IKO Grangemill

Water Lane

t: 01257 255 771
f: 01257 256 889

Frequently Asked Questions

These FAQs provide answers to some of the most frequently asked questions about IKO, the IKO product range, services, support and a whole host of other topics.

If you cannot find the answer to your question(s) in this section or would like to see additional content topics within these FAQs, please contact us and we will be happy to help.

Schools and Academies (1)

The CIF is capital funding that academies and sixth-form colleges can apply for each year, which is approved by the EFA (Education Funding Agency).

What Is It For?
Keeping academy and sixth-form college buildings safe and in good working order, addressing the issues with significant consequences that revenue or Devolved Formula Capital (DFC) funding cannot meet, i.e. poor building conditions, building compliance, energy efficiency and health and safety concerns. It also supports a number of expansion projects.

Who Can Apply?

  • Single academy trusts
  • Multi-Academy Trusts (MATs)
  • Sixth-form colleges

How can IKO help?
Working with IKO means that any changes to the funding process (i.e. where funding is / isn’t available) can be handled efficiently, helping to avoid any unforeseen complications. Applying for CIF can be a daunting task if taken alone, which is why IKO take proactive steps in creating a comprehensive case for your funding application. A complete description of a buildings current roofing condition increases the chances
of qualifying for funding.

What Else Do IKO Offer?
Short Term Goals: Helping you to obtain funding and assisting with tendering by providing any necessary technical expertise, together with an approved nationwide contractor network.
Long Term Gains: Managing the entire waterproofing solution, planning inspections and maintenance schedules to avoid disruption – all tailored to your particular needs and budget.

Notable Dates

  • September: CIF announced
  • October: CIF information for applicants published
  • October: Online application form opens
  • November: Registration deadline for new applicants
  • December: Deadline for submitting applications
  • April: Target date for notifying successful projects

Roofing (14)

On the basis that a roof is at or above 15 degrees, it is not good practice to overlay existing roof systems. Even those that appear to be in good condition, may have suffered moisture ingress in the past and affect the life expectancy of the new shingle system. On a practical level, lap build up and existing felt detailing at the eaves, verges and ridge positions may impede the installation of the shingle, causing them to not sit flat on the roof. Issues when this occurs can range from unsightly appearance to the uneven seating of the shingle which are then susceptible to wind damage and water ingress.

Category: Roofing

Yes, in warm roof systems, a minimum 13mm thick layer of IKO Permascreed laid on IKO Glass Fibre Tissue separating lauyer will act as an effective VCL.

Category: Roofing

Yes, IKO can provide wind load calculations for the IKO Mach One Insulated System and all other systems. Please contact the IKO Technical Department on 01257 256 864 or technical.uk@iko.com

Category: Roofing

The only roofing solutions that can be installed in ‘wet’ weather are those that are viewed as emergency roof repair compounds such as IKOpro Emergency Roof Repair, with the intention of undertaking further comprehensive or replacement works when the conditions are dry.

Installations in cold weather are dependent on many factors such as the types of IKO products / systems that are being considers and the air and surface temperatures being experienced on-site. For further information on specific product installation parameters please check the Technical Data Sheet (TDS) or contact the IKO Technical Department directly on 01257 256 864 or technical.uk@iko.com

Category: Roofing

We work with IKO Approved Contractors covering the UK. You can find out more information on the IKO Approved Contractors in your local area by either:

1 – Providing your postcode (and we can advise by return)
2 – Contact your local IKO Area Business Manager, details of which can be found by calling 01257 255 771

Category: Roofing

A well designed, maintained and waterproofed flat roof should not cause problems or leak, but how would you know that your flat roof is not watertight or that a problem is just around the corner? There are a number of tell-tail signs to look out for and spotting them early can save time and money:

Roof Deck – Surface

  • Debris accumulation and vegetation growth
  • Warped, sprung or broken wooden boards (wooden deck)
  • Cracks, blistering and wear spots
  • Movement in the roof underweight

Roof Deck – Underside (Wood)

  • Rot
  • Warped boards

Roof Deck – Underside (Concrete / Gypsum)

  • Cracks and stains
  • Spots of rust from reinforced rods
  • Chips or splinters

Roof Deck – Underside (Metal)

  • Rust spots

Roof Lights & Detailing

  • Cracks and chips
  • Leakages around the joints
  • Internal moisture and condensation
  • Build-up of moss and lichen


  • Unintentional damage
  • Puncturing and water ingress
  • Poor maintenance


  • Ponding / standing water (in cold weather ice accumulation)
  • Incorrect or lack of falls
  • Blocked drains and gutters

