Sustainable construction

Sustainable construction
Machine Profile Log Sustainable construction

Machine Profile Log (MPL) Buildings
This module is a follow-on from the Solid Timber Buildings module. It is understood that the reader already has an awareness of the benefits of Solid Timber Construction.

This module is a follow on from the Solid Timber Buildings module. It is understood that the reader already has an awareness of the benefits of Solid Timber Construction. We will introduce the specification of MPL buildings and help specifiers to learn more about the design benefits and any potential limitations.

We will look at the following areas Sustainability

We will look at the following areas Sustainability Specification

We will look at the following areas Sustainability Specification U Values

We will look at the following areas Sustainability Specification U Values Air Tightness

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance Site Waste

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance Site Waste Construction time

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance Site Waste Construction time Difficult Access

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance Site Waste Construction time Difficult Access Limitations

We will look at the following areas Sustainability Specification U Values Air Tightness Fire Resistance Site Waste Construction time Difficult Access Limitations Benefits

Sustainability Everything about an MPL building is geared towards sustainability including;

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials Sustainability – low CO₂ cost

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials Sustainability – low CO₂ cost Sustainability – Life of Building

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials Sustainability – low CO₂ cost Sustainability – Life of Building Sustainability – designed for deconstruction

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials Sustainability – low CO₂ cost Sustainability – Life of Building Sustainability – designed for deconstruction Breeam Compliance

Sustainability Everything about a MPL building is geared towards sustainability including; Sustainability – Materials Sustainability – low CO₂ cost Sustainability – Life of Building Sustainability – designed for deconstruction Breeam Compliance Carbon Positive Buildings

Sustainability - Materials
High percentage of materials used are timber

High percentage of materials used are timber Timbers and timber based components can be provided with FSC/PEFC Chain of custody

High percentage of materials used are timber Timbers can be provided with FSC/PEFC Chain of custody Off site manufacture/precision engineering reduces waste and site CO₂

High percentage of materials used are timber Timbers and timber based components can be provided with FSC/PEFC Chain of custody Off site manufacture/precision engineering reduces waste and site CO₂ Waste timber is well managed both in manufacture and on site

High percentage of materials used are timber Timbers and timber based components can be provided with FSC/PEFC Chain of custody Off site manufacture/precision engineering reduces waste and site CO₂ Waste timber is well managed both in manufacture and on site No Wet Trades (plaster / cement etc)

High percentage of materials used are timber Timbers and timber based components can be provided with FSC/PEFC Chain of custody Off site manufacture/precision engineering reduces waste and site CO₂ Waste timber is well managed both in manufacture and on site No Wet Trades (plaster / cement etc) A fully recyclable building envelope

Question; No need to use plaster or render in an MPL building.
True or False

False Are you Sure? MPL buildings have a natural timber finish on both the internal and external walls. Meaning no wet trades including plastering /rendering /painting are required. This saves time as there is no need to wait for curing / drying. It also has a posive impact on Health and Safety, particularly in the context of COSHH. Try again?

True. MPL buildings have a natural timber finish on both the internal and external walls. Meaning no wet trades including plastering /rendering /painting are required. This saves time as there is no need to wait for curing / drying. It also has a posive impact on Health and Safety, particularly in the context of COSHH.

Sustainability – Low CO₂
Embodied CO₂ within main construction material – timber

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular.

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular. Very Low use of site machinery – reducing emissions

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular. Very Low use of site machinery – reducing emissions Fewer deliveries as a result of off site manufacture

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular. Very Low use of site machinery – reducing emmissions Low site waste – fewer deliveries/collections

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular. Very Low use of site machinery – reducing emmissions Low site waste – fewer deliveries/collections High percentage of waste recycled

Embodied CO₂ within main construction material – timber Off site manufacture, with rapid on site construction means far fewer transport loads per m² of building when compared to traditional modular. Very Low use of site machinery – reducing emissions Low site waste – fewer deliveries/collections High percentage of waste recycled Potential to use local trades to further reduce CO₂ from workers’ transport

Sustainability – Life of Building
Low Maintenance;

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required.

