August 8 2022

SRT

Screed Replacement Tile

The Screed Replacement Tile (SRT) system is our market leading, low profile alternative to a traditional screed. Through removing moisture from the build process, and removing thermal mass from the floor, we are able to offer an underfloor heating system that is unparalleled in its speed of response.

Over the last 20 years the SRT system has established itself as the most durable, dry installed alternative to screed. It is incredibly robust and has been used in thousands of projects without a single failure. From small residential projects to large scale commercial sites, the SRT system affords architectural specifiers and end-users alike the confidence that their floor will not fail.

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Suitable For All Floor Finishes

At first glance the SRT seems unremarkable, and its immense benefits are not obvious. The simple fact that hundreds of architects now specify the SRT system is a testament to the product’s outstanding capabilities. It is difficult to imagine that an 18 mm thick ceramic tile can accept a point load of 5 kN (500 kg) and can absorb huge amounts of deflection making it suitable for installation over both solid and suspended floors. The SRT system is used mostly in conjunction with stone and tile floor finishes and prevents them cracking; but any floor finish can be installed on top.

No Expansion Joints or Decoupling Membrane Required

As the SRT expands so little (approximately 0.1 mm/10 m) it does not require expansion joints in areas up to 450 m². As most stone and tile floor finishes have a similar coefficient of expansion as the SRT they move together as one. As the Screed Replacement Tile system forms a new, entirely decoupled layer over the existing substrate, there is no requirement for a decoupling membrane when installing a stone or tiled finish. We are so confident of this that we will guarantee your finish will not fail.

Full-scale Deflection Tested

In 2011 the Building Research Establishment (BRE) conducted a full-scale test to establish the exact deflection capability of the SRT system. The test was undertaken to dispel any concerns the design team behind the New Weston Library project in Oxford had. The results were conclusive and demonstrated once and for all what remarkable deflection properties the system has. The full test report is available upon request.

Superior Heat Output

Due to its minimal thermal resistance and thin form factor, the Screed Replacement Tile’s heat output surpasses many other systems. According to BS EN 1264 the combined thermal resistance of a floor finish and screed should not exceed R = 0.15 m² K / W (1.5 Tog).

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Datasheet

Installation Guide

Post-installation Guide

Fitting Floor Finishes

Case Study

Screed Replacement Tile:

Datasheet

Download PDF

Product Specification:

Density:

1950 ± 100

kg / m³

Thickness

18 ± 1

Tile Dimensions:

550 x 200 ± 2

Mass:

35.3

kg / m²

Fire Classification:

Thermal Resistance (R-value):

0.017

m² K / W

Thermal Conductivity (λ-value):

1.03

W / mK

Packaging:

Pallet Contents:

180 tiles / 27 m²

Pallet Dimensions:

W1200 x D800 x H1000 mm

Pallet Mass:

W1200 x D800 x H1000 mm

* to EN 13501: 2007

Product Benefits:

Boasting virtually no thermal resistance, a lower specific heat capacity than screed, and a much thinner form factor, SRT provides rapid heat-up and cool-down with no loss of floor strength.
Simple to install; no specialist knowledge or training is required.
Suitable for all floor finish choices, however some floor finishes such as vinyl and carpet may require the application of a levelling compound first.
5kN point load capacity.
Tested deflection capability with stone floor of ℓ/240 (i.e. SRT can tolerate 20 mm deflection over 5 m) is three times better than standard ℓ/720 requirement for stone or tile installation.
No decoupling membrane required.
As the SRT system expands and contracts minimally across the range of temperatures it will experience in service, there is no requirement for movement or expansion joints up to 450 m².
Accepts any format tile, porcelain or stone; no maximum size.
The SRT system requires only 48 hours to fully cure before heating system can be switched on and floor finish laid. No heating up protocol is required as the system is fully cured after 48 hours.
Five-year warranty provided for tile, porcelain and stone floor finishes supplied and installed by others on top of the Screed Replacement Tile without a decoupling membrane.

