A

B

• Please read this guide through to make yourselvesfully aware of how the system is laid.

• You will need to ensure that you have ordered andhave the correct Filon over-roofing sheets andprofix spacers for your requirements. If in doubtplease ring Filon on 01543 687300.

• You have the correct fixings.If in doubt contactyour fixing supplier.

• You have the correct tools.

• You have, and are using, the correct safety equip-ment appertaining to the contract and that youand your colleagues will be able to work in a safe manner.

A. Using the profix spacer* system you will need tocrop back surplus hook bolt threads above the nut. Ensure that no sharp edges are left and thatthe bolt heads will not project above the spacer.

B. If using the Jablite insulation system, bulk growthon the roof will have to be removed to ensure a sta-ble surface for the insulation to sit on. Removal ofsuch growth should be carried out in line with cur-rent Asbestos Regulations in force at the time of thecontract. You may not need to crop the existingbolts with this system (carry out site trial first).

C. Multi-foil insulation can be used (we recommendthe BBA certified Kontrol Multi-foil solution), thisinsulation will lie between the profix spacers andmust be sealed at all joints to ensure air tightness.(See step 3)

This basic guide is illustrative only. For the sake of clarity, access equipment should always confirm to theHealth and Safety at Work Regulations.

For further information, please call our technical department on 01543 687300 or email technical@filon.co.uk

A basic guide to Filon over roofing

Step one

• Do not walk on asbestos or fibre cementsheets as these will vary and are likely to be fragile.

• Do not walk on Filon over-roofing after it hasbeen fixed - you may cause some damage tothe sheets and fixings. If access is requiredplease ensure the correct safety proceduresare in place.

• Note: The Filon over-roof system shouldalways be laid in the same direction of lay asthe original roof.

*Profix spacers carry patent no. GB2296021

D

REMEMBER: Lay the Filon over-roof system in thesame direction as the original roof.

A. You should have on site sufficient PROFIX starter spacersas the number of purlins on the contract. Commenceby fixing a PROFIX starter on each purlin using a tem-porary fix. PROFIX spacers are designed to cover theexisting fixing and locate centrally over the purlin.

B. Lay and join PROFIX spacers to PROFIX starters. Onsteeper pitch roofs (above 15˚) you will find it easier tostitch the PROFIX spacer to the old roof using a TECstitcher, or similar, ensuring correct alignment with thepurlin below.

C. The PROFIX spacers have a notch to locate over sidelaps of existing sheets. The PROFIX spacers will pro-trude to locate the next PROFIX spacer.

D. The application of a thick wallpaper paste to the areawhere the Profix spacers sit will help encapsulate anydust when the roof fixings penetrate the asbestossheeting.

If insulation is to be included there are three systems.

A. Quilt fibreglass up to 100mm deep to be usedwith a profix 60 spacer.

B. Quilt fibreglass up to 50mm deep to be used witha profix 25 spacer.

C. Jablite insulation, no profix spacers are required.

D. Kontrol Multi-foil or similar can be used toreduce U-values with either the profix 25 orprofix 60 spacers.

When the sheet is laid the PROFIX will extend pastthe end of the sheet to continue the line across.

Step two

Step three

Step four

A/B

Lay over-roofing sheetover the PROFIX spacers.

A A. Ensure the PROFIX spacer is aligned with thepurlin. Fix with self-drill/tap fasteners fixedthrough the FILON sheets, spacers or boardsand existing roof into the purlins below. IMPORTANT: ensure fixing goes through the topof the PROFIX spacer.

B. Fix with self-drill/tap fasteners fixed through theFILON sheets, Jablite and into roof purlins.

C. For fixing to concrete purlins, contact ourTechnical Department on Tel. 01543 687300.

B

A

END AND SIDE LAP SEALANT POSITION

A. Before fixing next sheet, position side lap sealwith preformed Butyl mastic sealing strip.

B. Position of end lap sealant.

Side stitch laps at centres not exceeding 450mmwith Type RV6604 6-3W Bulb-tite rivets or 8mm x25mm Tec High Torque Stitcher with 19mm twinseal washer.

Plain wing two piece FILON ridge capping.

Profiled polyethylene closure.

PROFIX spacer.

Plain wing one piece cranked ridge capping.

Profiled polyethylene closure.

PROFX spacer.

Step five

Step six

Step seven

A

Step eight

FILON PRODUCTS LIMITEDUnit 3 Ring Road, Zone 2, Burntwood Business ParkBurntwood, Staffordshire, WS7 3JQEmail: sales@filon.co.uk www.filon.co.uk

Tel: 01543 678300 Fax: 01543 687303

PROFIX spacer

PROFIX spacer orpolyethylene filler

Cover flashing

Lift, redress orrenew wall abut-ment flashing

Information and recommendations contained in this publication are given in good faith without warranty or guarantee. Because we are constantly seeking to improve our products,we reserve the right to change specifications at any time. No liability can be accepted for any claims, losses or demands arising out of the contents of this publication.This statement does not affect any statutory rights which cannot be excluded by agreement.

Printed in England Our ref: F66/PB/1010 ©FILON Products Limited

General Guide

BIG SIX PROFILESFix in alternative corrugation, except at eaves andoverlaps, where fixing should be every corrugation.

STANDARD 3”Fix every third corrugation. Lay FILON Over-RoofSheet over the PROFIX spacers or Jablite and securewith recommendation fixings. Where applicableensure fixings go through TOP of PROFIX spacer.

OTHER PROFILESFix through every corrugation

GENERALFilon over-roofing sheets come in a standardopaque grey finish and can also be supplied astranslucent to go over rooflight areas. Other standard British RAL colours are also available.

For a detailed fixing guide or technicalinformation, contact our technicalDepartment on 01543 687300

Labour Safety• Do not walk on fragile roof sheets. If access is

required across the roof area appropriate stagingshould be used so as to comply to Work to theHealth & Safety Executive Guidance Notes,HS(G)33: Safety in Roof Works.

• Old asbestos cement sheets are classified asfragile and unpredictable. Although standard Filonover-roofing will provide additional strength youshould always treat the roof as fragile afterwards.

• Filon can supply GRP sheets designed for extrastrength i.e. DR or Supersafe. (Supersafe willachieve a non fragile roof for the life of the roof.)

• To meet wind loading requirements it may be necessary to use stronger GRP sheets at theverges or eaves. Contact our technical department for advice.

Transport and Storage• Store sheets on flat, clean, level battens at

1.5m centres.

• Stacks should not exceed 1m in height and mustnot overhang at ends.

• Protect against theft and from being blown away.

• ALWAYS protect sheets stored in the open withopaque waterproof covers – translucent rooflights will discolor if water penetrates the pack of sheets.

ASSOCIATE MEMBER

CO – PARTNERSHIP GUARANTEE SCHEMEPARTICIPANTNo 21315 / No 01268560