EcoVadis: Hambleside Danelaw in top 5%

Introducing ThinVerg®

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  Danelaw Compatibility Charts

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Hambleside Danelaw – Recognised for More Innovative Products

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  The InVerg® was released in 2020 – a year remembered for things other than innovative roofing products! – and has now been installed on over 1500 properties across the UK.  Compatible with most plain tiles, both single and double lap, InVerg® features a patented design which offers improved weather and wind resistance (GB Patent No. 2586153).  Contractors have unanimously commented on the improved ease and speed of installing InVerg® compared to traditional mortar bedded plain tile types.

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  SwiftRidg®, launched at the start of 2024, comprises of a unique omega-shaped GRP profile and a fixing kit.  The patent pending GRP system can withstand wind speeds of over 110mph while offering an alternative to roll-top ridges made from metals such as lead, zinc and tin (Patent Application No. 2308115.1).  Hambleside Danelaw also manufacture the SwiftRidg®+, a kit which includes a corrugated roll.  When installed underneath the roll-top profile, the addition of the roll results in ventilation at ridge level.  The SwiftRidg® presents an incredible opportunity for roofers: bridging the skills gap associated with lead, removing the risks associated with metal roll-top systems (which, like lead, have scrap value), as well as being a viable option for water harvesting systems unlike metals which have contaminated water run-off.

GRP rooflights have a service life of around 30 years with correct care and maintenance, this means that at the end of that service life – where the building is still in use – they will need to be replaced.  Zenon’s National Sales Manager Paul Hanratty, and HDL newly-appointed sales manager for North England and Scotland, Danny O’Brien, went on a site visit to see a rooflight replacement as part of a refurbishment project in Northamptonshire in conjunction with Hallmark Roofing & Cladding.

Heading up to the roof, the difference in the old rooflights compared to the new was evident.  There is no doubt that these new Zenon rooflights will increase the light transmission into the building.

Danny stated that it was a “very interesting visit – to be able to see our products being installed and reaching the end user brought into sharp focus the need for quality GRP rooflights in these types of industrial spaces.

Seeing older material which hasn’t been treated or maintained, which now must be replaced to improve the space also gave me an overall idea of why it is important to maintain rooflights for a longer life span on the material along with a better aesthetically pleasing application.

Being able to walk around the site and understanding the installation process of the rooflights also an added value and understanding to why it is paramount material is correctly produced and profiled to fit within the metal cladding system.”

Hambleside Danelaw, as members of The Rooflight Association, are well aware of the benefits of natural daylighting and are committed to raising awareness of specifying rooflights which contribute to the daylighting in the building.  Appropriate maintenance of rooflights such as cleaning and eventual replacement are also of vital importance when considering the specification process.

If rooflights on an industrial or commercial building need replacing, it is important to make this a priority as the non-fragility of the rooflight could be compromised.  To replace in-plane rooflights the only information needed is the profile type as well as the manufacturer and length needed.  If you need assistance identifying the profile, please get in touch with our team on 01327 701 920 – we would be happy to help.

Hambleside Danelaw gathered together to celebrate the Queen’s Platinum Jubilee.  Staff from across the company (or at least the ones not on holiday!) were treated to two cakes; one tasting of milk chocolate, and the other two-tiered cake was white chocolate & raspberry and lemon & poppy-seed.  Both beautiful cakes were made by Kim Killips, sales co-ordinator by day and cake-baker extraordinaire by night!

Hambleside Danelaw recently welcomed two new members of staff who will be assisting in the Dryseal division.  In order to develop their knowledge of the single ply flat roofing system, they were given the opportunity to undertake our approved contractor training alongside experienced roofers also learning how to install the system.

The new Business Development Manager, Dan Addley said that the course is “good mix of interactive practical and classroom learning that can be tailored to meet the knowledge base of the individuals on the Dryseal course.

Paul Lambert is great at what he does and makes sure that the course is inclusive for all with no one left out & offers help where needed usually without the need to ask for it, it must be his sixth sense!

Over the two-day course, attendees learn all aspects of the Dryseal system including laying of the field areas, trim installation, the detailing required on corners, upstands etc, how to correctly mix catalyst, how to apply the top coat and most importantly safe ways of working.

Where needed, advice can be given on estimating and how to correctly work out which components are needed for the installation.

Overall, I would highly recommend anyone wishing to further their roofing knowledge to attend one of our courses.”

Nicoleta, our Business Administrating apprentice, said:

“I’ve had the great opportunity to take part in the two-day Dryseal training offered by Hambleside Danelaw. Paul has a really good way of explaining information which helps with retaining it. I think the contractors really enjoyed their training days and learnt a lot in the process.

Once we got to the practical part of things, Paul demonstrated how to fit a smaller rig and then gave us the opportunity to do the same thing to our own rigs. I had never used an electric saw and getting shown and trained on how to use that was nerve-racking and exciting!

I had a lot of fun fitting and measuring the pre-cured parts and fitting them together like a jigsaw puzzle to make up the first part of the system. I learnt how catalyst is used and what happens when put together with resin and the topcoat.

The second day we all got assigned a bigger rig and given the opportunity to go through the whole procedure of laying a Dryseal roof.

Overall, it was really good fun the contractors on the course were also very friendly. Dan Addley (Business Development Manager for Dryseal) and I were the last to do our finishing touches on the rig before the topcoat and one of the contractor companies joined in and helped us finish, which was very kind of them.”

