Photo/isometric drawing

provided by manufacturer

Ty-Mawr Sylfaen Insulated Foundation System

Description of Product

This is an assessment of a foundation system

using GLAPOR recycled cellular glass gravel

and associated ancillary components. GLAPOR cellular glass gravel is a lightweight insulating

fill produced from foamed glass, a product

formed from 100% recycled glass. The product has a technical assessment and a CE

Mark dated 2010.

The product can be used as a load bearing

insulated layer or as loose fill insulation. It can

also be used in the following situations:

• Perimeter insulation under floor slabs in domestic and non- domestic buildings and

under car park decks

• Lightweight fill in arches or bridge

abutments, road/rail construction and frost

free insulation of supply pipes

• Lightweight draining backfill for retaining

structures

Key Factors Assessed

Mechanical Resistance & Stability

Safety in case of Fire

Health, Hygiene and Environmental

Safety in Use

Durability serviceability and identification

Validity

This certificate was first issued on 19th July 2017 and is valid until 19th November 2020

Issue Dated 6th November 2019

Certificate No: EW897

Sylfaen Insulated Foundation System is constructed using a recycled foamed glass gravel called GLAPOR which is supplied

by Ty-Mawr Lime Ltd. The product has been technically evaluated by Price and Myers who are consultant structural

engineers.

This is an assessment of a specified insulated foundation system intended to be used as a load bearing insulated layer for a

number of applications including:

• Perimeter insulation under floor slabs in domestic and non- domestic situations

• Perimeter insulation under car park decks

• Lightweight insulation fill on arches or in bridge abutments

• Lightweight, draining backfill for retaining structures

• Lightweight fill in road/rail construction for frost free insulation of supply pipes.

GLAPOR is manufactured in two products, SG 600 P or SG 800 P, the key difference is the maximum compressive strength

which from Table 1 in the technical evaluation by Price and Myers is:

257 Fcd for the SG 600 P and

370 Fcd for the SG 800 P - both at 2% compression.

GLAPOR is to be used below ground to support buildings and provide satisfactory thermal insulation of the substructure

floor. For the purposes of the valuation by Price and Myers a minimum thickness of 400mm of the SG 600 P was used.

The technical evaluation has been in accordance with the relevant Euro codes and associated National Annexes for the UK.

Thermal properties - A minimum thickness of GLAPOR glass gravel is required to achieve the required thermal properties for

the building as indicated in the Table 2 of the technically evaluation by Price and Myers and replicated below.

Typical thickness of GLAPOR cellular foam gravel for SG600P

Building type Thermal performance

0.22W/m2K 0.15W/m2K 0.12W/m2K

Detached 240mm 400mm 520mm

Semi-detached 210mm 370mm 490mm

Terraced 140mm 290mm 400mm

In certain circumstances the GLAPOR layer must have a minimum thickness of 400mm and the SG 800 P product used depending on the number of storeys and bearing pressure of the soil as indicated in Section 5, Tables 6, 7, 8 and 9 of the

preliminary assessment by Price and Myers.

GLAPOR should not be used in situations that has a high water table level as this will reduce the insulation value of the

product. The product should be used on well drained sites and a site specific ground investigation will be required to

confirm this.

 

  

Structural stability

Dead loadings have been assessed for timber floors and roofs, where there is a large span (commercial and educational

buildings) steel beams or engineered timber beams are acceptable to support timber joists where they are supported by

walls and spread the loads to the foundations. The use of columns would Impose point loads on the floor slab and should

not be used. Any pitched roof angle of 30 degrees or less will be appropriate for the design, if the angle exceeds this value-

additional calculations would be required.

Imposed loadings have been assessed for domestic and residential, commercial and educational buildings with floor

loadings up to 3.00kN/m2, flat roof loadings with snow and access loadings up to 0.75 kN/m2 and pitched roofs up to

0.60kN/m2. No allowance had been made for snow drift loadings or green roofs and additional calculations would be

required where applicable.

Wind loadings - Vertical and horizontal wind loadings have been considered in the design using maximum wind loadings

used for the UK. The calculations have been completed assuming roughness of topography is not significant, for example

the building is not located near any cliffs/escarpments/hills etc. or terrain that could amplify the wind forces. If these are

significant, additional calculations would be required.

Geographical parameters - GLAPOR is proposed to be used in various areas throughout the UK and the minimum safe

bearing capacity should be 100KPa and does not cover situations of heave/shrinkage, hydrostatic pressure or subsidence.

This assessment assumes a level site. A site specific geotechnical assessment will be need to be completed to determine if

the soil has sufficient capacity to comply with the minimum requirements and if any additional geotechnical design

measures are required.

Building parameters - The maximum plan dimensions has been assessed and included in Table 5 of the technical

evaluation by Price and Myers (as replicated below) for the maximum storey (floor to floor) height, grid length and grid

width of the building of the building assuming the roof and floor spans on to the longitudinal walls only.

