Passive House Principles 3 Storey Side Extension with Compact Unit
The client who is also the architect was looking to build a Passive House quality side extension to his home and contacted us directly due to our experience in this field. Due to an unfavourable form factor – the ratio of building volume to surface area – resulting from site constraints, Passive House could not be achieved however we endeavoured to get as close as possible using Passive House design principles.
We achieved this by building a timber frame structure heavily insulated with rigid board and expanding foam with a brick exterior to meet planning requirements. We fitted high performance windows and a Nilan combined MVHR unit and domestic hot water system. We provided full mechanical, electrical and insulation design and installation. Due to very low heating demands and project cost restrictions we used underfloor electric heating mats throughout.
The extension consists of two bedrooms, two bathrooms, a snug and a kitchen diner. The small building width was very restrictive, there was pressure to retain and maximise internal space, storage potential and to utilise every recess. This resulted in curved walls to increase the feeling of space.
A Loxone smart home system controls heating, MVHR system, & light switches. It was designed with a future provision for control of electric blinds.
Hi all, just wanted to say, we are really impressed with your team in Bounds Green, they are doing such a brilliant job, and are a credit to your company. We’re really lucky to have them working on our project. Thanks for all your fantastic work so far too.
— Nick H
"Rafael Delimata project managed an extension and new kitchen to our Victorian house in 2010. (...) We found him polite and enthusiastic, and very quick to grasp what we wanted from the build - he has great communication skills. He was involved from the beginning and contributed useful ideas and suggestions throughout the project. He is particularly knowledgeable about green issues and we now have a kitchen/breakfast room which is easy and cheap to heat in the winter and cool in the summer. Our previous experiences with builders have not been good - we are demanding clients with backgrounds in interior design, so we are probably not the easiest of customers, but we would have no hesitation in working with Rafael Delimata again and would recommend him to others."
— Donald & Tania S
“It quickly became clear that Bow Tie want to do a good job, they want their work to be to a high standard, no problem is too small to discuss and identify solutions, they really want to get it right.”
— Francis M
“Bow Tie Construction were very professional, they did things to a very high standard and paid a lot of attention to detail. When small issues were flagged here or there they were always keen to investigate and fix them.”
— Francis M
“The house definitely meets expectations and exceeds them in some areas, the heat comfort is very big, the noise is much less than it was, overall very happy with it.”
— Francis M