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through:

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through: High insulation and low U values

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through: High insulation and low U values Low Air pressure test results

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through: High insulation and low U values Low Air pressure test results Low Energy Heating and Lighting systems (variable)

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through: High insulation and low U values Low Air pressure test results Low Energy Heating and Lighting systems (variable) Quality Windows and Doors

Low Maintenance; Siberian Larch cladding is a low maintenance timber with long lifespan. No treatment required. High quality internal timber finish also reducing need for ongoing decoration Energy Efficiency through: High insulation and low U values Low Air pressure test results Low Energy Heating and Lighting systems (variable) Quality Windows and Doors Potential for Carbon Neutral/Positive when specified with a Solar Array

Sustainability - Deconstruction
Increasingly, Specifiers have to consider the impact of the building at the end of its useful life. MPL Construction can offer these advantages;

Increasingly, Specifiers have to consider the impact of the building at the end of its useful life. MPL Construction can offer these advantages; Long lifespan of 80 years plus

Increasingly, Specifiers have to consider the impact of the building at the end of its useful life. MPL Construction can offer these advantages; Long lifespan of 80 years plus Fully recyclable building envelope

Increasingly, Specifiers have to consider the impact of the building at the end of its useful life. MPL Construction can offer these advantages; Long lifespan of 80 years plus Fully recyclable building envelope Natural materials – low embodied energy

Question; Do MPL Timber buildings have a long lifespan of over 80 years? True or False

False Are you Sure? Timber Buildings have a long lifespan – the external cladding alone (Siberian Larch or Western Red Cedar) can last in excess of 60 – 80 years. The main structure considerably longer. Try again?

True. Timber Buildings have a long lifespan – the external cladding alone (Siberian Larch or Western Red Cedar) can last in excess of 60 – 80 years. The main structure considerably longer.

Breeam The buildings have been designed to meet/or exceed Breeam standards and are rated “very good” even before local conditions are considered.

Breeam The buildings have been designed to meet/or exceed Breeam standards and are rated “very good” even before local conditions are considered. Breeam “Excellent” or even “Carbon Positive” status is readily achievable with the addition of a solar array or other renewable energy source.

Carbon Positive Weatherworks, Energy consultants, were commissioned by Cabinco to assess efficiency of our buildings and have reported that our standard specification can achieve Carbon Neutral or even Carbon Positive with the addition of a solar array.

Carbon Positive Weatherworks, Energy consultants, were commissioned by Cabinco to assess efficiency of our buildings and have reported that our standard specification can achieve Carbon Neutral or even Carbon Positive with the addition of a solar array. This is based on air tightness of 3m³/hr at 50Pa or below and our existing excellent U values.

Question; An MPL building can achieve Carbon Positive/Neutral energy consumption based on air pressure test results of 3m³/hr at 50Pa True or False

False Are you Sure? Weatherworks (Energy consultant) were commissioned by Cabinco to assess efficiency of our MPL buildings they reported that our standard specification can achieve Carbon Neutral or even Carbon Positive with the addition of a solar array based on air tightness of 3m³/hr at 50Pa or below and our existing excellent U values. Try again?

True. Weatherworks (Energy consultant) were commissioned by Cabinco to assess efficiency of our MPL buildings they reported that our standard specification can achieve Carbon Neutral or even Carbon Positive with the addition of a solar array based on air tightness of 3m³/hr at 50Pa or below and our existing excellent U values.

Specification - Wall Machine profile Log buildings all have a structural shell constructed from solid log walling. This log can vary in thickness – but usually 75mm as a minimum.

Specification - Wall Machine profile Log buildings all have a structural shell constructed from solid log walling. This log can vary in thickness – but usually 75mm as a minimum. These logs form the Internal log walls which are protected from the elements by the sacrificial external cladding: increasing longevity.

Specification - Wall Machine profile Log buildings all have a structural shell constructed from solid log walling. This log can vary in thickness – but usually 75mm These logs form the Internal log walls which are protected from the elements by the sacrificial external cladding: increasing longevity. The wall log is laminated to reduce shakes and splits, and improve performance and appearance

Specification - Wall Machine profile Log buildings all have a structural shell constructed from solid log walling. This log can vary in thickness – but usually 75mm as a minimum. These logs form the Internal log walls which are protected from the elements by the sacrificial external cladding: increasing longevity. The wall log is laminated to reduce shakes and splits, and improve performance and appearance Wall log will normally have triple T&G to both improve air tightness and stability of the wall.

