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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
How To Successfully Install A Concrete Shed Base
01st June 2020

Whether it’s for storing tools and gardening equipment or to turn into something a little more fun, a shed is a fantastic addition to any garden. So, if you’re looking to add a shed to your outside space, you’ll need to make sure it has a solid foundation to ensure its longevity and durability which is why we’ve put together this quick guide to installing the perfect concrete shed base.

1) Where will your shed go?

The first thing you’ll need to decide for a successful concrete shed base is where you want the structure to go in your garden. If it’s placed too near a wall it will be difficult to apply your wood treatment and finish and it might restrict your access. Don’t forget if it’s too close to a tree or large plant, the roots may affect the stability of the shed base.

2) Preparing the sub base

Once you’ve decided on your perfect location, it’s time to prepare the ground by:

  • Digging the top layer of soil down to at least a 3 inch depth
  • Constructing a wooden framework that runs the perimeter of the shed base and sit approximately 3 inches above garden level
  • Laying around 3 inches of compacted hardcore (brick rubble is also suitable) and if appropriate, compacted sand.

3) Pouring the concrete

Now you have prepared the ground, all you have to do is sit back and relax as the experts at Wright Minimix prepare the perfect concrete mix for you and deliver it straight to your home. By choosing ready mix concrete, you ensure the concrete you use for your shed base is correct, you order the exact amount you need to reduce waste and ensure you only pay for what you need.


To find out more about Wright Minimix’s DIY concrete manufacturing and delivery, please don’t hesitate to get in touch today on 0117 958 2090

Read more
What is reinforced concrete?
19th May 2020

Reinforced concrete is concrete that has steel bars embedded within it. The two materials then act harmoniously to absorb the tensile, compressive and shear forces acting upon it.

Why is concrete reinforcement necessary?

Solid concrete has incredibly high compressive strength. This means that it can cope with large amounts of pressure applied to its surface without breaking. In comparison, concrete’s tensile strength is usually less than 10% of its compressive strength, which makes it vulnerable to forces that could pull it apart, like earthquakes, vibrations and high winds. Steel rebar absorbs tensile stress applied to the concrete and significantly increases its ability to withstand it.

How does concrete reinforcement work? 

When embedded within concrete, steel bars, rods or mesh form a strong bond with the mix as it cures to create what is essentially a single structure. The steel is arranged in such a way to ensure maximum effectiveness in overcoming tensile forces, whilst the concrete makes up for the compressive strength that the steel bar lacks.

Do I need reinforced concrete for my project?

One question that we get asked frequently is if they will require a reinforced concrete slab for their project. Generally, reinforced concrete is recommended for all commercial applications. For DIY projects, it depends on both how large the concrete slab will be and its intended use. If you want to erect a small wooden shed, it shouldn’t be necessary, though you may want to consider steel reinforcement for a large driveway to avoid cracking.


We are proud to be your one stop shop for all things concrete in Bristol, South Wales and the surrounding areas. Whether you are working on a commercial contract or a job in the garden, we can deliver quality concrete mixes straight to you on site. We can even arrange steel reinforcement on your behalf as well. Call us today on 0117 958 2090.

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Why liquid screed trumps dry screed indoors
17th April 2020

At Wright Minimix, our concreting experts maintain that liquid screed is far better than traditional dry screeds when it comes to indoor applications. Read on to find out why.

Speed of installation

Liquid screed will always be faster to install than dry screed. This is because it requires zero spreading or levelling. All you need is a concrete pump and a very limited number of tools to carry out installation. The larger the area you need to cover, the more time (and therefore cost) savings you will make by using liquid screed over a traditional dry screed.

Drying times

Our Wrightflow liquid screed has been specially designed to be quick drying whilst maintaining minimal chance of cracking. This means that your floor could be walked on within 24 hours and is usually capable of full weight bearing within 7 days. This is more rapid than the majority of traditional screeds.

Efficiency with underfloor heating

One of the most compelling reasons to choose liquid screed over a traditional dry screed is its improved thermal efficiency when combined with underfloor heating. This is because liquid screed wraps around the underfloor heating pipes completely and has minimal air pockets that prevents heat distribution throughout the floor. Better thermal efficiency means that you will have to spend less overall on other heating costs to compensate, like turning on radiators.


At Wright Minimix, we have created our own brand of Wrightflow liquid screed to ensure you get the best possible results. To find out more and arrange a quote, contact our team today on 0117 958 2090.

Read more
Concrete Curing – How To Do It & What To Avoid
07th April 2020

Why is curing concrete correctly important?

Curing (or drying time) is a very important stage during installation, as this is when concrete develops its strength and durability through hydration. However, curing concrete correctly is a delicate process and means controlling the amount and rate of moisture that is lost through evaporation to ensure optimal results. 

For example, a well-mixed batch of concrete can be made weaker by poor curing, whilst an average slump that is well cured can produce better durability. It is therefore extremely important for the longevity of your concrete that you follow the correct procedure when curing freshly laid concrete.

Do’s & Dont’s of curing concrete

 

Do's

 

Water Curing

The first 7-10 days are essential in the curing process, as this is when the concrete will increase in strength the most. During this period, it is essential that your concrete slab does not dry out, especially if it is in direct sunlight. Misting is a technique frequently used and involves spraying a fine mist of water regularly across the surface of the slab to maintain moisture levels and keep the surface damp at all times.

Cover your slab

If it is not realistic for you to employ the misting technique frequently, then covering your concrete slab with a plastic sheet is the most efficient way to prevent surface water from evaporating. When covering your concrete slab, make sure that the sheet extends beyond the edges of the slab by at least double the depth of the slab. Use bricks, rocks or other heavy items to hold the sheet in place. Remove the sheet daily, wet the concrete, and repeat for at least 7 days.

Don'ts:

Let your concrete get too hot or cold

The ideal temperature to pour concrete is between 10-15°C. If your freshly laid concrete becomes too cold, then the chemical reactions will also slow down. Your concrete therefore won’t gain strength as quickly (if at all if it’s very cold). Concrete insulating blankets should then be used for the first 2-3 days to avoid damage. If you expect the temperature to be higher than 23°C, it is especially important to ensure that that slab does not dry out too fast – keep it hydrated!

Put too much weight on it too soon

Wait at least 24 hours before allowing light foot traffic on your concrete slab and at least 10 days before heavy traffic, like cars, machinery and heavy furniture.


To arrange your competitive quotation for the best ready mix concrete in the South and South Wales, contact Wright Minimix today on 0117 958 2090 and we’ll be happy to help.

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