Monthly Archives: May 2017

EWI Store is hiring!

We’re excited to say we’re looking for a full-time assistant sales executive to join us in Chessington and help as we grow our brand. Do you know anyone who fits the bill?

The role is a great opportunity to take a first step into business development, with generous commission and growth opportunities as the business expands.

Job description

 Sales-driven, promoting the company’s distributed range of products.

 Office-based with the potential to support field based sales

 Selling to a mix homeowners and small-to-medium specialist installers

 Working with a field salesperson to following up leads and enquiries

 Monitoring online lead generation tools and following up leads

 Salary: £18-£30,000 OTE

 Performance-based bonuses available

Person requirements

 Strong personality

 Happy being new business-focused

 Team player

 Able to build relationships

 Good access to the office

 Ambitious and driven

Company information

 Rapidly expanding business

 Very ambitious

 Established in the market

 Growing market share

Please send a CV and cover letter to telling us why you would be suited to the role.


Where can I buy insulated render?

What is insulated render?

We get plenty of people calling us to buy insulated render, but often they don’t understand exactly what that means. Insulated render does not mean insulation within the render itself, it is simply another way of saying a layer of insulation buried beneath the render. In the industry, the more commonly used term for this is external wall insulation, solid wall insulation or EWI.

There are many variations on this product available, but they all have one key thing in common: there is a layer of insulation fixed to the wall, and then a layer of render applied on top.

How is insulated render installed?

For most systems, a mineral wool or expanded polystyrene board is fixed to the wall with adhesive and mechanical fixings. This insulation sits on the outside of the wall and is usually 90-100mm thick, although there are other thicknesses available and we have seen people going up to a thickness of 200mm.It tends to be that the thicker you go, the better insulating benefits you will achieve. Our systems are comprised of EPS, Mineral Wool and Wood Fibre – so you can choose which insulation material depending upon your property and your personal preference. EPS is our most cost effective insulation material, Mineral Wool offers unparalleled fire resistance and Wood Fibre is fantastic if you are looking to be eco friendly with your insulated render. Read more about our different insulation materials here!

Many people use insulated render as a means of covering over their existing render; be it pebbledash or something other, we recommend installing 20mm of EPS over the existing render and then applying our thin coat renders on top. That way, you get a fantastically fresh looking property and you get the added benefit of increased thermal performance.

After installing the insulation boards onto the wall, the surface is prepared and a basecoat is then applied. A fibreglass mesh is run through the basecoat to add extra tensile strength, prevent cracks and and create a strong stable surface on which to apply the top coat. Lastly, a top coat of Acrylic, Mineral or Silicone Render is typically applied to create a quality finish. Our insulated renders come in a wide range of colours – we have special mixing equipment so you can choose any colour and we will mix it up for you!

As part of the job, plumbing is often adjusted to accommodate the insulation, and windowsills will often need to be adapted to allow the insulation to fit underneath. The whole process will take a couple of weeks on the average house, and you will end up with a very different looking property to when you started.

Typical components of insulated render

Although there are different systems available, a good insulation job will have the following as part of the system:

  • Insulation board made of EPS or mineral wool
  • Adhesive to fix the boards
  • Mechanical fixings to attach the boards
  • Base coat to apply on top of the boards
  • Mesh to lay into the base coat
  • Starter track and beading where appropriate to create clean, straight edges
  • Top coat to create a quality finish

If any of these products are missing from your insulation job, you should probably check that your installer is doing all the stages necessary.

Which is the Best Insulated Render Top Coat?

Acrylic Render: Acrylic is what most people think of when they think of insulated render top coat. It is most renowned for coloured render because it is so great at holding onto colour pigment (think of the vibrancy of acrylic paint). Acrylic render is very impact resistant, so if you have kids who love kicking footballs against your walls acrylic render is right for you!

