Photo/isometric drawing

provided by manufacturer

Porotherm 300mm, 425mm and 490mm Solid Wall Construction

Description of Product

This is an assessment of Wienerberger

Porotherm 300, 425 and 490mm an engineered

clay block with tongue and groove interlock for

use as load bearing and non-loadbearing walls. It is suitable for use on single and multi-

storeys.

Key Factors Assessed

Safety in case of Fire

Health, Hygiene and Environmental

Safety in Use

Protection against noise

Energy Economy and heat retention

Durability serviceability and identification

Validity

This certificate was first issued on 8th December 2017 and is valid until 8th December 2021

Issue Dated 8th October 2019

Certificate No: EWWS182D

Porotherm blocks are highly perforated clay blocks intended for use in masonry which is above dpc and protected against

water penetration. Protection may be provided to external masonry by suitable render or cladding or by its location as an

inner leaf in cavity walling or as an internal partition.

The blocks are supplied in thickness of 300, 400 and 490mm and are placed on a bed of Porotherm thin joint mortar. The

bed surfaces of the blocks are ground flat and parallel such that the target thickness of the bed joint is 1mm. The cross-

joints are formed by interlocking features in the header ends of the unit and contain no mortar.

Porotherm blocks all carry the CE mark.

The dimensions of each block are:

300: 248x300x249mm

400: 248x400x249mm

490: 248x490x249mm

The Porotherm solid wall blocks are suitable for external wall construction providing it is protected from external weather

and moisture by appropriate DPC’s and an approved cladding or render system.

Appropriate thermal analysis will be provided in each instance to demonstrate continued compliance with Approved

Document L.

For LABC Warranty purposes:

All blocks are suitable for use in solid wall construction subject to the provision of an independent cladding system with a

drained cavity in accordance with table 1 Chapter 7.3 of the LABC Warranty Technical Manual.

The exception being, blocks of 365mm thickness or greater where the use of a Parex render system that is provided with a

full project specific design package for the specifications of the render and installed by Parex only.

For Scotland purposes:

The specifications and materials referred to have been assessed and approved in accordance with the Building (Scotland)

Regulations 2004 and in accordance with the supporting guidance in the Domestic Technical Handbooks which came into

force with effect from 1 October 2019.

Where reference is made on a plan or specification document to any Code of Practice, British or European Standard or

manufacturer’s instruction it shall be construed as a reference to such publication in the form in which it is in force at the

date of this Registered Detail.

The materials specified shall not be changed without first gaining approval so to do. Failure to do so will invalidate the

Registered Detail.

This Registered Detail should not be regarded as a formal approval under the building warrant process prescribed by the

Building (Scotland) Act 2003 enacted from 1 May 2005. It supports the site-specific building warrant submission required in

every case.

This Registered Detail shall contribute to compliance with relevant Mandatory Standards specified under the Building

(Scotland) Regulations 2004 as amended when read with the Scope of Registration and the Conditions of Certificate

Sections to this Registered Detail.

LABC and LABSS consider that, Porotherm 300mm, 425mm and 490mm Solid Wall Construction, 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 product is acceptable.

AD A Structure

Note: Relates to A1 only.

AD B Fire Safety

Note: Relates to B4.

AD C Site Preparation and Resistance to Ground Moisture

Note: The product can contribute to satisfying this requirement.

AD E Resistance to the Passage of Sound

Note: The product can contribute to satisfying this requirement.

AD L1A & L2A Conservation of fuel and power

Note: The thermal insulation performance of this system should be considered in the

context of the contribution made to the overall performance of the wall.

ADL1B & L2B Conservation of fuel and power

Note: The thermal insulation performance of this system should be considered in the

context of the contribution made to the overall performance of the wall.

The Building Regulations 2010 (as amended) England

AD L1A & L2A Conservation of fuel and power

Note: The thermal insulation performance of this system should be considered in the

context of the contribution made to the overall performance of the wall.