Flashing, Coping & Jointing

  • Damaged or fragile roof lights
  • General / thermal movement
  • Loose, torn or missing
  • Improper installation and bonding
  • Visible rust indicating a lack of coating
  • Cracks, gaps or damage to the joints


  • Saturated roofing build-up
  • Dampness or mould on the ceiling, walls or within a cavity

Exterior & Interior Walls

  • Settlement cracks
  • Stained, displaced flashing or drainage facilities
  • A white / salt coating or surfacing
  • Damp or stained walls and ceilings (usually brown in colour)
  • Chipped or discoloured paint


  • If the school was built before 2000
  • There are several areas throughout the roofing structure where asbestos can potentially be found

IKO’s Long Term Solution
Remember a flat roof which has been designed and installed in accordance with the relevant British Standards and an IKO long-term solution can be trouble-free, providing it is properly maintained and checked at routine and regular intervals, with a note made of any items requiring attention. Key detail areas to check include flashings, upstands, penetrations, edge trims and drainage channels. Maintaining these checks will extend the life expectancy of the roof.

IKO also consider the longevity and lifetime value of an existing, updated or new roof, partnering with a school to make sure any future upgrades or developments such as solar or photovoltaic (PV) possibilities, increased insulation benefits, accessibility or additional drainage can be achieved and conform to building regulations.

Category: Roofing

The first step to take in preventing moss growth on your roof is to try increase the amount of sunlight it gets. Although this could be difficult with the typical UK weather, you can aid the process by trimming overhanging tree branches that cast constant shadows on the roof. All debris such as leafs and sticks should be removed as soon as possible and gutters must remain well-maintained to ensure that water flows off the roof as fast as possible. A lot of roofers recommend the installation of zinc strips close to the peak as zinc becomes a natural moss killer when it comes into contact with rain water. Copper strips can also be used instead of zinc with a very similar effect. IKOpro Algae and Fungi Remover can also be used on all outside surfaces, including brickwork, tiles, slates, facades, flooring, glasswork, wood, plastics, bitumen shingles and bituminous roofing.

Despite how you choose to address the moss problem on your roof, it is important to always put your own health and safety first. If you are doubtful of your own ability to perform the required tasks, rather enlist the help of a professional roofing company that will be able to carry out the job swiftly and safely while you remain with both feet planted firmly on the ground.

Category: Roofing

Please can you contact the IKO Technical Department to provide a little more detail on this subject matter so that we can help to find a resolution: 01257 256 864 or technical.uk@iko.com

We have dedicated IKO Ares Business Managers in all parts of the country that can help with projects such as this. Please contact the IKO Technical Department in the first instance on 01257 256 864 or technical.uk@iko.com

Categories: Roofing, Specification

You can find the disposal instructions for the Hot Melt PermaTEC Anti-Root System within the Permatec Anti-Root MSDS document on the product page.

IKO Permatec Anti-Root

Category: Roofing

The definition of a Flat roof is 1-10 degrees but can go up to 12.5 degrees. A Pitched / inclined roof is from 12.5 to 85 degrees.

Flat roofing products (2 layer bitumen felt systems) can be used in pitched / inclined roof applications as long as the correct application methods are implemented. However pitched roof, products can only be used down to their designed minimum pitch. This information can be found on the Technical Data Sheets for the variety of IKO Systems and Solutions we offer.

Category: Roofing

Flat roofs are 10 degrees or lower in their pitch, pitched roofs can be anywhere upward of 12.5 degrees. From our range, single layer shed felts should only be used at 20 degrees and upwards, with the laps both mechanically fixed and sealed with adhesive.

Flat roofing waterproofing systems within the merchant realm are multi-layer (underlay and cap sheet) which are bonded to the deck and fully sealed at laps; potentially including a preparation layer dependant on the deck, etc.

Our advice is to follow the guidance of the specific product TDS (Technical Data Sheet) in each situation for guidance on bonding, sealing, etc.

Category: Roofing

The following specification is a possible solution (based on the limited information provided):

Where IKO Permaphalt is required as an exposed paving subjected to foot traffic only, it is laid in two coats to a nominal thickness of 25mm. The first coat is laid to a thickness of 10mm and the second coat 15mm incorporating 15% by weight of coarse aggregate.

Categories: Roofing, Miscellaneous

A roofing system which has been designed and installed in accordance with the IKO recommendations and relevant British Standards can be expected to provide trouble-free service provided it is properly maintained.

With any roofing system it is essential that proper and adequate maintenance is undertaken at routine intervals to ensure long term performance and life expectancy. This is an integral part of the terms and conditions of any guarantee.

