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How to prepare your floor for liquid screed

Preparing liquid screed

 

As established concrete experts based in Bristol, Newport and Cheddar, we are ideally positioned to provide guidance on the best way to prepare for liquid screed.

Our Wrightflow Liquid screed flooring is designed to withstand even the most testing conditions and is ideal for customers looking to utilise their underfloor heating and save on their energy bills. The combination of materials, anti-crack and anti-shrink agents used in our liquid screed ensures you are left with only the highest quality concrete flooring and long-lasting results with a range of benefits.

However, this all relies on you undertaking the correct preparation work first. Find out how you can best prepare your site for liquid screed below or contact our team with any queries on 0117 9589 2090.

How to prepare your floor for liquid screed

 
  • Remove any debris from the sub floor.
  • Place insulation in 2 layers. Using dried sand to fill the void around pipes and ensure that this is level before installing the second layer of insulation board.
  • A membrane of 1000 gauge or thicker should be laid immediately under the pipework (above the insulation board) as a slip layer, and to prevent leakage of the screed before setting.
  • Install an edging strip around the edges and corners of the wall and attach securely.
  • Any shuttering across doorways or steps should be fully sealed with expanding foam or mastic to prevent leakage after laying but before setting. Pipe ducts or holes through walls also need to be sealed before placement of the liquid screed.

Wright Minimix - Liquid Screed

Wright Minimix - Liquid Screed

If you are installing liquid screed with underfloor heating

 
  • Install underfloor heating pipes and ensure that they are clipped every 400mm and more around bends. Make sure that the system is full of water prior to the liquid screed being laid. This avoids the pipework floating to the surface of the screed.
  • If you are using an ‘eggbox’ type pipe system, the membrane should be laid under the eggbox, and you should avoid using small off-cuts of eggbox to avoid any possibility of floating.
  • The minimum cover above underfloor heating pipes is 30mm therefore minimum screed thickness is normally 50mm when using a 16mm UFH pipe.

Common mistakes to avoid when preparing for liquid screed

 

Measuring the space incorrectly

Often sub-floor slope or unevenness may cause unexpected differences in the overall floor level and in the quantity of screed required. It is the customer’s responsibility to measure each room/area appropriately.

You will need to consider critical features such as door openings, minimum thicknesses/cover and required differentials in floor height between rooms. These must be agreed prior to installation and marked on the wall above the level of the finished screed so that they are present for comparison should a disagreement be raised about finished floor levels.

Any such disagreement must be brought to our attention within 48 hours of the screed being laid. Should these marks be removed or altered prior to any investigations then we will not be held accountable for any level issues.

Ordering less screed than required

Should extra liquid screed be required over that originally ordered and a separate delivery needed, the client will be charged extra costs,  so it is essential that a proper estimate is made by the client to avoid this.

Do you have any other questions about preparation for our liquid screed? Don’t hesitate to contact us and a member of our team will be glad to answer your queries on 0117 958 2090.

Do you have any liquid screed requirements? 
We are the right people for you – let’s work together! Contact us on 0117 958 2090 today to get a quote or to find out more.

News
3 Common mistakes to avoid when handling ready mix concrete
14th March 2019

A well-managed project is the key to success when it comes to concrete installation. Here are 3 common mistakes to avoid when handling ready mix concrete.

Not preparing the site in advance

One of the most common issues we encounter when delivering ready mix concrete is that the client has not prepared their site properly in advance before attempting to lay the concrete. 

A poorly compacted sub base will result in an uneven surface finish and an increased risk of weak points. Using gravel that is too small or too thin on the ground can also result in settling. It’s therefore incredibly important to ensure you've prepared your site properly prior to laying the concrete.

Not preparing the concrete mix correctly

This can be a big problem for those who choose to mix concrete themselves, either by hand or using a mixer. A good concrete mix is hard to achieve and involves finding the right balance between water, cement and aggregates. Too much water and the concrete mixture will be weakened, whilst too little will make it unworkable.

Ordering ready mix concrete from trained experts such as ourselves is a sure-fire way to ensure you receive a top-quality concrete mix for your project. Whatever type of concrete mix you need, a concreting specialist will be able to tailor a concrete mix to meet your specific requirements.

Poor concrete finishing work

Just because the concrete is laid doesn’t mean your job is done. Concrete finishing is an essential part of the process, whether you’re installing a concrete shed base or a concrete floor for a warehouse.

Compacting the concrete is important and will help ensure its strength and durability, whilst going over the surface of the concrete with a screed tool will also help ensure that the concrete is smooth and level.


If you need any further advice when it comes to installing ready mix concrete, our team of experts will be able to provide you with all the help and guidance you need. For quality ready mix concrete in the South West and South Wales, don’t hesitate to contact us today!
 