The Building Regulations 2010 (as amended) Wales

AD L1A & L2A Conservation of fuel and power

Note: The thermal insulation performance of this system should be considered in the

context of the contribution made to the overall performance of the wall.

The Building (Scotland) Regulations 2004 (as amended)

The Building (Scotland) Regulations 2004 (as amended)

Technical Handbooks - Domestic

Regulation 8 Durability, workmanship and fitness of materials

0.8.5: Ways of establishing the fitness of materials

Note: The system is acceptable provided it is constructed in accordance with the

manufacturer’s details.

Regulation 9 Building Standards applicable to construction

Note: Construction shall be carried out so that the work complies with the applicable

requirements of schedule 5.

Mandatory

Standard 1.1 Structure

Note: The system is acceptable, provided it is constructed in accordance with the

manufacturer’s details including that the mortar joints to the blocks shall only be

Porotherm bed joint mortar supplied by the manufacturer.

Mandatory

Standard 2.3 Structural protection

Note: The system is acceptable provided it is constructed in accordance with the

manufacturer’s details.

Mandatory

Standard 2.5 Internal linings

Note: The system is acceptable provided it is constructed in accordance with the

manufacturer’s details and specified to suit the location and use of the block as

prescribed by the manufacturer.

Mandatory

Standard 2.6 Unprotected areas

Note: To be accessed at each application given that the construction using the blocks

will be subjected to site-specific constraints.

Mandatory

Standard 3.10 Precipitation

Note: Porotherm blocks should be fully protected at all times from the elements. The

system is acceptable provided it is constructed in accordance with the

manufacturer’s details and by an accredited contractor. Any external wall cladding

used in association with the product is not part of this certificate and should be

separately assessed for suitability when used with this product and to satisfy the

cladding manufacturer’s conditions and specifications.

Mandatory

Standard 3.15 Condensation

Note: The system is acceptable provided it is constructed in accordance with the

manufacturer’s details and by an accredited contractor.

Mandatory

Standard 5.1 Noise separation

Note: The system can contribute to compliance with this standard provided it is

constructed in accordance with the manufacturer’s details and by an accredited

contractor.

Mandatory

Standard 6.2 Building insulation envelope

Note: The system will contribute to the required U-value in any site-specific case, provided it is constructed in accordance with the manufacturer’s details and by an

accredited contractor.

LABC Warranty

LABC Warranty conditionally accepts the use of Porotherm 300mm, 425mm and 490mm, when installed

and used in accordance with the Scope and Conditions of this Certificate. Visit www.labcwarranty.co.uk

for our LABC Warranty Technical Manual requirements and Warranty conditions of acceptance.

Technical data for Baumit renders

Technical data for Ecorend renders

Porotherm brochure and installation guides

Porotherm best practice guide

Lucideon technical report, special publication 148 June 2015

For Scotland purposes:

Ceram Brochure – Technical report and design guidance for the use of Porotherm Blocks in the UK – Special publication 148

Ancon – Wall ties for use with Cellular clay blocks

Fischer test report – fixing tests for Wienerberger ‘Porotherm’ blocks

Wienerberger Building Value – Installation brochure

Wienerberger Building Value – Porotherm Bed joint mortar, for masonry work using Porotherm hollow clay precision blocks.

Wienerberger Building Value – Typical details

Fire testing 190.pdf - the fire resistance performance of a loadbearing wall assembly, tested in accordance with SB EN 1365-1:

1999, report number 331583.

Pdf 186546 fr.pdf – the fire resistance performance of a loadbearing wall assembly, tested in accordance with SB EN 1365-1:

1999, report number 186546.

Sound review of separating wall Muiryhall Street, Coatbridge.pdf (Dated 5th September 2017)

Wienerberger Ltd

Wienerberger House

Brooks Drive

Cheadle Royal Business Park

SK8 3SA

Tel: 0161 491 8200

Email: office@wienerberger.co.uk

Website: www.brick.co.uk