Specification - Wall Machine profile Log buildings all have a structural shell constructed from solid log walling. This log can vary in thickness – but usually 75mm as a minimum. These logs form the Internal log walls which are protected from the elements by the sacrificial external cladding: increasing longevity. The wall log is laminated to reduce shakes and splits, and improve performance and appearance Wall log will normally have triple T&G to both improve air tightness and stability of the wall. Logs interlock to create the structural shell.

Question; All timber cladding requires regular treatment to preserve it from the elements True or False

True. Are you sure? Some types of timber such as Siberian Larch and Western Red Cedar are naturally weather resistant. They cope with the elements without decay for 60 – 80 years and gradually turn an attractive silver grey. These are most commonly used on MPL Buildings Try Again?

False Some types of timber such as Siberian Larch and Western Red Cedar are naturally weather resistant. They cope with the elements without decay for 60 – 80 years and gradually turn an attractive silver grey. These are most commonly used on MPL Buildings

Specification Typical wall log

Specification – Wall The 75mm wall log which creates the structural shell is also the finished inner wall. Log thickness can be increased if required

Specification – Wall The 75mm wall log which creates the structural shell is also the finished inner wall. Log thickness can be increased if required Insulation, breather and cladding is added to the exterior to create the finished wall section.

Specification – Wall The 75mm wall log which creates the structural shell is also the finished inner wall. Log thickness can be increased if required Insulation, breather and cladding is added to the exterior to create the finished wall section. This enables services to be hidden in the cavity.

Specification - Wall External Cladding can be provided in a variety of different finishes.

Specification - Wall External Cladding can be provided in a variety of different finishes. However, most clients are looking for sustainability and therefore select Timber Cladding in either Western Red Cedar or Siberian Larch in 22mm

Specification - Wall External Cladding can be provided in a variety of different finishes. However, most clients are looking for sustainability and therefore select Timber Cladding in either Western Red Cedar or Siberian Larch in 22mm These cladding types do not require preservative treatment, will weather naturally to an attractive silver grey colour, and last 60 – 80 years plus

Specification - Wall External Cladding can be provided in a variety of different finishes. However, most clients are looking for sustainability and therefore select Timber Cladding in either Western Red Cedar or Siberian Larch in 22mm These cladding types do not require preservative treatment and will weather naturally to an attractive silver grey colour and last 60 – 80 years plus As an external cladding, it can replaced without internal disruption. This also affords ready access to services without disturbing the occupants.

Specification Roof The roof structure can be designed and constructed to accept a variety of final finishes; including Sedum/Wildflower, slate or Metrotile.

Specification Roof The roof structure can be designed and constructed to accept a variety of final finishes; including Sedum/Wildflower, slate or Metrotile. The MPL system allows great flexibility throughout, including the roof.

Split Roof Design allowing natural light into the central corridor of this classroom block

Roof Specification - monopitch

Sedum Roof at Deanfields Study Centre

Specification Foundations
We can build from a variety of foundations including strip, block pillars, insulated slab, CFA piles, screw piles; dependant on ground conditions, budgets and timescales etc.

Specification Foundations
We can build from a variety of foundations including strip, block pillars, insulated slab, CFA piles, screw piles; dependant on ground conditions, budgets and timescales etc. Foundations, most often pad/pile type, are designed at the same time as the building; specifying number and position of all load points.

Screw Piles offer less site disruption, better sustainability value (removable and recyclable), precision and speed.

Pillar foundations can be more cost – effective
Pillar foundations can be more cost – effective. Image shows them complete and ready for baseframe.

Typical Floor Specification

Windows/Doors Superior Scandinavian designed double glazed units

Windows/Doors Superior Scandinavian designed double glazed units
Manufacturer’s 5 year guarantee

Manufacturer’s 5 year guarantee External windows and doors glazed Argon filled low "E" glass

Manufacturer’s 5 year guarantee External windows and doors glazed Argon filled low "E" glass All doors use toughened/laminated glass

Manufacturer’s 5 year guarantee External windows and doors glazed Argon filled low "E" glass All doors use toughened/laminated glass Arrive on site as factory finished, fully glazed, pre-hung sets, ready to install.

