WPS Rendering Contractors Ltd

External Wall Insulation and Rendering Systems in the East Midlands


Keep up to date with our latest news and information

  • 19/01/2022 - WPS Plastering Contractors Ltd 0 Comments
    Building Regulations and External Wall Insulation

    Under Building Regulations, if 25 per cent or more of a wall is to be insulated externally, it is typically necessary to bring the entire wall up to current standards — which makes sense in that, if you’re going to go to the efforts and expense of insulating externally, then you may as well do it well. The thermal performance of the insulated wall must have a U value of no more than 0.30.

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  • 12/01/2022 - WPS Plastering Contractors Ltd 0 Comments
    Can External Wall Insulation Cause damp?

    There is potential for moisture to enter a wall from both sides: rain on the external skin and moisture from people and the activities they undertake (cooking, drying clothes, washing, breathing, etc.) on the internal skin.

    Prior to the widespread introduction of the cavity wall, the housebuilder generally had a choice. To build a solid brick wall that is  impermeable and stops moisture penetration to both surfaces, or to build a stone wall which is a breathable wall that allows moisture to penetrate (to a degree) and be evaporated away.

    In comparison the cavity wall is an impermeable wall in that the cavity is intended to form a ‘barrier’ to prevent moisture penetration; any rainwater entering the wall is evaporated away by the air movement in the cavity.

    When adding modern insulation materials these are usually non-permeable so need to be rendered or clad to prevent the weather penetrating through.  However, this does not stop moisture from inside reaching the walls and causing issues.  It may mean further ventilation is required to reduce the moisture getting to the walls.

    To explain further the dew point (where air meets a temperature that turns moisture to water) is moved further away from the internal walls when external insulation is fitted.  

    The effect the insulation has is to warm the wall moving the dew point further out and therefore reducing the risk of condensation on the internal walls.

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  • 05/01/2022 - WPS Plastering Contractors Ltd 0 Comments
    What is The Best Insulation Method To use?

    Should you choose internal or external wall insulation when deciding to insulate your home?

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  • 16/08/2021 - WPS Plastering Contractors Ltd 0 Comments
    Keeping You Warm in Winter and Cool in Summer

    Having a well insulated home is great in the winter months as you know the heat can not escape as quickly through those walls, however, what do you do in the summer when you want that heat to get out.  This video explains how you can keep warm in the winter and cool in the summer especially after having External Wall Insulation installed on your home.

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  • Panning Permission for External Wall Insulation and Render
    16/08/2021 - WPS Plastering Contractors Ltd 0 Comments
    Do I Need Planning Permission for Rendering or External Wall Insulation?

    This short video explains whether you need planning permission to have render or External Wall Insulation on your home.  The answer is not always so straight forward.

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  • Different Types of Render Systems
    28/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    Different Types of Render Systems

    When asking for a rendering system to be installed on the walls of your home, there will be some choices to be made.  The first is the type of rendering system you will want.  This short guide will help you understand the different rendering systems on the market to help you make the right choice for your home.

    Monocouche Renders

    Monocouche or scratch renders are a decorative cement based render that is pre-bagged and pre-coloured. Scratch render refers to the technique used to apply the render whereby it is applied on around 18mm thick and is then scratched back to create the overall finish of around 15mm. The term monocouche is a term to describe modern renders and differentiate it from the traditional render of sand and cement. Monocouche is actually a manufacturers name however the industry refers to most of these as monocouche or K-Rend. There are around 12-24 colours available to choose from depending on the manufacturer used.

    Thin Coat Renders

    This is a wide category whereby the render is applied in multiple layers but the overall thickness is thinner than that of traditional or scratch renders.  Typically these renders can be applied to a thickness of 6mm or above.  Depending on the surface the render is being applied to we will complete the following steps;

    1. Preparation of the walls - pre-wash or applying a cement or insulation board
    2. Basecoat - apply a basecoat which is reinforced by embedding an alkaline mesh to not only strengthen the render but to help to prevent cracking of the render.
    3. Finish - a decorative finish is applied. There are a number of finishes available including the following;

    Dash - This is a system where dry aggregates are thrown onto wet render to create the finish. There are a number of colours and different sized aggregates that can be used and can a cheaper option than other finishes.