IKO Technical Services recommend that any IKO roofing system is inspected and maintained in accordance with the guidelines given in BS8217 : 2005, Clauses 11.3 to 12.2 inclusive. The frequency of inspections will depend upon local conditions, but there should be at least one visit each year. The presence of trees or local atmospheric pollution would suggest more frequent inspections.

During the course of regular maintenance inspections the whole of the roof should be systematically checked and a note made of any items requiring attention. Other than the main roof area, key detail areas to check include flashings, upstands, penetrations, edge trims and drainage channels.

Category: Roofing

Miscellaneous (6)

You would be better going direct to the NFPA (https://www.nfpa.org/) and asking them what they recommend as this is the IKO site in the UK so we wouldn’t be able to provide you with a definitive answer.

Category: Miscellaneous

Unfortunately we do not manufacture any rendering products.

Category: Miscellaneous

For a list of IKO Approved Contractors in the North East region please contact IKO directly in the first instance on 01257 255 771

Category: Miscellaneous

The following specification is a possible solution (based on the limited information provided):

Where IKO Permaphalt is required as an exposed paving subjected to foot traffic only, it is laid in two coats to a nominal thickness of 25mm. The first coat is laid to a thickness of 10mm and the second coat 15mm incorporating 15% by weight of coarse aggregate.

Categories: Roofing, Miscellaneous

Mechanical removal is the only effective way to remove bitumen. However, this may still leave small amounts of residue on the top surface of the concrete and can leave the surface in need of smoothing, etc. after work is completed.

Dissolving or treating with thinners is not advisable as this can lead to several issues, notably contaminated run-off and/or issues of disposal of remnant indeterminate mixtures of liquids.

Category: Miscellaneous

Download the BRE Green Guide Here

The Green Guide is part of BREEAM (BRE Environmental Assessment Method) and is an accredited environmental rating scheme for buildings. It was first published in 1996 and today contains more than 1500 specifications used in various types of building.

The Green Guide’s aim is to provide specifiers with a simple ‘guide’ to the environmental impacts of various building materials. The data used to generate the ratings is based on known information on the latest manufacturing process, the way in which materials are used in buildings, and the relative environmental performance of building materials and components.

The Green Guide examines the relative environmental impacts of the construction materials commonly used in six different generic types building including Commercial buildings (such as offices), Education, Healthcare, Retail, Domestic and Industrial.

The environmental rankings are based on Life Cycle Assessments (LCA), using BRE’s Environmental Profiles Methodology 2008

Materials and components are arranged on an elemental basis so that designers and specifiers can compare and select from comparable systems or materials as they compile their specification.  Roofing materials are one of the major elements covered and, within this area, the Green Guide provides an extensive (but not complete) overview of ratings for materials used within common roof constructions.

Overall system ratings are based on analysis of thirteen core environmental impacts each of these impacts is measured on an A+ to E ranking system, where A+ represents the best environmental performance / least environmental impact, and E the worst environmental performance / most environmental impact.  BRE then uses this data to provide a summary environmental rating – The Green Guide rating.

By evaluating the performance of materials and building systems against the thirteen specific environmental impacts, it is possible for the specifier to select specifications on the basis of personal or organisational preferences or priorities, or take decisions based on the performance of a material against a particular environmental impact.

For further information visit http://www.bre.co.uk/greenguide/

Category: Miscellaneous

Building Regulations (2)

Building Regulations, Part B:2006 (Volumes 1 & 2) make provisions which limit the use, near a boundary, of roof coverings which will not give adequate protection against the spread of fire over them. (The term ‘Roof coverings’ refers to the external layers of the roof but not the roof construction as a whole). The provisions regarding roof coverings are principally concerned with the performance of roofs when exposed to fire from the outside.

The performance of roof coverings is designated by reference to the test methods specified in BS476-Part 3:2004, or in accordance with BS EN 13501-5:2005.

Under BS476, the external coverings of roofs are classified by two letters in the range A-D, with an AA rating being the best. The first letter indicates the time for a standard flame to penetrate to a certain depth in the roof covering, while the second letter is a measure of the spread of flame over a roof surface.

These two-letter ratings are used by the Building Regulations to define minimum separation distances for roofs from adjacent property boundaries, and roof coverings designated as AA, AB or AC are un-restricted in respect this regulation.

The table below (reproduced from Approved Document B) sets out building/boundary separation distances for various categories of fire performance.

