KENYA STANDARD    FDKS 2909:2020     
                                                                                    ICS  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Coated steel roofing and walling 
accessories — Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
© KEBS 2020 First Edition 2020 
 
 
  FDKS 2909:2020     
ii  © KEBS 2020 — All rights reserved TECHNICAL COMMITTEE REPRESENTATION 
 
The following organizations were represented on the Technical Committee:  
 
Maisha Mabati Mills Ltd.  
Kenya Industrial Research and Development Institute (KIRDI)  
Consumer Information Network  
Mabati rolling mills Ltd.  
Tononoka Steels Ltd.  
Kaluworks Ltd.  
Numerical Machine Complex  
University of Nairobi  
Space and Style  
Strathmore University 
Ministry of Transport and Infrastructure — Materials Testing  
Multimedia University of Kenya 
Kenya Bureau of Standards — Secretariat 
 
 
 
 
 
Kenya Bureau of Standards — Secretariat 
 
 
 
 
 
 
 
REVISION OF KENYA STANDARDS 
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed.  Suggestions 
for improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, 
are welcome. 
 
 
 
 
 
 
 
 
© Kenya Bureau of Standards, 2017 
 
Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 130 of 2001  of the Laws of Kenya, copyright subsists 
in all Kenya Standards and except as provided under Section 25 of this Act, no Kenya Standard produced by Kenya Bureau of Standards 
may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from the 
Managing Director.  KENYA STANDARD                                        FDKS 2909:2020     
 
ICS 
© KEBS 2020 — All rights reserved   iii  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Coated steel roofing and walling accessories 
— Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS) 
 
Head Office: P.O. Box 54974, Nairobi-00200, Tel.: (+254  020) 605490, 602350, Fax: (+254 020)  604031 
E-Mail: info@kebs.org, Web:http://www.kebs.org  
 
Coast Region    Lake Region     Rift Valley Region  
P.O. Box 99376, Mombasa-80100  P.O. Box 2949, Kisumu-40100       P.O. Box 2138, Nakuru-20100 
Tel.: (+254  041) 229563, 230939/40 Tel.: (+254 057) 23549, 22396       Tel.: (+254 051) 210553, 210555  
Fax: (+254  041) 229448   Fax: (+254 057) 21814 
 
  FDKS 2909:2020     
iv  © KEBS 2020 — All rights reserved  
Foreword 
 
This Kenya Standard was prepared by the Technical Committee on Steel and Aluminum products and 
metallurgy under the guidance of the Standards Project Committee, and it is in accordance with the procedures 
of the Kenya Bureau of Standards. 
 
 
 
 
 
 
 
 
During revision of this standard, reference was made to the following documents; 
 
 
 
 
 
 
 
Acknowledgement is hereby made for the assistance derived from these sources. 
  
KENYA STANDARD       FDKS 2909:2020     
 
 
© KEBS 2017 — All rights reserved   1  
 
Coated steel roofing and walling accessories — Specification  
 
 
1 Scope 
 
This Kenya Standard specifies requirements for roofing and walling accessories made from galvanized, 
galvalume, pre-painted or granulated steel for external use. 
 
2 Normative references 
 
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest edition of the referenced 
document (including any amendments) applies. 
 
KS EAS 11, Galvanized plain and corrugated iron sheets — Specification  
 
KS EAS 410, Hot-dip aluminium-zinc coated plain and corrugated steel sheets — Specification  
 
KS EAS 468, Pre-painted metal coated steel sheets and coils — Specification  
 
 
KS 2025, Metal roofing tiles — Specification 
 
3 Terms and definitions 
 
For the purposes of this standard, the following terms and definitions shall apply: 
 
3.1 
ridge 
 
narrow caps made of metal coated, pre-painted or granulated pre-painted steel sheeting installed at the highest 
point of a pitched roof and runs the length of the roof to keep water from making its way into the attic 
 
3.2 
flashing 
 
narrow pieces of metal coated ,pre-painted  or granulated steel sheeting  that are installed  at the intersection 
between the vertical faces of walls or framing and pitched roofs, flat roofs, gutters etc. to prevent moisture 
ingress into joints 
 