    Silicone - .A high performance through coloured render finish which contains silicone in the pre-mixed pre-coloured bucket. The silicone gives this product a stain and water resistant covering and helps to repel pollutants, alage and staining from sticking the coating. In the unlikely event a stain does occur the rain should remove this but  otherwise a minimal maintenance maybe required to remove this. This is lightweight product which is flexible and can withstand slight movements from a building without cracking.  This finish is breathable and ideal to be used on insulation or cement boards and for buildings that require a breathable system. Silicone has two textures
    available one in a textured finish or a rolled corrugated finish and is available in almost any colour on the market as all buckets are coloured to order.

    Acyrlic - A high performance through coloured finish which contains acrylic resin (a type of plastic) and is pre-coloured. It offers a stain and water resistant covering
    which also helps to prevent cracking. However, this does have its limitations from the Silicone finish. Due to the plastics it is unable to allow a building to breathe and therefore can not be applied if the building or the insulation needs to be breathe. It can not be applied in cold or wet conditions as it takes longer to dry. Unlike the silicone finish it will require maintenance as it is not as resistant to pollutants and algae in the same way as the Silicone finish. This is also available in two finishes, textured or rolled/corrugated and is available in a wide choice of colours.

    Brick Slips - Where a client wants their house to be rendered but would like a more traditional finish, brick slips can be applied as a finish coat. These are either extruded from bricks or are synthetically made. There are a wide choice of colours and textures on the market from most manufacturers, however we do work with some manufacturers who now offer a brick matching service creating authentic looking bricks. These are stuck on and then pointed afterwards.

    Brick Effect Render - A slightly cheaper option for a brick finish is to use brick effect render. In essence the mortar coat is applied first to the surface and then the brick coat
    is applied on top, before this brick coat dries it is scored to create the bricks and to exposure the mortar coat underneath. There are a number of colours available but are monotone in their appearance compared to brick slips. This is a lightweight system allowing it to be applied on top of cement boards and insulation.

    Stone Effect Render - These are popular when wanting to create or re-create a stone feature or even a full house to look like stone. As its lightweight it can be applied onto insulation and has the same properties as the brick effect render.

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  • 10 Benefits of External Wall Insulation
    26/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    10 Benefits of Having External Wall Insulation

    Deciding to have External Wall Insulation fitted is a big decision as the installation costs can seem quite high.  This quick guide provides the top 10 benefits of having External Wall Insulation fitted in your home.

    1.  Reduces your energy bills by up to 40%

    The insulation acts like a barrier stopping the heat from your home escaping to the outside and heating the air and not you. The original walls of your building will act like a storage heater so that the heat is sent back into your home and will keep you warmer for longer. This in turn will ensure your heating is not as long as it is now which can mean up to a 40% decrease in your energy bills.

    When asking some previous clients about their energy consumption they said that they have had to turn the boiler temperature down, make sure the thermostats on the radiators are working and have had the heating on for less throughout the day. Most have said they have seen a 40% decrease in their energy bills which can amount to around £455 per year.

    2.  Reduces damp and condensation

    Condensation occurs when hot air comes into contact with cold walls. By placing the insulation on the outside of your home, it moves the point where the cold air
    meets the warm outside of the house. Therefore, this vastly reduces the problem of condensation within a room and home. In turn this also improves the indoor air quality.

    3.  Living spaces become more comfortable

    When losing heat through the walls it causes damp which in turn leads to paints and plaster from degrading, wallpaper peeling off and potentially the development of mould. Unfortunately, in some instances where damp is found within a home it can contribute to respiratory problems. Having a properly insulated homes reduces these
    effects and improves your family’s health.