Silicone Render: Currently, our top of the range insulated render top coat is our Silicone render. Silicone render offers unsurpassed breathability and vapour permeability (it will allow water vapour to escape through it, thereby preventing damp). The inverse of this is that it’s also hydrophobic, so there’s no chance of water getting in. Silicone render is also self-cleaning, so it’s definitely the top coat to choose if your house is situated in an area where there are lots of trees and plant life.

Silicone Silicate Render: Silicone Silicate is very similar to silicone in that it offers excellent breathability and vapour permeability. The only real difference between the two is that Silicone Silicate will only offer a limited amount of resistance to organic growth. It’s therefore better suited to properties that do not require a high level of self cleaning capabilities.

Mineral Render: Mineral render is a great choice if you live in a particularly harsh climate. Because of the fact that it’s fast drying, it can be installed in cold or humid conditions, nevertheless it does require painting with a silicone paint after it has dried to prevent the formation of lime bloom – which is essentially like a cement ‘disease’ which makes your house render appear patchy.

What does EWI Store offer?

EWI Store is one of very few retailers to specialise in external wall insulation. Where there are plenty of rendering suppliers out there, we really pride ourselves on our external insulation systems and have plenty of options to offer you in store and on our website. If you have any questions about how EWI works and if it might be right for you, or you have a technical question on how to install the systems, just give us a call and we will be happy to help.

Whilst you are here, you may want to check out our calculator. This tool allows you to get an immediate quote for your EWI materials, by simply inputting the size of your job.

Looking for Installers? Fill out the contact form below and we will be in touch…

Approved Installers Request Form

Your Name*

Your Email*

Your Number*

Your Postcode

Additional Information

I would like to receive news and offers from EWI Store

Different types of beading for render/external wall insulation systems

At EWI Store we offer many different types of beading, all designed to help strengthen specific areas of the render system or external wall system. You will notice many of our beads have mesh wings – these are designed to be embedded within the basecoat layer of thin-coat render systems.

EWI-66520 Corner Bead – 2.5m

Corner bead, as the name suggests, is used on the corners of the building to provide additional strength. Corners are more liable to encounter knocks than other areas of the wall surface, so it is therefore very important to provide extra reinforcement via this type of beading.

The corner bead also helps provide a perfect 90-degree corner, as well as ensuring a straight line up the corner, giving a more aesthetically pleasing finish once rendered.

This EWI-66520 bead is specifically for thin-coat render systems. The bead is covered by the basecoat adhesive and render, so once the job is finished you will not see any of this corner bead protruding out of the render system (unlike monocouche/scratch renders, where the corner bead is visible in the system).

Corner beads are not required in internal corners – only external corners!

EWI-65901 Flexible Corner Bead – 25m

While EWI-66520 is great for reinforcing 90 degree corners, it is unsuitable if there is any variation in angle. Our flexible corner bead allows you to reinforce angles that are not 90 degrees. The corner bead comes in long 25-metre strips, and when cut to size, helps provide the additional strength in areas that tend to encounter more knocks than average.

The bead is to only be used with thin coat systems and is fully embedded within the basecoat render system, so once installed no beading will be visible.

EWI-63331 Bellcast Bead – 2.5m

Our bellcast bead is only used in render-only systems, it is mesh free and is available in two variations – 6mm or 10mm. 6mm is used for thin coat render systems, while the 10mm is used for scratch renders.

The bellcast bead is embedded within the basecoat layer at the bottom of the wall where you want the render to finish (normally above the DPC level). The bellcast allows you to generate a nice straight finish at the bottom of the render, but also it serves an important secondary function. The bellcast bead provides a protruding lip that directs water away from the wall – this lip means water cannot run back along the bead to the wall helping to prevent damp forming.

EWI-66458 Reveal Bead – 2.5m

The reveal bead is used around windows to help provide a tidier finish. It also means that silicone is not required. The bead is used on vertical reveals, as well as the top reveal, and can be used on EWI systems (where the mesh is tied into the reveal using the basecoat adhesive) or the mesh can be cut and used on render-only systems.

The reveal bead has a removable tab, so once the final top coat has been applied, you can simply remove the tab, leaving a nice crisp clean finish.

