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Posts tagged ‘thatchfireprevention’

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Hampshire Thatchsayf

Easton

The recent good weather saw TAS out and about spraying thatched roofs across the country with their Thatchsayf Fire Retardant Spray System. First stop was Hampshire for a pair of lovely semi-detached cottages. The thatching was carried out by Ed Goodall last year. During the thatching TAS also installed the Thatch Alert chimney heat monitor system to both chimneys.

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Thatchsayf used on Maudslay Park newbuild

Maudslay Park

TAS recently carried out the application of its Thatchsayf Fire Retardant Spray System to a new build property, which is part of the Maudslay Park development – a new Retirement Village in the Warwickshire village of Great Alne. The thatched property is intended to be a shop for the village and provide warden accommodation. The roof which is approximately 210m² – 22 thatchers’ sq was thatched by Parkinson Master Thatchers.

Prior to the thatching, the roof benefited from the installation of the Thatch Fireboard Protection System comprising TAS100 Thatch Fireboards and 100mm of Thatchbatts®.

The application of the fire retardant was partly carried out using a boom lift (cherry picker). TAS operatives are licenced to operate boom and scissor lifts, which can often reduce the time it takes to treat a roof and also ensures close contact with the thatch. This also allows for greater control and coverage when treating the roof. You can see from this image where the Thatchsayf has already been applied.

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Thatchsayf – spraying season begins

HSG - thatch...

With the albeit brief start of summer, TAS recently kicked off their fire retardant spraying season on a lovely roof in Hinton St George, Somerset.

The new roof which was thatched by local thatcher Andrew Wright, saw a seamless continuation of the existing thatch and formed part of wider refurbishment works and an extension to the whole property.

The entire thatch roof is around 150m² – 16 Thatchers’ sq.

The building and refurbishment works are being carried out by Building Craftsmen (Yeovil) Ltd.

When treating new thatch it may not be apparent how much fire retardant is being applied. However, when existing thatch is treated it becomes quite clear how much fire retardant is actually applied.

Please click on the link below to see examples of the Thatchsayf Spray System being applied to both new and existing thatch.

https://goo.gl/kWjVbB

The airless sprayer used to apply the fire retardant is set at a certain pressure to ensure that not only the surface of the thatch is protected but also the stems of the thatch up to a depth of 75mm or more. This means that even though there will be natural degradation of the thatch itself, there will still be an element of protection for around five years.

The best way to apply the Thatchsayf is with a specialist airless sprayer and at a fairly close distance from the thatch. This allows for greater control and coverage when treating the roof.

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Unique thatched project – Enterprise Centre

Following our epic journey to the Isle of Harris in July, TAS then embarked on another unusual project after we were approached by Master Thatcher – Stephen Letch for our thoughts on treating a unique thatched building in Norfolk with our Thatchsayf fire retardant spray system.

We were aware of a project at the University of East Anglia (UEA) in which Stephen and his team of thatchers had been busy carrying out ‘vertical’ thatching to the walls of the Enterprise Centre. Stephen then confirmed that this was indeed the project.

Please click on the thumbnail images to view the full size images and slide show.

 

 

 

 

 

 

 

 

 

The project incorporated a unique thatch cassette cladding system which had not been used anywhere in the world. The process saw 294 individual cassettes thatched off-site using straw from the Norfolk/Suffolk borders. The thatch cassettes were then transported to site and erected onto the façade of the building.

Please click on the links below for a couple of great videos showing the thatched cassettes and cladding take shape:

https://www.youtube.com/watch?v=V7NyuO_z-84

https://www.youtube.com/watch?v=kEA_25II144

We were initially invited to the centre by the Project Director from main contractor Morgan Sindall and the Lead Architect from Architype to carry out a trial application of the Thatchsayf to a small sample area of the thatch as questions were raised about discolouration to the thatch. Once satisfied, both parties instructed us to carry out the application to the entire thatched façades – around 1,000m² or 108 thatchers’ square.

Gary and Stuart from TAS then spent the best part of a week carrying out the application using cherry pickers and their specialist spraying equipment.

 

 

 

 

 

 

 

 

 

The Enterprise Centre, which is a Passivhaus and BREEAM Outstanding building, is the greenest in Britain and one of the most sustainable buildings in Europe.

