020 3551 6206 spectrumwindowcleaning.co.uk
Patented efficient cleaning for render

Render Cleaning in London, South East and Nationwide

Spectrum are specialised and devoted to restoring render back to its former glory, with a specialist approach using a unique biocide which is mixed specifically for each job and using steam rather than pressure to completely restore render back to make your building look like it was when it was new.

If your building is looking tired and old, we will make it look like new – without the need to repaint.

We know how important a buildings looks are affected by the weathered render which is why we love cleaning and restoring render for our clients. Our job is to bring back your render to its former glory.

Neglected render that may be weathered, dirty or covered in algae, our job is to make your render look great again without the need to repaint.

What to look out for when Render Cleaning

The use of power washing render is strictly to be avoided and our expertise in render cleaning will ensure the very best results with complete peace of mind.

We recommend carrying out thorough research into the contractor chosen for you render cleaning and restoration works, as selecting an un experienced contractor can cause damage to the render. We highly advise all of our clients that power washing or jet washing should be avoided, so if this is recommended to you the render cleaning contractor is likely to not be competent in this field of work.

The cause of tired looking or dirty render?

The most common type of algae found growing on render is brown, green and red algae. The tired looking render may look like it’s dirty but actually it’s covered with a dark brown algae, and depending on its development stage the facade will also have red and green algae growing on the render.

The most common affect and cause of the discolouration in the render is algae. Render has a porous surface and with the correct level of moisture this can be optimum conditions for simple asexual cell division for reproduction of the algae in the render. This allows the algae to spread quickly and also develop over different stages.

Our unique approach as shared by other specialist cleaning contractors uses a 3 stage process which ensures the very best results possible in removing algae and heavy soiling. This involves a unique biocide which is applied to the render and the use of steam and not jet wash. The steam ensures algae and heavy soiling is completely removed.

See The Difference

Cleaning Render with the correct method

Choosing an experienced and professional contractor is very important as the inpatriate cleaning method can cause damage to the render. High pressure washers should be avoided as the high pressure forces the water deeper into the render which in the cold expands and damages the structurally bond of the render.

A full site survey should be carried out to assess the type of render and the condition of the render. We choose an appropriate Biocide for the fabric of the render, which is mixed in the correct ratios and appropriate catalysts are added depending on the type of algae and dirt that has grown or accumulated on the render. The biocide works into the poor of the render killing all algae and any living organisms growing on the render. The render is then gently steam washed with an industrial steam cleaning machine which ensures the algae is completely removed and leaving optimum results of the render. Ensuring the best steam machines are used is a critical part to ensuring optimum results for the job. The 10 degrees in difference for render cleaning can make a huge difference in the results of the render.

The third process and last stage of the render cleaning process is to apply thin layer of a completion biocide to the render which will ensure the render stay clean for longer. This is mixed on site depending on the type of render you have.

K- Rend Cleaning

Spectrum Specialise in the cleaning of K-Rend, with a vast amount of experience and knowledge in tackling in even the most demanding restoration projects, you can ensure Spectrum will bring back the K-Rend on your building to look like new, without the need to repaint.

K-Rend – Repairs

As well as cleaning, Spectrum also carry out repairs for most render manufactures. Using the appropriate methods and materials supplied by K Rend we will also carry out a maintenance services on your render ensuring if your render is old that any cracks are repaired and ensuring your render stays looking great and protecting the building from the elements for longer.

Free Estimate

Contact us now for a free estimate on any of your Render maintenance needs on 020 3 551 6206

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Why Us?

We provide a 5 star window cleaning service for London and the South East. We cover the full spectrum of window cleaning services, ranging from abseiling window cleaning and cleaning windows using access platforms to cleaning with the latest reach and wash systems, which can reach windows up to 80ft.

Our window cleaners have completed the City and Guilds Level 2 Window Cleaning course and have also completed high access window cleaning courses.

All our staff are CRB checked for working in schools or with the elderly or anyone who might be considered vulnerable. Our window cleaners also have CSCS cards to ensure we can clean windows on constructions sites.

Our Services

Fully Insured, Fully Trained and Certified

Book Spectrum with confidence. Our IRATA trained team will provide a specialist cleaning service using the safest and most efficient equipment. BSI ISO: 9001 accredited.

We use our own patented cleaning system, we invest in NEW technology to perform the greatest and most economical clean that you will have ever seen.

Our Accreditations


Spectrum has many happy and repeat customers in our portfolio. Read our testimonials to hear about our services, our quality, our perfomance and our NEW render cleaning service. Follow us on our blog and on social to keep up to date with recent projects and stories.

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At Spectrum we have developed the best and the most economical building cleaning system. Our patented system cleans your building’s render using 150°C steam, giving a premium result without the need to expensively repaint your building. We clean on site without the need of scaffolding, which reduces costs and time to you.

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Want to know more just browse our blog and case studies to see the full portfolio of cleaning that we undertake. At Spectrum we specialise in many projects large or small such as office buildings, apartment blocks, schools, NHS buildings, the public sector, housing association and more.

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