This reveal bead is available in either white or grey (to match windows finished with RAL-7016). This reveal bead comes with a ‘O’ ring of rubber which sits on the window frame and compresses to give a waterproof seal when the bead is installed correctly.


EWI-66470 Reveal Bead (with sponge) – 2.5m

This reveal bead is very like EWI-66458, although instead of using the compressible rubber ‘O’ ring, it uses a sponge to provide the seal. This reveal bead is only available in white.

reveal bead ewi-pro-beading

EWI-66485 Window Header Bead (with drip) – 2.5m

This bead resembles EWI-66520 corner bead, however when you look closely there is a drip on the bead. This bead is used in EWI systems, and prevents water travelling back along the reveal at the top of window frames. The drip on the bead ensures that water travelling vertically down the wall towards a window will then be forced to drip down onto the window sill.

The bead has two mesh wings, which are embedded into the basecoat layer – ensure that you install the bead in the correct orientation as per the picture below.

EWI-64410 Aluminium Starter Track – 2.5m

This is our basic starter track and forms a stable plinth on which you can build up the EWI systems. The aluminium starter track is available in a few different thicknesses as standard – 50mm, 70mm, 90mm and 100mm however other sizes are available to accommodate other thicknesses of insulation but these are made to order (expect a delay of 5 working days if wanting to order bespoke products).

The aluminium starter track is attached to the wall at 300mm centres using screws and rawl plugs. We recommend connecting aluminium starter track to adjacent pieces using starter track connectors to help increase strength.

EWI-64650 Clip on Profile – 2.5m

This particular bead is normally bought in conjunction with the aluminium starter track. It is the mechanism with which the aluminium starter track is tied into the external wall insulation System. ­­­­­The bead clips on to the front edge of the aluminium starter track and then is embedded within the basecoat layer of the EWI system.

EWI-64206 (+ EWI-64216) – Premium Starter Track

Our Premium Starter Track is made from high strength uPVC. It consists of two parts – a female part that is attached to the wall using screws/rawlplugs at 300mm centres, and a male part.

The male part of the premium starter track slides into the female part of the starter track. The reason there are two different product numbers is that this starter track is designed to work with a range of different insulation thicknesses.

EWI-64206 is used for EPS thicknesses between 50-90mm

EWI-64216 is used for EPS thicknesses between 100 – 160mm

The premium starter track does not require the additional clip-on profile, since there is already a mesh wing connected to the leading edge of the male part of the starter track – and it is this that is that gets embedded within the basecoat layer of the EWI system.

EWI-66500 Flexible uPVC Arch Bead – 2.5m

Flexible uPVC arch bead is used to form perfect arches, either internally or externally. The bead sits within the basecoat layer and provides sharp clean edges as well supporting the angles against accidental impacts.

The flexible arch bead has been constructed to allow it to match the contours of the arch, but also to provide additional strength.

Once the bead has been embedded within the thin coat render system it is no longer visible.

EWI-66417 Stop Bead – 2.5m

Our stop bead is used at the edges of our thin coat render systems to get a clean sharp finish. It comes with a 100mm wing of mesh that gets embedded into the basecoat layer. Stop bead can be used in several situations – including providing a stop to the render at window and door frames and at changes to the facade to produce a straight finish. The stop bead also helps provide some protection against impact.

For more information on the different types of beading available, please visit our sister site

Silicone Render

What is Silicone Render?

There are many different types of render on the market, all with different properties. The range includes older sand-cement style renders, to scratch renders, and thin coat renders. Silicone Render is a ‘thin coat render’, which means that it is applied on top of a basecoat at just a few millimetres thick. Silicone is becoming ever more popular these days, so in today’s blog post we’re going to explaining a little bit about it.

Why choose Silicone Render?