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U-Values & Condensation in thatch

Thatch Roof Rafters

U-Values & Condensation in thatch
Modern living under thatch has changed in the last 10 to 15 years, with the introduction of modern central heating, double/secondary glazing, power showers and more home owners wanting fully vaulted ceilings. In addition, the requirements and associated recommendations from Building Control and insurance companies see the requirement for fire barriers and increased levels of insulation to be installed within the roof structure.

All these areas can have an effect on the performance of thatched buildings, therefore all components of the roof structure need to be built into U-Value calculations/reports.

U-Values are expressed in units of watts per degree of temperature difference W/m²K. Overall U-Values will vary according to actual thickness and density of the thatch. For example:

  • 300mm thickness of Water Reed – 0.29 W/m²K
  • 300mm thickness of Long Straw – 0.23 W/m²K

For comparison, the standard in Part L of the Building Regulations (2010) for replacement roof insulation at rafter level is 0.18 W/m²K.

A suitable insulation product to help achieve a U-Value of 0.18 would be Thatchbatts® as they are non-combustible, high density slabs which also offer additional protection in terms of fire resistance.

Vapour Control
It is widely accepted in the construction industry that in addition to sufficient levels of insulation, vapour control layers are required to control vapour and reduce the risk of condensation. A correctly fitted vapour check will also play an important part in the way the building continues to perform in the long term.

Bespoke U-Value & Condensation Risk Analysis reports can be generated for thatched roofs and will take into account the design and construction, type of materials used and location within the country.

See the Thatching Advisory Services website for further information and product details.

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Thatching Advisory Services – New Website

Thatched cliff-top shelter overlooking Seaton beach

Thatching Advisory Services (TAS) recently launched it’s new website. The new site contains the latest information on fire protection as well as comprehensive advice on buying, owning and maintaining thatched properties. There is a new section devoted to new builds and extensions which includes detailed information on roof construction and the latest building regulations.

There is comprehensive information on all our products and systems and a new facility to buy the products via our online shop.

Have a look around the site and feel free to contact us with feedback or if you have any further questions or queries.

www.thatchingadvisoryservices.co.uk

 

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Thatchsayf – Thatched Cottage

Thatched Cottage - front

Thatching Advisory Services, whilst taking advantage of the recent warm weather, continued their busy schedule of treating thatched roofs with Thatchsayf fire retardant with a comprehensive application carried out to the roof of the Thatched Cottage  in Shedfield, Hampshire.

The 220m² roof was treated with clear Thatchsayf.

For further details about Thatchsayf fire retardant, please give us a call on 08455 204060.

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Thatchsayf – Stream Cottage

 

 

 

 

 

 

 

 

 

 

 

 

Thatching Advisory Services recently completed the application of Thatchsayf fire retardant to Stream Cottage in Glynde, East Sussex.

The Grade II listed cottage is one of the oldest in the Glynde parish, dating back to 1556.

Prior to the new thatch, the roof structure also had TAS100 Thatch Fireboards and Thatchbatts® installed.

The 127m² roof was thatched by Gavin MacDonald Master Thatcher

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Thatchsayf – Bilbrook Cottage

Bilbrook Cottage - front

Thatching Advisory Services have been out and about recently treating a number of thatched roofs with their fire retardant – Thatchsayf.

Mid-July saw Gary go off to Portadown in Northern Ireland where Master Thatchers (North) Ltd recently completed a full re-thatch of the roof at Bilbrook Cottage.

The cottage, which is one of Portadown’s oldest – dating back to 1642 – was extensively damaged by fire in April 2013.

The cottage also had TAS100 Thatch Fireboards and Thatchbatts® installed prior to the thatching taking place.

The 230m² roof was treated with clear Thatchsayf.

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TAS asked to write for Listed Property Owners Club Magazine

Rob Norcott of Thatching Advisory Services was asked by Listed Property Owners’ Club Ltd.  to write an article for latest magazine.

Listed Heritage Magazine is published by the Listed Property Owners’ Club for their members. This is a full colour, perfectly bound A4 production; it is published bi-monthly and distributed to 19,000 listed property owners. The Listed Heritage Magazine includes amongst other things: suppliers directory, members letters, shopping pages, events and properties for sale.

The 4 page piece was centered around the importance of separation in construction on thatched roofs. The article also takes you through common causes of thatch fires, from old or faulty electrical systems through to bonfires or fireworks. It also discusses the various systems and preventive measures available such as Thatch Fire Board System, Thatch Fire Wall System; the use of Thatchbatts® and the Thatchsayf spray.

To see the full article click the link below:

TAS article for Listed Heritage – Issue 95

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