IKO’s bituminous membrane systems are tested and certified by Exova Warringtonfire. As a result, the following membranes gained an AA Fire Rating in accordance with the Building Regulations. They are also approved by the LPCB:

  • IKO Ultra Prevent
  • IKO Mach One
  • IKO Safestick
  • IKO Superflex
  • IKO Goldseal
  • IKO ProTorch

For further information, please refer to Approved Document B (2006 Edition): Fire Safety (Volumes 1 &2).

Similar principles to the England & Wales Building Regulations are applied by the Scottish Technical Standards, in respect of roof coverings.

BS476 ratings are used to form ‘Low’, ‘Medium’ and ‘High’ vulnerability categories for the fire performance of roof coverings. These vulnerability categories are then used to designate separation distances between roofs and adjacent boundaries.

Please refer to Section 2.8.1 of the Scottish Technical Handbook for further clarification of these criteria.

Insulation (6)

Yes, IKO enertherm cavity wall PIR insulation can be used in masonry external walls, however there should always be a 50mm residual cavity, never full fill.

Category: Insulation

Yes, we can provide a ‘U’ value calculation for the IKO Enertherm ALU (PIR), to do this you can fill out a request for and send it to enertherm.technical.uk@iko.com

Category: Insulation

The roofing works to be carried out will need to comply with the requirements of Building Regulations 2000, Part L (Revision October 2010) in England & Wales, or The Building (Scotland) Regulations 2004, Section 6 of the Building Standards Technical Handbook in Scotland.

The calculation of thermal transmittance, or U-Values, for a roof is controlled by the above mentioned regulations. There are different procedures according to whether the roofing work is for new-build or refurbishment. Where the refurbishment works is part of a change of use of the building, the works should comply with the latest Building Regulations and any revision thereof.

In all circumstances, it is recommended that advice be sought from your local Building Control Office, as to the compliance requirements for this particular project. The following links offer outline guidance in specific areas:


New Build


Category: Insulation

We would need to know the specific IKO Enertherm board you require as Celotex 75 can be several different boards. If you would like more information please email enertherm.technical.uk@iko.com

Category: Insulation

The short answer is, yes the IKO enertherm ALU Insulation Board is suitable.
Installation of the insulation boards should be over the rafters when possible. Fill all joints with PU foam. Once dry ALU tape can be used to cover the joints to create a damp proof barrier. If you are looking to use the cellar as a living space, you will need to cover it with an fire safe plasterboard.

Please consult a member of the IKO Technical Department before installing:

01257 256 864

Category: Insulation

BRE has assigned generic Green Guide ratings to various types of insulation. These thermal insulation ratings are the same for the following building types:

Domestic, Health, Commercial, Retail, Industrial, Education.

Although a number of different types of thermal insulation may be used within IKO’s roofing systems, rigid urethane polyisocyanurate (PIR) is the major type which would tend to be specified within the vast majority of warm roof build-ups.

Rigid urethane insulation which is pentane blown, and which has a density of 32 kg/m³ has been given a generic Green Guide rating by the BRE of A. IKO’s brand for this type of insulation is Enertherm.

To complement this generic Green Guide rating, IKO Enertherm insulation boards are manufactured in accordance with ISO 14001. Click here to download the certificate.

In addition, IKO Enertherm boards are only ever pentane blown, and therefore have a zero ozone depletion potential. The blowing agent used also has a global warming potential of 0. Click here to download our confirmation letter.

Category: Insulation

Guarantees (2)

Linked guarantees cover the workmanship and material performance elements of a newly installed roof but unlike a single point guarantee, responsibility is split between the materials manufacturer and the installing contractor. Whilst only one guarantee certificate is issued to the client, the contractor will sign the document to cover any labour defects and the manufacturer signs for the material element. Whilst linked guarantees are widely used, there can be responsibility disputes with this guarantee format that can potentially leave the client with an unresolved problem.

The roofing materials will usually be covered by product liability insurance (as in the case of IKO PLC) however, the workmanship element is not usually insured, and reliant on the contractor continuing to trade, should defects need to be rectified. Insolvency insurance to cover workmanship can be arranged but this will usually incurs a separate premium to be paid direct to the insurer by the client.

Category: Guarantees

Single point guarantees are often preferred by specifiers and building owners, as the responsibility for all the elements of the guarantee, including workmanship defects, material quality/performance issues and design input, is placed with the product manufacturer. If there is a problem with the roof during service, the client has only to call the manufacturer to get the matter resolved, regardless of whether the defect is material or workmanship related.

When a single point roofing guarantee is offered by the leading UK manufacturer of roofing and waterproofing materials, as in the case of IKO PLC, the assurance that this provides is of major value, and the additional peace of mind for the client is almost incalculable.