There are many big advantages to using silicone. There really is little competition when it comes to quality of finish. Let’s take a look at some of the major advantages:

  • Silicone is breathable – Where cement and acrylic renders completely seal off the wall and prevent it from breathing, silicone is very breathable.
  • Silicone is self coloured – Unlike other renders that must be painted after curing, silicone has the colour mixed into it, meaning just one coat and the job is done. Having the render pre-coloured means that it lasts longer and won’t show if it is scratched, as the colour runs through the whole top-coat. (for an idea of the cost of silicone render per square metre, read our dedicated blog post here)
  • Silicone is easy to apply – Where other renders have a painting stage, thin coats can be done in just a few hours on a properly prepared wall. Despite a slightly higher cost, your job will be done in much less time than a traditional render.
  • Above all else, silicone looks great! It leaves the property looking like a new house.

How is it applied?

Silicone is a one-application thin coat render. It is dead easy for a qualified renderer to apply this render to a fully prepared wall. On a typical wall, a basecoat should be applied to create a strong, stable and level surface with which to render. Once the base coat has dried, the silicone can be applied using a plastic float to create a thin and smooth finish.The thickness of the silicone top coat should be the same as the grain size of the render. So a 1.5mm Silicone Render will be 1.5mm thick on the wall. The layer has to be applied in one go on each elevation otherwise you could end up with patches and lines where the render has been joined.

What does Silicone Render cost?

Silicone Render is slightly more expensive than Acrylic Render, but the extra cost is really worth it because you get a much better performance. You can find our current prices on the website, but you may be surprised at how inexpensive it works out once you have factored in the savings you will make with a thin coat render.

How much thin coat render do you need for a typical house?

This is going to come down to the area of wall you are looking to cover. The render comes in 25kg pre-mixed buckets, and each bucket at our standard 1.5mm finish will cover around 8 square metres of wall. For an average semi-detached house of say, 80m, you are looking at around 10 buckets of render. If you go for a finer grain size of 1mm, the render will go further, covering 11-12m of wall each. Thicker 2mm render will cover less area, so you need to take this into account when you are working out the quantities you need.

Who makes Silicone Render?

There are several brands available on the market, but we recommend EWI Pro Silicone and Silicone Silicate render. They are well priced and offer all of the advantages we have mentioned above. Plus we offer colour tinting and next say delivery on this product.

Where can I purchase Silicone Render?

You can buy our EWI Pro Silicone Render via our store – just click on the item below AND as a little thank you for visiting our website, simply use the code ‘SiliconeR’ at checkout to get a 15% discount to Silicone Render applied to your basket.

Can I get Silicone Render in cream, grey and magnolia?

The great thing about EWI Pro Silicone Render is that there is a huge range of colours available to choose from. You can order a free colour chart, pick your colour and this will be mixed up and sent out to you the next day in most cases, using our own delivery drivers, not couriers.

You can buy EWI Pro Silicone Render online, in store or by giving us a call. For any further questions, we are always happy to help so leave a comment down below!

Looking for an approved renderer in your area? Fill out the form below and we will be in touch!

Approved Installers Request Form

Your Name*

Your Email*

Your Number*

Your Postcode

Additional Information

I would like to receive news and offers from EWI Store

Rendering your home mesh

Rendering your home

Our EWI Pro external wall insulation system is made up of a combination of adhesives, insulation materials, coloured renders and paints, but for many people they just want to give their home a facelift rather than go the full hog and insulate the house at the same time. The good news is that when rendering your home, very few products are needed and also the process itself is very simple!

What materials are needed when rendering your home?

There are 6 basic products that you need to render your home (although you may not need the levelling mortar depending on the state of the wall):

1. Levelling Mortar (EWI-260)
2. Substrate Primer (EWI-310)
3. Basecoat Adhesive (EWI-220)
4. Fibreglass Mesh (EWI-66640)
5. Render Primer (EWI-333)
6. Render Topcoat (EWI-040)

Preparing the wall prior to installing render

There are two ways in which you can prepare the wall – we would always recommend using primer, which we will cover in a moment, but you can also use levelling mortar if necessary.

Levelling Mortar (Optional)

The purpose of the levelling mortar is pretty much what it says on the tin – it is used to level out the wall before applying the basecoat and render layers to the system.

