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Finding the right build method
The document outlines various building methods for constructing homes, including traditional, timber frame, structurally insulated panels (SIPs), and insulated concrete formwork (ICF), each with distinct pros and cons regarding efficiency, cost, and craftsmanship. Key factors to consider when choosing a building method include hands-on involvement, experience, energy efficiency, aesthetics, budget, and site constraints. Each method presents unique advantages such as speed of construction or reduced labor costs, but also notable disadvantages such as susceptibility to weather, design limitations, or issues with onsite assembly.
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Finding the right build method
- 1. Finding the rightbuild method Finding the right build method
- 2. The four mainbuilding routes Traditional Timber SIPS Frame ICF
- 3. First priorities Building yourown home means different things to each and every one of us. Identifying a few key factors is a good place to start when considering a building system choice. • How much ‘hands on action’ are you looking for? • What level of experience do you have? • Where are you on Energy Efficiency and MMC • How do you want it to look? • Where are you building and is space a constraint? • What’s the budget?
- 4. Route 1: Traditional Perhaps most commonly referred to as brick and block construction - it’s safe to say its still recognised as the most ‘traditional’ of build routes in the UK. • Inner leaf of wall carries the load of the structure • Insulated Cavity • Outer Wall in Brick, Stone or weatherproofed block work • Cavity ties and damp proof measures
- 5. Route 1: Traditional Walling Cost Pros and Cons Say £70 -£75m2 Advantages... Disadvantages... • Universally established & accepted system. • Speed of construction. • Skilled labour easily available. • Inner leaf block work prone to • Materials available locally with settlement/shrinkage cracking. zero notice. • Good load bearing strength. • Workmanship issues in respect • Acceptable energy performance of cavities • Versatile. • Weather dependant
- 6. Route 1: Traditional Variations on a theme Thin Joint Systems Single Skin Masonry • Faster, Easier laying of blocks could suit DIY. • Can be constructed utilising • Easy to trim on site for openings and thin joint or traditional lintels mortar. • No cement mixers • Less waste • Fast (only one wall to build) • Enhanced Insulation possibilities • Insulated on the external face through greater area of block. • Increased air tightness & acoustic properties.
- 7. Route 1: Traditional Eco & Energy Efficiency •energy/CO2 Eco – Credentials: •water (Realistically) Poor •materials •surface water runoff (flooding and flood prevention) Energy Efficiency •waste Variable •pollution •health and well-being •management •ecology
- 8. Route 2: TimberFrame Timber frame is steadily increasing in popularity and it is estimated that the majority of dwellings in Scotland are built using timber frame systems.
- 9. Route 2: TimberFrame Closed Panel System A closed panel refers to the process of building sections of structure off site in a factory and then craning the sections in to position. A weather tight structure with factory installed windows and doors can be erected in a few hours.
- 10. Route 2: TimberFrame Open Panel System An open panel system is more commonly seen in the UK. The external boarding is fixed to the panel in the factory and delivered to site for erection with the insulation and inner face being completed on site.
- 11. Route 2: TimberFrame Pros & Cons Advantages... Disadvantages... • Reduced Site skilled labour costs. • Long procurement process • Reduced wastage • Quality Control factory • Deficiency in on site fixing quality manufactured • Probably not for effective DIY • Faster build to weather tight stage installation • Good energy performance . • Transportation and access • One supplier for design , • Weathering exposure prior to closure manufacture and erection. • Sustainable • Combustibility of part built structure • Critical setting out of ground works • Storage of panels on site
- 12. Route 2: TimberFrame Eco-Credentials & Energy Efficiency Eco – Credentials: (Realistically) Mixed – It can be good but use of FSC Timber offset by insulation which isn’t usually green Energy Efficiency Good if workmanship is of high quality.
- 13. Route 3: StructurallyInsulated Panel (SIPS) SIP Panels are typically made by sandwiching a polystyrene foam core between two OSB boards to create a structural panel. • Created Offsite • Very strong & lightweight panel. • Standard and whole wall solutions • Can be used in Walls, Floor & Roof applications • Can be ‘clad’ in any desired finish.
- 14. Route 3: StructurallyInsulated Panel (SIPS) Walling Cost Say £75 /m2 Roof Cost say £85 /m2 Advantages... Disadvantages... • Ease & speed of assembly. • Careful planning and design required. • Avoids additional framing • Not easy to change adapt or renovate • Airtight down the line • Good thermal and structural • Airtight so need good ventilation properties systems • U Values 0.14 w/m2k • Unforgiving to leaks & water problems • Flat surfaces with good fixing • Home Insurance providers still properties nervous • Less waste on site • Not easily considered for DIY • Uses less raw timber
- 15. Route 3: SIPS Eco-Credentials& Energy Efficiency Eco – Credentials: (Realistically) Mixed – It can be good but use of FSC Timber is offset by insulation which isn’t usually green. Energy Efficiency Very Good.
- 16. Route 4: InsulatedConcrete form work (ICF) Insulated concrete form work consists of prefabricated insulated shuttering created using individual ‘Lego’ blocks which are reinforced and filled with concrete. • Blocks can be of polystyrene or recycled wood product created offsite for on site installation. • Insulation is permanent and is filled with concrete using a pump • Systems can be rendered or completed with brick slips externally and receive direct finishing's internally. • Flexible design solutions, including basements. • Suitable for DIY
- 17. Route 4: InsulatedConcrete Formwork(ICF) DIY Cost Say £85 /m2 Advantages... Disadvantages... • Specialised Design • Ease & speed of assembly. • Unforgiving in terms of set out • Strength mistakes • Energy Efficiency • Airtight so need good ventilation • Noise Suppression systems and dehumidification • Renovation or alteration not • Basement Construction simple • Less Waste • Pouring process requires good • DIY installation feasible. bracing support and adequate vibration.
- 18. Route 4: ICF Eco-Credentials& Energy Efficiency Eco – Credentials: (Realistically) Poor – It’s all concrete and usually petrochem based insulation Energy Efficiency Good if workmanship is of high quality.
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