Warning: Declaration of Dt_Custom_Walker_Page::start_lvl(&$output, $depth, $args) should be compatible with Walker_Page::start_lvl(&$output, $depth = 0, $args = Array) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/page_menu_class.php on line 14

Warning: Declaration of Dt_Custom_Walker_Page::end_lvl(&$output, $depth, $args) should be compatible with Walker_Page::end_lvl(&$output, $depth = 0, $args = Array) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/page_menu_class.php on line 95

Warning: Declaration of Dt_Custom_Walker_Page::start_el(&$output, $page, $depth, $args, $current_page) should be compatible with Walker_Page::start_el(&$output, $page, $depth = 0, $args = Array, $current_page = 0) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/page_menu_class.php on line 19

Warning: Declaration of Dt_Custom_Walker_Page::end_el(&$output, $page, $depth, $args) should be compatible with Walker_Page::end_el(&$output, $page, $depth = 0, $args = Array) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/page_menu_class.php on line 99

Warning: Declaration of Dt_Walker_Nav_Menu::start_lvl(&$output, $depth, $args) should be compatible with Walker_Nav_Menu::start_lvl(&$output, $depth = 0, $args = NULL) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/nav_menu_class.php on line 26

Warning: Declaration of Dt_Walker_Nav_Menu::end_lvl(&$output, $depth, $args) should be compatible with Walker_Nav_Menu::end_lvl(&$output, $depth = 0, $args = NULL) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/nav_menu_class.php on line 31

Warning: Declaration of Dt_Walker_Nav_Menu::start_el(&$output, $item, $depth, $args) should be compatible with Walker_Nav_Menu::start_el(&$output, $item, $depth = 0, $args = NULL, $id = 0) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/nav_menu_class.php on line 35

Warning: Declaration of Dt_Walker_Nav_Menu::end_el(&$output, $item, $depth, $args) should be compatible with Walker_Nav_Menu::end_el(&$output, $item, $depth = 0, $args = NULL) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/functions/core/menu/nav_menu_class.php on line 96

Warning: Declaration of DT_Widget_Walker_Category::start_el(&$output, $category, $depth, $args) should be compatible with Walker_Category::start_el(&$output, $category, $depth = 0, $args = Array, $id = 0) in /homepages/37/d875816132/htdocs/A Donnelly/public_html/wp-content/themes/dt-pressmate/widgets/categories.php on line 5
Liquid Screeds in Northern Ireland - A Donnelly Flooring

Liquid Flowing Floor Screed

Also Known as:

• Ultraflo (Hemihydrate floor screed)
• Gyvlon (Anhydrite floor screed)

Liquid Flowing screed can be used in both new build and renovation projects, it is suitable for domestic and commercial buildings and has been used in hospitals, schools, colleges, department stores, hotels and airport buildings.

Liquid floor screed continues to grow in popularity and is the market leader in most western European counties for many of the reasons listed below:

Quality Control

Liquid floor screed is pre mixed and the viscosity is checked prior to installation to ensure it is consistent and in line with the manufacturers installation guidelines. It is very difficult to put quality control measures in place with traditional screed as there can be wide variations during site installation. Ultraflo floor screed has extremely low shrinkage which reduces the risk of cracking and will not curl.


Flowing Floor Screed can be laid at lower depths than traditional screed, 25mm bonded, 40mm on to insulation and 50mm on to underfloor heating. The reduction in depth can result in liquid screed being a more competitive option than sand and cement, the reduction in depth also means that the screed is ready to receive floor finishes quicker than a traditional screed.Lower depths in screed will also make an under floor heating system more responsive during heat up and cool down.

Minimum depths

Fully Bonded 25mm
In contact with the substrate / Unbonded 30mm
Floating commercial 40mm
Floating domestic 35mm
Cover to conduits / underfloor heating pipes 25mm (Pipes are usually 16mm to total depth 41mm)


Liquid flowing screed can achieve a standard strength of C30N/mm2.
Floors do not require any reinforcement or fibres to add to their strength.


Liquid Flowing Floor Screed Health and Safety

Liquid Flowing Screed is Protein free and will not harbour bacteria.


Screed will be delivered in a large mixer truck and our installers will use a pump to lay the liquid floor. The flow rate is approximately 5 minutes per m3.
The surface of the screed will then be dappled with a T-bar, which will remove any air bubbles and produce a smooth surface for the final finish.
Immediately after installation, and until the screed has hardened, you will need to ensure the surface is protected from direct sunlight, water ingress, and severe draughts.
After 24hrs it is recommended that doors and windows are opened (in good weather) to assist with drying and the release of moisture


A four man team can install over 900m2 per day of liquid screed, compared to 150m2 of traditional screed.
You can walk on a liquid screed floor within 24-48 hours compared to 7 days for traditional sand cement.
Ultraflo screed will dry at a rate of 1mm per day up to a screed depth of 40mm if the drying conditions are good.


Installation requires preparation and should be made up with the following prior to screed being poured. DPM (damp proof membrane),Slab, Insulation, Vapour Barrier, and then the Floor Screed can be laid.
If underfloor heating is installed, the makeup of the floor should be as follows:
DPM, Slab, Insulation, Vapour Barrier, Underfloor Heating Loops, Floor Screed.
We can also install on upper floors where a beam and block construction, or concrete plank is used. Where this is the case, you will not need to install a DPM, However, the vapour barrier is still required. This is because the vapour barrier is required by the manufacturers of the insulation, to prevent contamination by floor screed. However, the vapour barrier also forms a separation layer to minimise cracking should movement occur below the screed.
You will need to ensure the Vapour barrier does not have creases, as this could result cracking of the screed
Edge insulation, (perimeter strip) should be placed around all walls to separate the floor screed from the walls and any vertical pillars that extend into the floor.


What can I walk on the floor screed?

Liquid Flowing Floor Screed can be walked on in around 24 hours dependent on the temperature maintained in the building.

Fire Risk?

Liquid Flowing Screed Floors are non-combustible (tested ZB5476 part 4)

Why Order your screed floor installation from us?

We have many years of experience in recommending and installing different screed products.
Call us, or click the get a quote button and we will source the correct product based on your requirement.

Approved layers for:

pic3 pic4

© Copyright 2013 A.Donnelly Flooring Ltd | Design by table59