Windows and Doors in a light Oak coloured finish

Architect specified matching RAL to fascia, rainwater goods and windows and doors

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values;

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values; 125mm Kingspan insulation U Value 0.16

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values; 125mm Kingspan insulation U Value 0.16 Wall thickness 265mm

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values; 125mm Kingspan insulation U Value 0.16 Wall thickness 265mm 150mm Kingspan insulation U Value 0.14

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values; 125mm Kingspan insulation U Value 0.16 Wall thickness 265mm 150mm Kingspan insulation U Value 0.14 Wall thickness 290mm

U Values - Wall This build system provides high levels of thermal efficiency and will provide the following U Values; 125mm Kingspan insulation U Value 0.16 Wall thickness 265mm 150mm Kingspan insulation U Value 0.14 Wall thickness 290mm There is flexibility in the system to change insulation thickness and type where appropriate.

Question; MPL buildings substantially improve on Building Regulations U values for all elements of the building. Typical U Values for a wall is with 125mm solid board insulation. True or False

False Are you sure? With a combination of 75mm wall log, 125mm solid board insulation and 22mm external timber cladding an MPL building will achieve U Values for a wall of 0.16 A substantial improvement on the Building Regulations Requirements. Try again?

True. With a combination of 75mm wall log, 125mm solid board insulation and 22mm external timber cladding an MPL building will achieve U Values for a wall of 0.16 A substantial improvement on the Building Regulations Requirements.

Fire Resistance Timber has a slow charring rate of between 15 – 25mm per half hour (depending on species) therefore structural integrity remains stable for longer and is more predictable.

Fire Resistance Timber has a slow charring rate of between 15 – 25mm per half hour (depending on species) therefore structural integrity remains stable for longer and is more predictable. Masonry or steel conduct heat more readily resulting in cracking/spalling or twisting which can quickly undermine the safety of the entire structure.

Fire Retardant Both external cladding and internal walling can be further protected.

Fire Retardant Both external cladding and internal walling can be further protected from surface spread of flame. External cladding is treated off-site with a pressure impregnation system to achieve ½ hour or 1 hour retardation

Fire Retardant Both external cladding and internal walling can be further protected from surface spread of flame. External cladding is treated off-site with a pressure impregnation system to achieve ½ hour or 1 hour retardation Internal walls can be sprayed during the construction process typically Nullifire and be certified for Class O resistance

Question; Timber has a slow charring rate of 15 – 25mm per half hour (depending on species) therefore on solid timber builds such as MPL structural integrity remains stable for longer and is more predictable in a fire. True or False

False Are You Sure? Timber has a slow charring rate of 15 – 25mm per half hour (depending on species) therefore on solid timber builds such as MPL structural integrity remains stable for longer that steel/masonry and is more predictable in a fire. Try again?

True. Correct - Timber has a slow charring rate of 15 – 25mm per half hour (depending on species) therefore on solid timber builds such as MPL structural integrity remains stable for longer that masonry/steel and is more predictable in a fire.

Air Tightness MPL buildings have been recorded with air tightness as low as 3.24m³/hr at 50Pa and can achieve lower.

Air Tightness MPL buildings have been recorded with air tightness as low as 3.24m³/hr at 50Pa and can achieve lower. This is a substantial improvement on building Regulations requirement of 10m³/hr at 50Pa

Site Waste Industry standard for site waste is tonnes per square meter of build

Site Waste Industry standard for site waste is tonnes per square meter of build Cabinco have brought this down to tonnes of waste to landfill per square meter of build and current projects are anticipating tonnes per square metre of build.

Site Waste Industry standard for site waste is ton per square meter of build Cabinco have brought this down to tonnes of waste to landfill per square meter of build. We are working towards reducing this further as we develop our SWMPs and current projects are anticipating only tonnes to landfill per square metre of build.

Construction Time MPL is a method of off-site construction which is fixed together on-site. This makes building times more rapid.

Construction Time MPL is a method of off-site construction which is fixed together on-site. This makes building times more rapid. Removal of wet trades further reduces weather delays and improves construction times.

Construction Time MPL is a method of off-site construction which is fixed together on-site. This makes building times more rapid. Removal of wet trades further reduces weather delays and improves construction times further. Eg: 120m² building completed in just 23 days (complete structural shell) 734m² building completed (including all foundations) in just 20 weeks.