Product Specification:

Density:

1950 ± 100 kg / m³

Thickness:

18 ± 1 mm

Tile Dimensions:

550 x 200 ± 2 mm

Mass:

35.3 kg / m²

Fire Classification

A1 *

Thermal Resistance (R-value)

0.017 m² K / W

Thermal Conductivity (λ-value):

1.03 W / mK

Packaging:

Pallet Contents:

180 tiles / 27 m²

Pallet Dimensions:

W1200 x D800 x H1000 mm

Pallet Mass:

W1200 x D800 x H1000 mm

* to EN 13501: 2007

Product Benefits:

Boasting virtually no thermal resistance, a lower specific heat capacity than screed, and a much thinner form factor, SRT provides rapid heat-up and cool-down with no loss of floor strength.
Simple to install; no specialist knowledge or training is required.
Suitable for all floor finish choices, however some floor finishes such as vinyl and carpet may require the application of a levelling compound first.
5kN point load capacity.
Tested deflection capability with stone floor of ℓ/240 (i.e. SRT can tolerate 20 mm deflection over 5 m) is three times better than standard ℓ/720 requirement for stone or tile installation.
No decoupling membrane required.
As the SRT system expands and contracts minimally across the range of temperatures it will experience in service, there is no requirement for movement or expansion joints up to 450 m².
Accepts any format tile, porcelain or stone; no maximum size.
The SRT system requires only 48 hours to fully cure before heating system can be switched on and floor finish laid. No heating up protocol is required as the system is fully cured after 48 hours.
Five-year warranty provided for tile, porcelain and stone floor finishes supplied and installed by others on top of the Screed Replacement Tile without a decoupling membrane.

Screed Replacement Tile:

Installation Guide

Download PDF

01
Before unrolling the JUPITER system foil, ensure that surface is free from grit and other debris that may result in the Screed Replacement Tiles not lying flat. Vacuuming the heating panels is recommended.

02
Tape foil together where it overlaps.

03
Dip the tongue and one edge of each tile into the prepared glue so that they are well covered. Alternatively use a trowel.

04
Push the tongue of the tile into the groove of the receiving tile so that the adhesive is squeezed out. Push the short edge against the adjacent tile so that approximately 4 mm of adhesive remains between the tiles.

05
Tiles should be laid in brick bond format and approximately three or four rows can be laid before it is necessary to clean off excess adhesive.

06
Tiles can be cut using a wet or dry tile cutter or by using an angle grinder.

07
Scrape off excess glue and return it to pot.

08
Any remaining glue can be left if system is to be used as substrate to a further floor finish. Blue perimeter insulation should be left exposed until after final floor finish has been laid. Final floor should be butted up to the perimeter insulation.

Screed Replacement Tiles should never be installed at temperatures below 5 °C.

Screed Replacement Tile:

Post-installation Guidelines

Download PDF

Once installed the Screed Replacement Tile system requires 48 hours to completely cure.

The Screed Replacement Tile system is capable of accepting foot traffic typical of a building site and, provided that certain precautions are followed then our system can be used as a working surface before the final floor finishes are fitted.

The system can be used as a working surface if the following precautions are observed:

Towers and scaffolding should be erected on at least one layer of 18 mm ply.
Pallet trucks with load should be used only on two layers 18 mm ply.
Scissor lifts and cherry pickers should only be used on two layers of 18 mm ply and must be driven slowly.
Cherry pickers permissible to two tonnes with two additional layers of 18 mm ply.
Scissor lifts permissible to 2 tonnes with 2 additional layers of 18 mm ply.

The SRT is at risk of damage if the following points are not observed:

Pallet trucks of ANY kind should NOT be used directly on the system.
DO NOT apply heavy/point loads at the edge of the system.
DO NOT allow scissor lifts, cherry pickers etc. on to the floor without two layers of 18 mm ply.
DO NOT proceed with final floor installation on damaged or loose tiles.
DO NOT allow any foot traffic on the system before the 36-hour cure time.

Screed Replacement Tile:

Fitting Floor Finishes

Download PDF

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Stone and Tile Floors

Stone and tile finishes should be adhered using flexible adhesive which conforms to BS EN12004 Class C2S1.

The SRT floor should be clear of grease and dust. Adhesive primers may be used if deemed necessary by the stone installer. Do NOT install a decoupling mat.

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Carpet and Vinyl Finishes

In order to avoid ‘shadowing’ through the finished floor a levelling compound should be used over the Screed Replacement Tiles. In the case of carpets, gripper rods can be adhered to the Screed Replacement Tile system.

Timber Floors

Engineered timber floors can be adhered to the Screed Replacement Tiles using flexible adhesive such as Sikabond T52/T54. Localised levelling with smoothing compound may be required before installation of timber floor finishes.

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Timber Floors

Stone and Tile Floors

Stone and tile finishes should be adhered using flexible adhesive which conforms to BS EN12004 Class C2S1.

The SRT floor should be clear of grease and dust. Adhesive primers may be used if deemed necessary by the stone installer. Do NOT install a decoupling mat.

Stone and Tile Floors

Stone and tile finishes should be adhered using flexible adhesive which conforms to BS EN12004 Class C2S1.

The SRT floor should be clear of grease and dust. Adhesive primers may be used if deemed necessary by the stone installer. Do NOT install a decoupling mat.