Our levelling mortar can be used on cracks up to 50mm. It comes in a 25kg bag and is a dry mix. Each 25kg bag of levelling mortar needs to be mixed with 6 litres of water prior to using it. It can be applied with standard trowel, and the great thing about it is that even when it dries, shrinking is only minimal so it keeps it shape in the filled cracks. We recommend using the levelling mortar over the whole surface when using our render systems over pebble dash.

Normal coverage is approximately 4m2 per bag when it is applied to a depth of 6mm, but obviously, coverage will vary dramatically from job to job.

Applying substrate primer before rendering your home

The substrate primer is used first to fulfil 3 roles:

1. Stabilise the substrate
2. Reduce the rate of absorption of the substrate
3. Allow the basecoat to key into it

Our substrate primer is known as Universal Primer (EWI-310) and comes in 20kg buckets. It is applied to the wall surface using either a brush or a roller and helps stabilise the substrate. We would always recommend using a wire brush to help remove any organic or loose debris before applying the primer, but even if this step is ignored, the primer will help solidify any loose debris left on the wall.

When the basecoat adhesive is applied to the wall, it goes on as a wet mortar. Another purpose of the primer is to stop all the moisture from the adhesive being drawn into the wall. The issue is that the adhesive will go off to quickly if the primer is not used, which is okay if you work quickly, but we know that most renders want a bit of time to get the basecoat layer nice and flat.

The final purpose of our universal primer is to allow the basecoat to key into the wall. The primer has silicate (essentially sand) particles which give the surface of the primer a bit of texture when it dries. This allows the basecoat adhesive to key into the primer and form a stronger bond with the wall. This is particularly important if the primer is being applied to a very smooth wall.

Once the wall has been primed (and is hopefully now level if the levelling mortar was required) it is time to add the basecoat layer.

Adding a basecoat layer

The basecoat layer is the most important layer when you are rendering your home. This consists of a 6mm layer of basecoat adhesive with an embedded fibreglass mesh. The EWI-220 Basecoat Adhesive is applied to the wall using a notched trowel and then strips of fibreglass mesh are embedded into it.

The basecoat adhesive comes as a dry mix in 25kg bags. 6 litres of cold water needs to be added to this before it can be applied to the wall. It needs to be mixed with a paddle mix until a smooth paste forms and this needs to be left for 10 minutes before another quick mix is done prior to applying it to the wall.

The fibreglass mesh comes in 50m rolls and is 1m wide. Each strip needs to overlap the previous strip by 100mm and we recommend installing the strips vertically down the wall. While the adhesive is still wet, gently press each strip into the adhesive, and then turning the notched trowel over draw the flat edge up over mesh – this will embed the mesh into the adhesive by drawing adhesive through gaps in the mesh.

This layer needs to be completely flat before applying the top coat render as the render layer will only be 1.5mm thick; therefore any bumps and lumps in the basecoat layer will be visible within the render if they are not taken out!

We mentioned previously that the basecoat layer is just about the most important part of our render only system – and the reason for this is all due to flexibility. Our render systems don’t crack – this basecoat layer moves with the building and together with the flexible top coat it offers an incredibly durable system once installed on your home.

Priming the basecoat

Before rendering, the basecoat needs to be primed. The type of primer should match the render you will be using. The primer is applied with a brush or roller once the basecoat has dried completely.


The final stage! Your chosen type and colour of render is applied to the wall with a trowel and then textured using a plastic float. The result is a fresh new look for your property, and a protective coat against weather damage.

Approved Render Installers

Here at EWI Store, we have a database of installers who have passed our training sessions and have subsequently become approved installers. What this means is that once they are trained in the correct use of our materials and have proven themselves to provide the highest quality of work, we recommend them to our customers.

If you are interested in finding a local approved installer, simply fill out the contact form below and we will be in touch!


Approved Installers Request Form

Your Name*

Your Email*

Your Number*

Your Postcode

Additional Information

I would like to receive news and offers from EWI Store