Construction Process Heavy duty baseframe over pile foundation insulated ready to create working floor

Construction Process MPL structural shell takes shape with all internal and external walls built at the same time

Construction Process MPL is at eaves height, so roof timbers are brought into place. Some buildings require crane assistance, others can be installed manually.

Construction Process Roof Make-up in progress, breather, batten, and now insulation.

Construction Process Roof tiling commences, insulation to the exterior of the walls underway.

Construction Process Factory finished windows & doors positioned. Fire treated larch cladding is cut and fixed to exterior

Construction Process Scaffold down and window trims in place

Construction Process Internal second fix underway, visible structural beams and large roof lights.

Complete Complete.

Sites with Restricted Access
Pre-fabricated panels or logs can be transported to site on a tele-handler or side loader (depending on size)

Sites with Restricted Access
Pre-fabricated panels or logs can be transported to site on a tele-handler or side loader (depending on size) Machine profile logs and smaller panels can even be manually carried where access is particularly difficult

With a little trackway and a sideloader – this narrow access was suitable for an MPL project.

Question; MPL Buildings are ideal for locations with difficult or restricted access True or False

False Are you sure? MPL buildings arrive to site in packs which can be moved by a telehandler or sideloader making them ideal in areas where narrow access exists. In really restricted areas, the packs can be broken down and logs carried manually. Try again?

True. Correct - MPL buildings arrive to site in packs which can be moved by a telehandler or sideloader making them ideal in areas where narrow access exists. In really restricted areas, the packs can be broken down and logs carried manually.

Limitations Shrinkage occurs in all MPL buildings, depending on the wall thickness and building height but it is typically 60mm for a single storey building. Cad Techniques are used to model shrinkage at design stage, and develop compensating features such as:

Limitations Shrinkage occurs in all MPL buildings, depending on the wall thickness and building height but it is typically 60mm for a single storey building. Cad Techniques are used to model shrinkage at design stage, and develop compensating features such as: Use of sliding brackets on all fixings

Limitations Shrinkage occurs in all MPL buildings, depending on the wall thickness and building height but it is typically 60mm for a single storey building. Cad Techniques are used to model shrinkage at design stage, and develop compensating features such as: Use of sliding brackets on all fixings Lamination of wall logs to reduce splitting/shaking

Question; To allow for shrinkage in an MPL building, all fixings are made using sliding brackets to allow the wall to settle without disruption. True or False

False Are you sure? Try again?
These sliding brackets allow for the movement and settlement of the timbers without disrupting the fixings.

True. Correct - These sliding brackets allow for the movement and settlement of the timbers without disrupting the fixings.

Benefits Rapid Construction

Benefits Rapid Construction Long lifespan

Benefits Rapid Construction Long lifespan Sustainable materials

Benefits Rapid Construction Long lifespan Sustainable materials
Embodied Carbon

Embodied Carbon Clean, quiet safe sites

Embodied Carbon Clean, quiet safe sites Suitability for difficult access

Embodied Carbon Clean, quiet safe sites Suitability for difficult access Individual design

Embodied Carbon Clean, quiet safe sites Suitability for difficult access Individual design High levels of carbon sequestration

Clean, quiet safe sites Suitability for difficult access Individual design High levels of carbon sequestration Low waste

Question; The principal construction material in an MPL building is both, natural, renewable and recyclable making it ideal for sustainable construction. True or False

False Are you sure? The principal construction material is timber which is natural and renewable. This can be verified through PEFC/FSC Chain of Custody certification. It is also fully recyclable with most waste timber on an MPL site classified “Grade A – Reuse” Try again?

True. Correct - The principal construction material is timber which is natural and renewable. This can be verified through PEFC/FSC Chain of Custody certification. It is also fully recyclable with most waste timber on an MPL site classified “Grade A – Reuse”

Certificate Thank you for completing this presentation. Your certificate of completion is available by ing with your name and the date of completion.

Further Information Further and supporting information to the MPL Build system as provided by Cabinco can be found on the Cabinco website and the companies Technical Library which is on Additional information including copies of the Weatherworks report, past energy performance certificates and air pressure test results can be obtained direct from Cabinco. Contact: or ring on If you would like to arrange a formal presentation by one of the Directors of Cabinco to develop product knowledge among your team, (also CPD accredited) please contact Cabinco on or Thank you for completing this CPD module.

Sustainable construction
Machine Profile Log Sustainable construction

Sustainable construction

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