They are classified into  
 
a) Horizontal cover flashings 
 
b) Apron flashings 
 
c) Stepped cover flashings 
 
d) Raking cover flashings 
 
 
 
  
2  © KEBS 2020 — All rights reserved 3.3 
valleys 
 
a trough made of galvanized, galvalume, pre-painted or granulated steel sheeting installed at the intersection 
of two roof surfaces having an external angle less than 180º to provide water drainage from the roof  
 
3.4 
louvre 
a ventilation product made from galvanized, galvalume or pre-painted steel that allows air to pass through it 
whilst keeping out unwanted elements such as water, dirt and debris. It comprises of a framed opening installed 
on walls, windows or doors and fitted with moveable or fixed horizontal steel slats. 
 
3.5 
gutter 
 
a trough made of galvanized, galvalume or pre-painted steel that is attached to the roof of a building that 
collects and directs rain water away from the roof and the eaves 
 
 
3.6 
downpipe 
 
a pipe made of galvanized, galvalume or pre-painted steel attached to the side of a building, through which 
water flows from the roof into a drain 
 
3.7 
length 
 
distance along the profile 
 
3.8 
width 
 
distance across the profile 
 
3.9 
profile 
 
the shape obtained after profiling steel sheet in a roll former to form respective accessory 
 
4 Requirements 
 
4.1  General  
 
4.1.1 All roofing and walling accessories shall be made of materials conforming to KS EAS 11, KS EAS    
             410, KS EAS 468, and KS 2025 as per specific specification for the quality ordered. 
 
4.1.2  All roofing and walling accessories shall meet the specification of this standard. 
 
4.1.3 The profile of respective accessory shall be as per agreement between purchaser and manufacturer. 
 
4.2 Dimensions 
 
4.2.1 Length 
The length of respective accessory shall be as agreed between purchaser and manufacture and shall not differ 
by more than ± 5% of nominal value indicated by manufacturer. Dimensions for length shall be expressed in 
millmetres (mm). 
 
 
4.2.2  Width                                                                                                FDKS 2909:2020     
© KEBS 2020 — All rights reserved   3  
The actual width of relevant accessory shall be as agreed between purchaser and manufacture and shall not 
differ by more than ± 2.5% of nominal value indicated by manufacturer. Dimensions for width shall be in 
expressed in millimetres (mm). 
 
4.2.3  Thickness 
 
The thickness of material of accessory construction shall be the thickness specified in KS EAS 11, KS EAS 
410, KS EAS 468, and KS 2025.Dimensions for thickness shall be expressed in millimetres (mm). 
 
4.3  Workmanship 
 
The surface of an accessory shall be free from defects that may be detrimental to its practical use from its 
serviceability or appearance or both. 
 
5 Marking  
 
5.1 Each accessory piece shall be legibly marked with the following information: 
 
a) the manufacturer’s name or trademark or both; 
 
b) the batch identification; 
 
c) thickness in millimetres (mm); 
 
d) coating designation; and 
 
e) manufacturer’s standardization mark (SM) permit number. 
 
5.2 For pre-painted and granulated accessories the marking shall be on the reverse side whereas for 
galvanized or galvalume accessories, making shall be on either side. 
 
6 Inspection  
 
Inspection shall be as follows: 
 
a) Respective accessory sample taken shall comply with the requirements in 4.3 and Clause 5 
 
b) When part of the test results for physical properties of the accessory construction material fail to meet 
the requirements, a retest using double the number of test pieces taken from the same batch or lot is permitted. 
The test methods used to measure the physical properties shall be in accordance with KS EAS 11, KS EAS 
410, KS EAS 468 and KS 2025. 
 
   
4  © KEBS 2020 — All rights reserved  
Annex A 
(informative) 
 
Examples of Accessories profile types 
 
 
A.1 Girth ridge 
 
 
 
 
 
 
 
A.2 Barge flashing 
 
 
 
 
 
 
 
 
 
 
 
                                                                                               FDKS 2909:2020     
© KEBS 2020 — All rights reserved   5  
A.3 Ribbed girth ridge 
 
 
 
 
 
 
A.4 Valley 
 
 
 
 
 
 
 
 
 
 
 
 
6  © KEBS 2020 — All rights reserved A.5 Gutter 
 
 
 
 
 
 
A.6 Louvre