    4.  Keeping your home warmer in the winter and cooler in the summer

    By having insulation on the outside of your home it not only ensures that your home stays warmer in the winter, but also protects it from gaining too much heat in the summer. External Wall Insulation ensures that the heat produced by your heating system remains within the building, while also stopping the cold air getting in. In the summer months the reverse is true. The walls can not absorb the heat from the sun so it keeps the heat out.

    5.  Saves on floor space as the insulation is placed on the outside of the building

    One of the benefits from having External Wall Insulation fitted is the fact that no floor space inside your home is reduced as all the thickness is on the outside. By placing the insulation on the outside it is like adding a big puffer jacket to your home keeping you warm in those cold winter months.

    6.  Low disruption whilst the works are being completed

    Disruption to you and your home whilst the insulation is installed is minimised and can be quicker than other insulation methods. As a team we will be working on the outside of your home insulating and adding the finish coats, allowing you to continue with your family life with minimal disruption.

    7.  Reduces your homes carbon footprint

    Following the installation of External Wall Insulation you will notice that your heating is not on as long which in turn will reduce your carbon footprint on the environment.

    8.  Reduces noise levels from the outside

    Noise pollution penetrating into your home can be bad for your mental health and wellbeing. External Wall Insulation, insulates your home and can reduce the noise from the outside being heard inside.

    9.  Protects the walls of your home to increase its lifespan

    External Wall Insulation protects your home from the weather by protecting it from damage from what the UK weather can produce. 

    10.  Changes the appearance of your home giving you that Grand Design feel

    External Wall Insulation provides a number of finishes that you can choose from including coloured finishes, brick and stone effects.

    For more information or to ask for a free quote please call 01636 358827.

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  • 12/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    ​Can I externally insulate some walls of my home and not others?

    Can I externally insulate some walls of my home and not others?

    The answer to this is you should insulate all your home.

    If your homes is made of single brick (i.e. no cavities) then it is highly recommended by the Energy Savings Trust and OfGem to insulate all walls.

    If your home is combination of single brick and cavity wall then it states that the external insulation needs to be placed on the single brick walls and to ensure that the cavity is either filled or blocked and external wall insulation installed instead.

    What happens if I don’t Insulate All Walls?

    By not insulating all the walls on a home, you are not getting the full benefit of having External Wall Insulation installed on your home. The insulated walls though will
    work they will not work as effectively.  The heat from your home will take the path of least resistance in escaping so will use the uninsulated walls to escape.

    As the cold and the warm air meet this can create moisture problems like mould and damp. In addition, where the insulated wall meets an uninsulated wall, the moisture problems will be more prevalent causing mould and damp on the internal corners of your rooms internally.

    Insulating All Walls

    By insulating all your walls whether this is all externally, internally, cavity or a hybrid of these then this will give you as a homeowner the most effective and efficient way of keeping your home warm and ultimately reducing your heating bills. From our past customers this has been as much as 40%.

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  • How Do I Change the Look of My Bungalow?
    06/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    How Do I Change the Look of My Bungalow

    Can you change the look and feel of a bungalow by using render?  The simple answer to this is yes of course you can.

    Coloured render systems offer homeowners the opportunity to update the look and feel of their bungalow without the ongoing maintenance costs involved in other types of renders on the market.  Renders also provide a weather protection to your home especially where bricks are not working as efficiently as they could.

    Where you have no cavity in your walls and only classed as a single brick property this is the ideal opportunity to add external insulation to the outside walls prior to rendering them to reduce heat loss from your bungalow.

    Lastly, renders give curb appeal and can ensure your home stands out for all the right reasons on the street.

    Our gallery of projects that we have completed are a combination of different types of renders;

    1.  Monocouche or K-Rend - these renders are through coloured renders and are great way of providing a lovely finish to your home.  The choice of colours is slightly limited but most clients can easily choose from the colour range on offer. 

    2.  Silicone Renders - these renders can go on slightly thinner than the monocouche render but these are more flexible renders which allows the building to move slightly and cracking is reduced.  The colour range on these is endless which allows you as a client to really define the colour you would like.