Assumed maximum building dimensions

Building Type Storey Height (m) Grid Length (m) Grid width (m)

Residential 3.1 4.0 5.0

Educational &

Commercial

4.0 7.0 8.0

For this evaluation a minimum slab thickness of 200mm is assumed and extending at least 200mm past the external face of

the wall. This figure could be reduced if a site specific design was carried out.

Maximum design loadings - The maximum design loadings have been assessed throughout the UK and tables produced

for the preliminary assessment for the maximum design loadings on residential and commercial/Educational buildings and

on the GLAPOR layer and soil below.

This assessment determines the maximum number of storeys feasible for a building using this foundation system relative to

design parameters.

The maximum number of storeys and grids depends on:

The type of building (residential/commercial/educational)

The construction is light or heavy weight

Bearing pressure of the subsoil.

Location of building in the UK

GLAPOR layer and thickness used

 

  

For this evaluation the following will be required:

The building design and loadings will need to be determined and categorised as light or heavy weight to use the tables

and a site specific design will be required for each building or design tables produced for simple buildings. (The light or

heavy weight category should be confirmed by Price and Myers to prevent confusion).

A site specific geotechnical assessment will be need to be completed to determine if the soil has sufficient capacity to

comply with the minimum requirements and if any additional geotechnical design measures are required.

Detailed assessment

Reinforced concrete slab (or raft) - A detailed assessment was carried out to evaluate the integrity of the structural slab

under the anticipated loadings using 'Robot' software to determine the soil capacity, slab deflections and crack widths. From

this analysis tables were produced to confirm maximum number of storeys and grids for light or heavy weight residential,

commercial and educational buildings in the UK.

Although Tables 11 and 12 show a minimum recommended reinforced slab thickness for a range of building types, a site

specific design will be required for the reinforced concrete slab for each building or design tables/calculations produced for

simple buildings.

Limecrete slab - As part of this assessment, Limecrete was considered as an alternative to a reinforced concrete raft. This

used the parameters given in Appendix B of the Price and Myers report and was assessed under the loadings of given in

section 5 of the Price and Myers report and was found to be susceptible to damage under the loads imposed by the walls.

If Limecrete is to be used for the ground bearing floor slab, a reinforced concrete foundation will be required to support

the load bearing walls around the building perimeter. Although the report states a typical 700mm x 250mm deep footing

with nominal reinforcement a site specific design will be required for each building or design tables/calculations produced

for simple buildings. Detailing of the reinforced concrete raft and strip foundation is given in Appendix C of the Price and

Myers report. As requested by LABC I have attached a three dimensional detail of the two types of foundation design (Raft

and Limecrete) that was sent as part of this package.

Durability, serviceability and identification - The product properties were stated in the Technical data sheets for the SG

600 P and SG 800 P. The durability, serviceability and identification details were not included in the Technical Data.

The manufacturer must exercise permanent internal control of production. All the elements, requirements and provisions

adopted by the manufacturer must be documented in a systematic manner in the form of written policies and procedures,  

including records of results performed. This product control system will ensure that the product is in conformity with this

assessment. The manufacture must only use components stated in the technical documentation for this product as assessed.

Safety in case of Fire - The product has no flammability, smoke or dripping in compliance with EN 13501-1.

Health, Hygiene and Environmental - The product must be manufactured, stored, handled, installed and disposed of in

accordance with manufacturers written instructions and must include all health and safety requirements in the UK.

Safety in Use - The product must be manufactured, stored, handled, installed and disposed of in accordance with

manufacturer’s written instructions and must include all health and safety requirements in the UK.

 

  

Installation of product

GLAPOR recycled cellular glass gravel and associated ancillary components to be installed strictly in compliance with the

Manufacturer’s written design parameters and installation details for the product including the following requirements:

Thermal properties

GLAPOUR should not be used in situations that has a high water table level as this will reduce the insulation value of the

product. The product should be used on well drained sites and a site specific ground investigation will be required to

confirm this prior to commencement of works on site.

Structural stability

Dead loadings

(i) The use of columns imposing point loads on the floor slab should be in accordance with structural details and

calculations from a suitably qualified person in accordance with current British Standards/Euro codes.

(ii) Any pitched roof angle of 30 degrees or less will be appropriate for the design, if the angle exceeds this value-additional

details and calculations are required from a suitably qualified person in accordance with current British Standards/Euro

codes to confirm suitability of the design.

Imposed loadings - No allowance had been made for snow drift loadings or green roofs and where necessary additional

details and calculations are required from a suitably qualified person in accordance with current British Standards/Euro

codes to confirm suitability of the design.

Wind loadings - The calculations have been completed assuming roughness of topography is not significant, for example

the building is not located near any cliffs/escarpments/hills etc. or terrain that could amplify the wind forces. If these are

significant, additional details and calculations are required from a suitably qualified person in accordance with current

British Standards/Euro codes to confirm suitability of the design.

Geographical parameters - A site specific geotechnical assessment will be need to be completed to determine if the soil

has sufficient capacity to comply with the minimum requirements and if any additional geotechnical design measures are

required.