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Preparing your floor for liquid screed
07th March 2019

From insulating a floor to applying an edging strip, laying liquid screen requires preparation before installation. Our concrete specialists advise on how to prep your floor.

At Wright Minimix, we pride ourselves on the quality of our liqud screed flooring. It’s ideal for anyone facing heavy foot traffic and combines anti-crack and anti-shrink agents to leave only the highest quality flooring. Read on for how you can prepare your floor for liqud screed.

Consider underfloor heating

Underfloor heating pipes should be clipped every 400mm and more around bends. Fill your pipes full with water prior to the liqud screed being laid to avoid your underfloor heating floating to the surface of the screed. The minimum cover above underfloor heating pipes is 30mm.

Remove debris and place insulation

Before you begin laying any liqud screed floor, remove the debris from the sub floor and place your insulation in two layers for extra padding. Fill the void around the pipes with dried sand and ensure that it’s level before adding a second layer of insulation board to fill it out further.

Lay membrane

Above the insulation board, you then lay a membrane of 1000 gauge or thicker as a slip layer. As you’re going to lay the liqud screed later, you don’t want it seeping through to the sub floor and insulation layers, so the membrane will prevent any leakage.

Install edging strip

Next, an edging strip needs to be attached securely to the edges and corners of the room. Make sure that any shuttering across doorways and steps are fully sealed with expanding foam, again to prevent leakage, and seal pipe ducts or holes through walls, because these will need to be sealed against leakage too.


Our Wrightflow Liquid Screed has been tailor made by us to ensure maximum durability and effective heat insulation in your flooring. To find out more about our liqud screedcontact us on 0117 9582090.

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4 Ready mix concrete myths debunked
19th February 2019

Our experts discuss some of the biggest misconceptions that come with laying and finishing ready mix concrete.

With any kind of concrete comes myths about how to use it. Laying and finishing concrete can be tricky, so it’s important to address any misconceptions that you may have about it. Read on for the myths we hear the most often when it comes to ready mix concrete.

Concrete is impermeable


Water, either in liquid or vapour form, can pass through concrete. You can make concrete less permeable by using well-graded aggregate, though even the densest concrete can be porous. However, Surface treatments can help to make your concrete flooring impermeable; our experts would be happy to advise further on the matter.

It’s fine to lay concrete in any weather


The ratio of water to cement in your concrete is a fine balancing act. When it rains, naturally this adds more water than is necessary to your concrete mix, making it weaker. It’s best to lay concrete in mild, dry weather if possible; too much heat can also crack the concrete and result in a curing process that is too rapid.

Concrete will remain flat and level once it’s finished


Concrete will change in volume whilst setting, hardening and drying. This is why it’s important to get a professional finisher in to do the job for you; slab edges can curl when there’s a difference in moisture content and the temperature of the slab. Curling is less common though when you minimise temperature differentials.

Reinforced concrete won’t crack


Using steel to structurally reinforce your concrete can actually transfer the tensile stress from the concrete to the steel, however, reinforcement doesn’t prevent concrete from cracking. Minor cracks are usually nothing to worry about and are purely an aesthetic concern; hairline cracks are very difficult to avoid altogether, even for the most experienced concrete finishers!


To discuss our ready mix concrete prices in length, or to arrange quote, don’t hesitate to call us today on 0117 958 2090.

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Is ready mix cement the same as ready mix concrete?
04th February 2019

Although both terms are often used interchangeably, ready mix cement and ready mix concrete are not technically the same thing - cement being an ingredient in concrete.

We frequently find ourselves asked by clients for a batch of ‘ready mix cement’, when in fact they intended to request a batch of ready mix concrete instead. We are used to both terms being used and are unlikely to be confused by such a request, however, we are more than happy to clear up the confusion whenever it may occur.

How are cement and concrete different?

Simply put, cement is a basic ingredient in the finished product that is ready mix concrete and acts as a binding agent. In order to turn cement into a binding agent, you mix it with water to form a paste, which then acts to hold the aggregates together as the concrete sets.

Working out the correct water-cement ratio of a concrete mix is one of the most important steps in creating ready mix concrete, as this will determine the overall workability and strength of the finished concrete. Adding more water means that the concrete mix becomes easier to work but weaker overall, whilst adding too little water makes the concrete more difficult to work with.

Can I mix ready mix concrete myself?

Whilst hand mixing is possible, achieving the correct water-cement equilibrium can be a big challenge when mixing concrete, which is why so many people choose to employ experienced concrete contractors such as ourselves to do the hard work for them; it’s usually not worth risking a less effective concrete slab by attempting the complex task of mixing concrete yourself.

Working alongside a professional ready mix concrete supplier means that you are guaranteed to receive a batch of concrete that is tailor made to suit your specific requirements, with the correct water-cement ratio and any required additives.


To discuss our ready mix concrete prices in length, or to arrange quote, don’t hesitate to call us today on 0117 958 2090

Read more