    3.  Insulated Render Systems - also known as External Wall Insulation - these renders insulate your bungalow on the outside prior to applying a silicone render over the top.  These are ideal where you only have a single brick between your home and the outside world.

    Whatever you choose these systems are ideal for existing homes as well as new builds.

    Why not call to find out what we can offer in more detail on 01636 358827

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  • How is External Wall Insulation Installed?
    04/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    How is External Wall Insulation Installed?

    How is External Wall Insulation Installed? This is a question we are asked by most of our clients as they want to understand how this is going to impact their daily

    life whilst the installation is taking place.

    1.  Firstly, we will be preparing the areas that are to be insulated. This includes the covering down of windows and doors, adjourning areas that are not be insulated/rendered and starting to apply the beads required prior to the insulation being installed. At this stage the scaffolding will be erected if that hasn’t already been done prior to us starting and we will also receive the delivery of materials required.

    2.  The insulation boards are stuck onto all the walls that require the insulation.

    3.  The insulation boards are mechanically fixed back to the boards. When this is to happen we advice all our customers to remove all valuable and sentimental items away from walls or shelves that could be damaged from vibration from the drilling that will take place. We also advice that if possible that you pop out as it can be very noisy whilst this is being completed.

    4.  All other beads required for the project are applied to the areas required.

    5.  The basecoat is applied with a mesh embedded in. The mesh gives the strength to the system.

    6.  A further basecoat is applied.

    7.  For coloured render finishes a primer is applied prior to the final colour being applied.

    8.  For brick slips the slips are applied onto a frame prior to the mortar joints being added.

    9.  Finally we complete a clean up, remove all coverings from windows and doors.

    It seems a few simple steps but of course the length of time that this takes will depend on the amount of work required. At each stage a day maybe required for walls
    to dry prior to the next stage being applied.

    So how is External Wall Insulation applied? In multiple stages.

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  • Which Insulation is best to use on the outside of my home?
    02/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    Which Insulation is best to use on the outside of my home?

    There are different insulations to use on the outside of your home, which one is best?

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  • 02/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    How to Choose a Colour for Your Home

    Choosing the right render is daunting, here are some helpful hints and tips to help with choosing that colour.

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  • How Can I make My Home Warmer?
    01/04/2021 - WPS Plastering Contractors Ltd 0 Comments
    How Can I make My Home Warmer?

    The Problem

    Most homes built before 1950 are of single brick construction and are extremely inefficient in keeping the homes warm.  It is estimated that around 35% of the heat is lost through these walls to the outside world making heating your home very costly.

    The Solution

    By placing insulation on the outside of your home its like adding a thick blanket around the home which will keep the heat inside and the cold out.  The insulation works by allowing the heat from the home to heat the bricks (the original part of the home) as well as the inside and then for that heat to be transferred back into the home and not outside into the world.

    The insulation is made of either mineral fibre, or EPS (expanded polystyrene insulation) which stops the heat from escaping and keeping it in the home.  Most clients we have had have stated that they have saved on average 40% on their heating bills and even having to learn how to use thermostats, radiator valves and timers as they don't need the heating on all day everyday.

    Installing External Wall Insulation can be quite costly and you will need to look at the potential savings each year versus the upfront cost, however, the benefit of having it is that you and your family are warmer in a home that you love.

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  • Can I still insulate my home now that the Green Homes Grant has been Axed?
    28/03/2021 - WPS Plastering Contractors Ltd 0 Comments
    Can I still insulate my home now that the Green Homes Grant has been Axed?

    ON 31 March 2021 the UK Government's Green Homes Grant Comes to an End

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  • Top 10 Tips for Installing External Wall Insulation
    14/03/2019 - WPS Plastering Contractors Ltd 0 Comments
    Top 10 Tips for Installing External Wall Insulation

    Clearly, external wall insulation (EWI) has many positives; however, the fruits of these benefits are often overshadowed by EWI’s myths and misconceptions. To remove

    any grey areas, here are our top 10 tips.

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