Small section engineered timber I-joist frame cut off-site. Exceptional ratios of 85:15% insulation:structure can be acheived.
” hotspot_horizontal=”45%” hotspot_vertical=”45%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||3px|false|false” tooltip_padding=”||||false|false” tooltip_text_margin=”||||false|false” tooltip_text_padding=”||||false|false” tooltip_desc_padding=”|5px||5px|false|false” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” tooltip_text_font_size=”12px” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”2″ tooltip_use_hotspot_icon=”off” tooltip_content=”Open web eco-joists (with 22mm deck) for easier installation of services
” hotspot_horizontal=”23%” hotspot_vertical=”53%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” tooltip_desc_margin=”||||false|false” tooltip_desc_padding=”|5px||5px|false|false” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”3″ tooltip_use_hotspot_icon=”off” tooltip_content=”Robust and simple combined air-tightness and racking layer.
” hotspot_horizontal=”31%” hotspot_vertical=”44%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||3px|false|false” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”4″ tooltip_use_hotspot_icon=”off” tooltip_content=”Raft slab supported on recycled glass insulating blocks. Can be ground bearing or suspended.
” hotspot_horizontal=”30%” hotspot_vertical=”77%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||2px|false|false” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”5″ tooltip_use_hotspot_icon=”off” tooltip_content=”Thermal bridge free junctions to ensure maximum performance and durability.
” hotspot_horizontal=”34%” hotspot_vertical=”80%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||5px|false|false” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”6″ tooltip_use_hotspot_icon=”off” tooltip_content=”Low carbon, vapour open, natural insulations. Blown insulation supplied and installed.
” hotspot_horizontal=”52.5%” hotspot_vertical=”45%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||3px|false|false” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}” tooltip_image_margin__hover_enabled=”on|desktop”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”7″ tooltip_use_hotspot_icon=”off” tooltip_position=”right” tooltip_content=”Zehnder Comfoair MVHR designed, supplied and commissioned. Installation training also supplied.
” hotspot_horizontal=”55%” hotspot_vertical=”22%” hotspot_sizing=”28″ hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” hotspot_padding=”|||4px|false|false” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” hotspot_text_letter_spacing=”4px” hotspot_text_line_height=”1em” background_color=”RGBA(255,255,255,0)” background_enable_color=”on” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”8″ tooltip_use_hotspot_icon=”off” tooltip_content=”Triple glazed windows
” hotspot_horizontal=”67%” hotspot_vertical=”55%” hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” box_shadow_style_hotspot=”preset1″ box_shadow_horizontal_hotspot=”-11px” global_colors_info=”{}”][/dnxte_tooltip_child][dnxte_tooltip_child tooltip_hotspot_text=”9″ tooltip_use_hotspot_icon=”off” tooltip_position=”right” tooltip_content=”A wide choice of external finishes can be used on the finished shell so long as they are vapour open/vented.
” hotspot_horizontal=”63%” hotspot_vertical=”47%” hotspot_bg=”#C55F0D” hotspot_wave_color=”#C55F0D” tooltip_desc_padding=”|5px||5px|false|true” _builder_version=”4.16″ _module_preset=”default” hotspot_text_font_size=”14px” box_shadow_style_hotspot=”preset1″ box_shadow_horizontal_hotspot=”-11px” global_colors_info=”{}”][/dnxte_tooltip_child][/dnxte_tooltip]Main components of the PH15 System are:
A. THE WEATHER-TIGHT SHELL: The timber frame is designed in 3-D, which includes structural engineering. The shell includes the intermediate ‘open webbed’ floor joists and the floor boards, as well as the stud work for the internal walls (no stairs). The engineered I-joist frame and LVL beams and lintels, are all pre-cut off-site and arrive flat packed ready for erection, with easy to read frame erection drawings. Other elements included are the high quality air-tightness tapes, membranes and grommets, the guaranteed air-tightness/racking boards, all the natural insulation’s including external wood fibre boards and the blown-in insulation (also installed on site). The PH15 wall/roof construction comprises over 85% insulation, giving PH15 a very low timber fraction. PH15 also covers two air-tightness tests, carried out by the most experienced tester in the UK.
B. THE WINDOWS & DOORS: Supply of high performance, triple-glazed timber windows and energy-efficient doors, typically clad externally in aluminium for low maintenance. Further options are a folding/sliding door set, sliding doors, patio doors, triple glazed roof lights and triple-glazed sun tubes. The windows and doors can be selected from a range of design options, including colours and finishes.
C. THE VENTILATION SYSTEM: Design, supply and commission of the ventilation system (MVHR) which is always a Passivhaus Certified unit, and typically 85-90% efficient. The ventilation system continuously delivers fresh air to every habitable space in your home and extracts continuously from bathrooms and kitchens.
COMPONENTS FURTHER OUTLINED IN THE DROP DOWN MENU BELOW
Foundation
Precision cut timber frame
Intermediate floors
External wood fibre cladding
Airtightness tapes and membranes
Blown in Insulation
High levels of insulation, installed without gaps is an essential part of a Passivhaus. We use either cellulose or wood fibres blown into the frame void fully filling the walls and roof, which for most situations in the UK is 360mm deep. Some inaccessible spaces are hand filled with Steicoflex as the build progresses.
Passivhaus suitable windows and doors
The PH15 system is supplied with either Katzbeck or Green Building Store ULTRA windows and doors. This ensures a good range of wood and wood/alu-clad options. The exact specification will depend on the overall performance requirements of each project and, of course, personal design preferences. In addition to lift and slide doors which allow large, unrestricted openings, there is an option to have Lacuna folding sliding doors (all wood only). We prepare a window/door schedule as part of our PH15 supply. Each PH15 project also has a PHPP energy assessment completed assess summer overheating risk and to agree the strategy to mitigate where needed. We can supply low ‘g’ glass, external blinds and integrated fly screens, as well as look at other passive shading approaches e.g. through planting. We also supply a sash look-alike from BEWISO, if a more traditional aesthetic is required.
Heat Recovery Ventilation System
Training Modules and Support
PROJECT PLAN: Each project has a bespoke PH15 Plan and the different PH15 elements are delivered to site to fit in with your build programme. Each new project is supported with an initial training session and technical telephone support throughout. On completion of the shell, an air-tightness test is carried out, we typically achieve results of 0.3-0.4 ach@50Pa, which meets full Passivhaus criteria.
FINISHING: Generally, the final wall & roofing finishes are up to you to supply & install, most finishes are compatible. The external wall finish is always supplied if it is a lime or silicate render and comes with a guarantee If you are wanting a timber rain screen we can also supply. The internal fit-out can also follow to your own specification and there is an internal services void for easy install of electrics and plumbing.
Our services range from the supply only of the PH15 System, through to full house design. For architects and designers there is a PH15 System Design Guide and we also supply a set of PH15 System Construction Details (scale 1:10) to suit your project. Using PH15, avoids the risks associated with reinventing the wheel – PH15 is a tried and tested construction solution that delivers quality at a fair price. You can have cost certainty on your Passivhaus components within a 5% range at planning stage, and confidence that exceptional air tightness can be achieved that relies only on standard UK carpentry skill.