A single point guarantee can be a major factor in maximising the rental value of a property, as potential tenants will know that any roof problems will be rectified quickly. In addition, as the guarantee is fully transferable to a new owner, a single point guarantee can also have a significant and positive impact on the final sale value of a property.

In addition, the single point guarantee offered by IKO PLC is insurance backed, making it one of the best the best all round guarantee packages available on the market.

Category: Guarantees

Car Parks (1)

Car parks offer the simplicity of leaving your car somewhere that should be safe and secure, but in order to keep the actual structure safe, secure and waterproof the build-up and structures are far from simple.

As they are high level trafficked areas, car park decks (especially the top deck and open areas) can be exposed to unforgiving influences such as seasonal change, fuel, carbon dioxide, oil, water, heavy vehicle traffic and even the chemicals form such products as de-icers. These elements can become particularly hazardous if the waterproofing system fails, offering diminished protection to the integrity of the building.

IKO offer a range of car park waterproofing systems (including liquids and mastic asphalt), that are easy to install and provide durability as well as a protective waterproofing solution to increase the lifespan of any type of car parking facility. For levelling solutions, IKO can also provide IKO Permascreed, which is a screeding solution that cures within one hour.

Category: Car Parks

Safety (1)

Product specific fire-fighting measures form part of the Material Safety Data Sheets. Please refer to the specific products MSDS documentation for the correct type of fire-fighting media.

Category: Safety

Liquid Waterproofing (2)

It is recommended that you thoroughly stir the IKO felt adhesive ensuring a full working of the liquid in the tin before use.

Please can you contact the IKO Technical Department to provide a little more detail on this subject matter so that we can help to find a resolution: 01257 256 864 or technical.uk@iko.com

Structural Waterproofing (4)

This is very difficult to explain via text. Please contact the IKO Technical Department for further assistance: 01257 256 864 or technical.uk@iko.com

Both IKOpro Synthaprufe Original and IKOpro Synthaprufe Trade are blended bitumen emulsion and synthetic rubber latex, and subject to correct detailing can be used as damp proofing solutions. Only IKOpro Synthaprufe Original carries 3rd Party Accreditation, covering an additional use for below ground tanking systems designed to conform to the requirements of BS8102:2009.

If you need to download a Technical Data sheet for a specific IKO product, simply go to the individual product page and click the Technical Data Sheet link. This will then automatically start to download. Alternatively, visit the TDS section under the Resources heading on the website and search for the specific Technical Data sheet you require.

All available Technical Data Sheets can be found on the individual product pages as well as in the TDS section of the website under Resources. If further assistance is required, please contact the IKO Technical Department – technical.uk@iko.com (01257 256 864)

Highways & Civils (5)

The IKO Pacopatch ironwork reinstatement system is installed by one of our approved installer. All our approved installers have been through our IKO training program to ensure quality installations.

If you want to become part of our IKO Pacopatch network of approved installers get in touch now!

Enquiry Form

Once the ironwork is bedded, IKO Pacopatch infill and surfacing can be installed in 20 min.

IKO Pacopatch Ironwork Reinstatement Installation Video

If correctly designed and installed the IKO Pacopatch road ironwork reinstatement system should outlast the surrounding road structure.

Enquiry Form

IKO Pacopatch is a mastic asphalt material which is CE Marked in accordance with BS EN 13108-6 : 2016

Download a copy of the certificate:
Certificate of Conformity of the Factory Product Control 0836–CPR–14/F082

The RSTA ADEPT Code of Practice for Ironwork Systems Installation and Refurbishment document states that: “the installation of the Polymer Modified Mastic Asphalt must be in line with the manufacturer’s instructions and must also conform to the requirements of the Specification for the Reinstatement of Openings in Highways (SROH). It is recommended that Polymer Modified Mastic Asphalt used in ironwork installation should be CE Marked to EN13108-6 or have HAPAS or equivalent product certification and the certificate should be sought from the manufacturer“.
Read more

Enquiry Form

IKO Pacopatch ironwork reinstatement system offers a 5 year material guarantee for a long-lasting installation.

Enquiry Form

Specification (1)

We have dedicated IKO Ares Business Managers in all parts of the country that can help with projects such as this. Please contact the IKO Technical Department in the first instance on 01257 256 864 or technical.uk@iko.com

Categories: Roofing, Specification

Bituminous Membrane (1)

It is recommended that you thoroughly stir the IKO felt adhesive ensuring a full working of the liquid in the tin before use.

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