Liquid Floor Screed Pumps

LIQUID SCREED SPECIALISTS CUMBRIA
 

A COST-EFFECTIVE AND ENVIRONMENTALLY FRIENDLY ALTERNATIVE

Flowing liquid screed is a cost-effective and environmentally friendly alternative to traditional labour intensive sand and cement screeds and complements all types of flooring including tile, stone, resin and engineered wood. Liquid screed works very well with all types of underfloor heating system (UFHS) as it conducts heat 30% better than traditional screed. If your project is time sensitive, the UFHS can be used to force dry the screed.

Avon Construction are approved applicators and meet the strict criteria for the application of Gyvlon and the complete flooring system. Within the Gyvlon® Screed “Environmental screed solutions” range THERMIO®+ Technology improves the performance of underfloor heating systems by creating a screed that is specifically designed to complement low temperature heating systems.

Gyvlon® Screed THERMIO®+ is the only screed with a guaranteed thermal performance.

Gyvlon Benefits

Gyvlon’s range of screeds are manufactured from our recycled calcium sulphate binder (a by-product of the production
of Hydrofluoric acid), selected aggregates and additives to produce a free flowing self-compacting screed manufactured
to BSEN 13813:2002.
Gyvlon screeds are designed to provide a level surface in both commercial and domestic buildings prior to the
application of floor finishes. It can be used as a bonded, unbonded or floating construction, it is particularly suited to
use with underfloor heating.
Gyvlon is available in various mix designs and used as part of many building systems to offer specific solutions, for
further advice on our screeds and building systems please speak to the Specification Team.
Liquid Screed
Gyvlon, due to its fluid nature is up to ten times quicker to install than sand cement screeds. Gyvlon greatly reduces the
amount of manual labour required allowing up to 2000m2
to be installed in one day.
Following installation, Gyvlon cures quickly giving sufficient strength to allow foot traffic after 24-48 hours, the floor
can then be loaded after 7 days. Gyvlon forms a self-curing membrane removing the need for polythene sheeting,
eliminating curling and reducing shrinkage.
Gyvlon is liquid in application and self-compacting this results in a SR2 surface finish (BS8204) which can greatly
eliminate the need for smoothing compounds prior to the application of some floor finishes.
The self-compacting nature coupled with the gypsum crystallization process provides excellent compressive and
flexural strength even at reduced screed thickness.
Thickness (Minimum)
Bonded >12mm(Excelio Only)
Bonded 25mm
Unbonded 25mm (Excelio Only)
Unbonded 30mm
Floating Residential 35mm
Floating Commercial 40mm
Underfloor heating Minimum 20mm Cover to pipe work (Thermio Only)
Underfloor heating Minimum 25mm Cover to pipe work
NB. Where floor zones are in excess of these thicknesses, we recommend additional insulation
is used and the screed reduced to optimize system performance.

Underfloor Heating
Gyvlon is ideally suited to underfloor heating as it achieves full encapsulation of the heating conduit eliminating
entrapped air and honeycombing, this provides a superior heat transfer between pipe and screed. This combined with
Gyvlon’s higher thermal conductivity (2.0W/mk +/- 0.2) and minimal pipe covering results in a greatly improved
reaction time and reduced flow temperatures.

Drying Times / Force Drying
Following installation, Gyvlon dries at a rate of 1mm per day up to 40mm and 0.5mm per day thereafter, as Gyvlon can
be installed thinner than sand cement this can allow for reduced drying times.
The drying rate per day can be increased by good site management and use of force drying, refer to ‘Floor covering
preparation and Drying’


Joints and Bay Sizes
Gyvlon has a smaller shrinkage profile than is associated with sand cement screeds, allowing for a reduction in
expansion joints, this creates fewer weak points in the screed finish. Reducing the number of expansion joints having to
be reflected in the floor finish will provide a more aesthetically pleasing appearance. Refer to ‘Joints and Bay sizes’ for
more information.


Protein Free
Unlike sand cement screeds Gyvlon is 100% protein free, making it ideal for application in medical or other areas of
hygienic importance as it cannot harbour bacteria.
Availability and Delivery
Gyvlon screeds are produced and manufactured to BSEN13813:2002 at readymix plants and delivered in truck mixers
or by Transmix/Brematt/ volumetric mobile mixing vehicle.
Gyvlon is also available for smaller areas as a pre-blended bagged material.