floor drain outlets

We've just launched an exciting new website! Since we bought the Frost brand and manufacturing several years ago, we have been reintroducing it to the market and reviving this proven system.

We have refreshed the Frost branding, are in the process of changing the colour of the products and have now launched a completely new comprehensive website designed to simplify the selection and installation of roof and floor drains and balcony outlets. Visit the site at

Architects have specified Frost drainage products for over fifty years in public, industrial and commercial buildings worldwide. The rainwater outlet products have been used on prestigious projects, including Wembley Stadium, The British Library and Gatwick airport, to name a few.

Watch Frost Drainage is back! Floor Drains, Roof and Balcony Outlets that have been used for over 50 years on YouTube.

A quality alternative to Wade, Harmer and Alumasc drainage products

As one of the first product ranges developed for the purpose some fifty years ago, The Frost drainage range has often been copied and imitated. Should you be searching for an alternative to a Wade or Harmer drainage outlet for use on a roof, balcony or floor, then try using our Product Comparator to find an equivalent part number to that of another manufacturer. We offer competitive pricing and next day delivery from our warehouse at our midlands depot, where we keep good stocks.

How to install drainage outlets for roofs and floors

We have added to our new website step by step installation guides, and videos documenting how to install both roofs drains and floor drains. Roof drains are typically installed into a roof deck with a clamp to secure the roofing membrane; how range includes optional leaf and gravel guards to suit various roof build-ups. Floor drains are commonly installed into reinforced concrete floor substructure; we offer the aesthetic choices of nickel bronze, stainless steel and ductile iron gratings.

Technical Product Details for Architects and Specifiers

We have included lots of product details on our new Frost Drainage website for the use of anyone seeking to specify a roof, balcony or floor drain outlet. Should further information be required, we have also added many of the products to the SpecifedBy platform; alternatively, please contact our technical team with any enquiries or for further information.

Satisfied Customers

Exactly what they said on the tin.
"I have used Frost Gullies on a £4.5m RC Frame project where we used over 300no Frost gullies varying in type. These gullies were all "exactly what they said on the tin". They are all nice and adaptable with multitudes of different configurations possible to be used to get over any site issue or Architect requirement. Installation was no issue. Delivery was always very fast, throughout the project. I would highly recommend the Frost brand and plan to continue to use Frost on my projects in the future."
Phil Whooley, Project Manager

Sander Knight Drainfast Team Portrait

Written by
Sander Knight

Internal Product Manager

With his wealth of technical product knowledge, Sander now helps customers using the Frost drainage range.

Truck Delivery options

Enter your postcode for delivery timescales, accurate stock levels, and your nearest depot