Building parameters - A minimum slab thickness of 200mm is required and extending at least 200mm past the external

face of the wall. This figure could be reduced if a site specific design was carried out in accordance with structural details

and calculations from a suitably qualified person in accordance with current British Standards/Euro codes.

Maximum design loadings

(i) Site specific building loadings will be required for each building design

(ii) A site specific geotechnical assessment will be need to be completed to determine if the soil has sufficient capacity to

comply with the minimum requirements and if any additional geotechnical design measures are required.

Foundation design

(Reinforced concrete slab (or raft) - A site specific reinforced concrete slab design will be required for each project in

accordance with structural details and calculations from a suitably qualified person in accordance with current British

Standards/Euro codes.

Limecrete slab - A site specific reinforced strip foundation design will be required for each project in accordance with

structural details and calculations from a suitably qualified person in accordance with current British Standards/Euro codes.

 

  

Durability, serviceability and identification

The manufacturer must exercise permanent internal control of production. All the elements, requirements and provisions

adopted by the manufacturer must be documented in a systematic manner in the form of written policies and procedures,

including records of results performed. This product control system will ensure that the product is in conformity with this

assessment. The manufacture must only use components stated in the technical documentation for this product as assessed.

The product must be identified with the manufacturer's printed signage to the big bag packaging in which the product is

stored and sold

Health, Hygiene and Environmental

The product must be manufactured, stored, handled, installed and disposed of in accordance with manufacturers written

instructions and must include all health and safety requirements in the UK.

Safety in Use

The product must be manufactured, stored, handled, installed and disposed of in accordance with manufacturers written

instructions and must include all health and safety requirements in the UK.

LABC consider that, Ty-Mawr Sylfaen Insulated Foundation System will meet the functional

requirements of the Building Regulations (listed below) if the criteria detailed in this certificate are met;

The Building Regulations 2010 (as amended) England & Wales

Regulation 7 Materials and workmanship

Note: The system is acceptable.

AD A Structure

Note: Subject to limitations in Conditions of Certificate section.

AD B Fire Safety

Note: The system is acceptable.

AD C Site preparation and resistance to contaminants and moisture

Note: The system is acceptable.

AD L1A/L2A Conservation of fuel and power in new buildings

Note: The thermal insulation performance of this system must be in accordance with the

relevant requirements for new dwellings and new buildings other than dwellings as

appropriate.

AD L1B/L2B Conservation of fuel and power in existing dwellings

Note: The thermal insulation performance of this system must be in accordance with the

relevant elemental requirements for existing dwellings and existing buildings other

than dwellings as appropriate.

The Building Regulations 2010 (as amended) England

AD A Structure

Note: Subject to limitations in Conditions of Certificate section.

AD L1A/L2A Conservation of fuel and power in new buildings

Note: The thermal insulation performance of this system must be in accordance with the

relevant requirements for new dwellings and new buildings other than dwellings as

appropriate.

AD L1B/L2B Conservation of fuel and power in existing dwellings

Note: The thermal insulation performance of this system must be in accordance with the

relevant elemental requirements for existing dwellings and existing buildings other

than dwellings as appropriate.

The Building Regulations 2010 (as amended) Wales

AD A Structure Note: Subject to limitations in Conditions of Certificate section.

AD L1A/L2A Conservation of fuel and power in new buildings

Note: The thermal insulation performance of this system must be in accordance with the

relevant requirements for new dwellings and new buildings other than dwellings as

   

appropriate.

AD L1B/L2B Conservation of fuel and power in existing dwellings

Note: The thermal insulation performance of this system must be in accordance with the

relevant elemental requirements for existing dwellings and existing buildings other

than dwellings as appropriate.

The Building (Scotland) Regulations 2004 (as amended)

If you would like to discuss a specific use of the product in Scotland it will require an additional

assessment under the Scottish Building Regulations and accordingly you should contact the LABSS

STAS Administrator at www.labss.org

LABC Warranty

The use of the Ty-Mawr Sylfaen Insulated Foundation System has not been assessed to meet the

requirements of the LABC Warranty Technical Manual. If you would like to discuss a specific use

please make an enquiry to technical.services@labcwarranty.co.uk

Price and Myers Structural Engineer’s Technical Evaluation dated October 2016- Revision R3. (6 pages)

Price and Myers Structural Engineer’s Technical Evaluation Appendix B: Limecrete product information- Version 2/2015 (2

pages)

Price and Myers Structural Engineer’s Technical Evaluation Appendix C: Typical Footing Details dated 30/9/16 (1 page)

GLAPOR Cellular Glass Gravel – Technical Data SG 600 P

Three dimensional foundation details

Zertbaupruf GmbH Conformity of Production Control

Ty-Mawr Lime Limited

Unit 12

Brecon Enterprise Park

Brecon

Powys

LD3 8BT

Tel: 01874 611350

Email: tymawr@lime.org.uk

Website: www.lime.org.uk