Find out more about Dryseal flat roofing system

To learn more about Dryseal’s Approved Contractor training, get in touch with us on 01327 701930 or get in touch with us using our contact form.

Back to Basics: What are the ventilation requirements for cold and warm pitched roofs?

Stopping condensation and moisture from developing in pitched roofing is imperative when seeking to prevent mould and damp. Approved Document C2 states that “Roofing can be designed to protect a building from precipitation either by holding the precipitation at the face of the roof or by stopping it from penetrating the back of the roofing system” (6.3).  This means that the building must be designed using appropriate overlapping barriers such as tiles and tile underlay.

Approved Document C2 also requires that roofs be designed and built so that their thermal and structural performance are not negatively affected by interstitial condensation. Condensation can be formed through improper ventilation and insulation.

Insulation is installed in buildings to prevent undue heat loss.  Depending on where insulation is installed, the building could have a warm or cold roof.  Insulation positioned closely above, between or below the rafters forms a ‘warm’ or ‘hybrid’ roof, whereas insulation installed horizontally at ceiling level will create a cold roof.

The modern building is designed to keep warm air in, with standard features such as double glazing and thicker insulation meaning that heat retention and energy efficiency are prioritised.  This results in a variance of air temperatures and pressures.

Tumble-dryers, kettles, even breathing adds to the water vapour in the air, also increasing the vapour pressure.  The warmer the air, the greater capacity there is to contain moisture. Gaps leading to the loft space, whether in the form of light fittings or hatches allow this warm air to reach the cold surface under the roof, resulting in condensation.  Condensation can damage timber rafters and cause damp and mould to develop.

Cold Roof Insulation Requirements

In a cold roof design, generally internal roof moisture needs to be allowed to exit the building, otherwise it would condense in the roof space. This can be done through ventilation openings located at the eaves over a fascia, through a soffit or at a brick corbel, at low or high level through the roof surface using slate or tile ventilators, or at high level using a mechanically fixed dry ridge and hip systems such as Hambleside Danelaw’s CON6+.

A combination of solutions to meet requirements specified will ensure that moisture has a way to exit the building.  All of Hambleside Danelaw’s vents are designed to keep large insects and birds out, while maintaining airflow in the roof space.

Hambleside Danelaw produce a wide range of roof surface ventilators for slates and tiles that match most common tile profiles, all listed in our compatibility chart for roofing accessories. Our vents are acid rain resistant, come with UV stabilisation for durability, and are thermally stable.

They can also be connected to pipework or ductwork and used as terminals for soil pipe ventilation and mechanical extraction delivering a very discreet solution.

Warm Roof Insulation Requirements

A warm roof is designed to prevent any moisture from forming on cold surfaces in the roof construction.  This means that warm roofs do not generally require ventilation, but there should be an Air & Vapour Control Layer (AVCL) or vapour barrier on the warm side of the insulation depending upon the detailing.  This prevents the passage of warm, moisture-laden air to the colder uninsulated parts of the roof.

A warm roof can also be formed incorporating a ventilated gap between the roof tile underlay and insulation layer.

Underlays

Ventilation can also be provided by using an underlay, which can be installed with other methods of ventilation.  Underlay use needs to be considered in the tile-fixing specification as there may be increased wind loading on the tiles when using air permeable types

Underlays are fixed underneath the roof tiles and can be classed as either HR (High Resistance) or LR (Low Resistance), their classification depends on the level of vapour resistance.  When using HR underlays pitched roofs should have ventilation openings at eaves level equal to a 10mm wide opening and running the full length of the eaves to promote cross ventilation. For pitches above 35^o or roof spans in excess of 10 metres, a 5mm continuous opening should be provided at the ridge.  Increased ventilation openings are needed if the insulation follows the pitch of the roof for part or all of the rafter length.

LR underlays, in accordance with BS 5250, will allow for a reduction in the area of the eaves ventilation openings. This is dependent upon how well sealed the ceiling is, and on the air-openness of the type of roof covering above the underlay.  When using a Low Resistance underlay as well as AVCL on the warm side of the insulation, it may be that no ventilation will be needed to be used in the roof construction.

When using either HR or LR underlays the ventilation requirements for the roof space should be considered for the best solution for the building design.

The actual ventilation requirements will always depend on a combination of other factors including the pitch and span of the roof.

If you want to hear more about Danelaw’s roofing ventilation range or arrange a CPD seminar about ventilation designs and solutions for pitched roofs, get in touch with us at marketing@hambleside-danelaw.co.uk.

Thanks for reading the first of our Back to Basics series, look out for more articles from Hambleside Danelaw.

Fire Marshals are a legal requirement for any business, and with some staff changes over the last 6 months here at Hambleside Danelaw, we needed to ensure that we have full cover for both of our buildings.

The business needs to a have robust evacuation procedures in place and we needed to ensure that all our people are safe and accounted for in the event of a Fire Evacuation. We asked for volunteer marshals and the response was very positive. With the training we succeeded in replacing/adding to the competent persons list. They will now be designated areas within the business to monitor and sweep during a fire evacuation.

The training took place on 11 October, and the attendees were: Fabiola Pedelty, Tim Willis, Will Brooks, Paul Hammill, Vince Merricks, Zdenek Galas, Wayne Nixon and Michael Martin. Well done to all those who took part.