Juraj Mikurcik
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jurajmikurcik.bsky.social
Juraj Mikurcik
@jurajmikurcik.bsky.social
4.1K followers 860 following 2.2K posts
Passivhaus architect. Bio-based materials. UK support for ecococon.eu straw panels. Often taking close-up photos of sheds on bike rides

Living in a 100% electric passivhaus with zero energy bills, see the blog: oldholloway.wordpress.com
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jurajmikurcik.bsky.social
That's why a continuous ventilation is so useful to have in winter. Our indoor RH vs outdoor RH readings for this month for info, running a continuous MVHR system
graph showing indoor and outdoor relative humidity levels in a home ventilated with MVHR system
November 25, 2025 at 10:21 AM
jurajmikurcik.bsky.social
80 or 90% Relative Humidity outside in winter is still lower in absolute terms when compared with 60-70% RH indoors, it's linked to temperature
chart explaining relationship between relative and absolute humidity at different temperatures
November 25, 2025 at 9:29 AM
jurajmikurcik.bsky.social
A bit like this recent example from France
Suspended timber floor made from engineered I-beams Suspended timber floor made with engineered I-beams, OSB sheating board resting on bottom chords of I-beams, flexible woodfibre insulation filling the voids between beams
November 22, 2025 at 7:51 PM
jurajmikurcik.bsky.social
You mean in walls? Those are prefab straw timber panels with integrated diagonal members for racking, no need for extra racking boards. Like the panels on the left & right here
Assembly of EcoCocon straw timber panels
November 22, 2025 at 6:18 PM
jurajmikurcik.bsky.social
What do you do on a dreich Saturday? Draw some suspended timber floor details of course!
Drawing of a suspended timber floor supporting a straw timber panel wall. Mainly natural or biobased materials are used
November 22, 2025 at 5:04 PM
jurajmikurcik.bsky.social
Got to love the warm rays of sunshine first thing in the morning
Home interior flooded with warm morning light. Wooden door, clay plastered wall, clay fired plates on a wooden shelf Home interior flooded with warm morning light. Detail of a window with curved clay plastered reveals Home interior flooded with warm morning light. Clay plastered walk, framed graphic illustrations and shadows of house plants Home interior flooded with warm morning light. A flowering house plant on a window cill
November 21, 2025 at 8:53 AM
jurajmikurcik.bsky.social
Dawn ☀️
Sky at dawn, a full color gradient from reddish orange to blue
November 21, 2025 at 8:21 AM
jurajmikurcik.bsky.social
First snow of the season ❄️
Snowy landscape
November 19, 2025 at 10:17 AM
jurajmikurcik.bsky.social
We need more ‘experiments in neglect’ especially when it comes to nature. Is that right @irishrainforest.bsky.social ?
An experiment in neglect! A unique experiment is taking place here. The woodland on this hillside has been completely neglected, on purpose, since 1945. Lady Park Wood is a long-term study area to see how woodland develops naturally, when there is no human interference. Species that depend on light, open conditions provided through coppicing and thinning are not faring so well here, whilst fungi, insects and mosses are thriving.
November 18, 2025 at 9:35 AM
jurajmikurcik.bsky.social
Enjoyed a stroll around sunny Bristol yesterday. Brunel riding a Brompton was probably my favourite
Sunny Bristol harbour with old cranes Sunny Bristol harbour with colourful boats and Mud Dock cafe in the background Illustration of Isambard Kingdom Brunel riding a Brompton bike A large artwork on a concrete residential tower block, strong shadows on the sculptural external staircase.
November 18, 2025 at 8:31 AM
jurajmikurcik.bsky.social
We’ve used the leaves as a cosy blanket for our recently sowed wildflower meadow. Fat balls next…
Freshly sprouting wildflower meadow with a blanket of leaves
November 17, 2025 at 8:34 AM
jurajmikurcik.bsky.social
Humans are migrants. By nature.
the immigrants void sculpture by bruno catalano
November 17, 2025 at 8:17 AM
jurajmikurcik.bsky.social
Why is it that drivers of 4x4 SUVs feel invincible to drive through floods?
Abandoned and flooded SUV blocking a local road Interior of abandoned and flooded SUV, muddy interior Roadside hedges ripped out by recent floods on river Monnow Bridge in Skenfrith over river Monnow
November 16, 2025 at 4:13 PM
jurajmikurcik.bsky.social
You'd love Bez ladu a skladu (SK) - wearing suits since 1985
November 13, 2025 at 11:16 AM
jurajmikurcik.bsky.social
Rustenburgstraat is a development of 89 homes for a social housing provider 'Trudo' in Eindhoven/ The Netherlands 🇳🇱

Built with pre-assembled EcoCocon straw wall system 🌾

This is how to normalise construction with biobased materials
Straw panels being pre-assembled in a workshop Pre-assembled straw timber walls being erected on site One and half storey houses made from straw timber panels Interior photo of a house under construction, showing walls lined with OSB and sloping ceiling with rooflights
November 13, 2025 at 9:11 AM
jurajmikurcik.bsky.social
Made the most of Passivhaus Open Days and visited Malvern Passivhaus today. High performance timber frame prefab and 0.13ACH blower door test result - impressive work by Forest of Dean based Passiframe.

#PHopendays #PHopendays2025
Photo of construction site, timber clad passivhaus in Malvern Visitors to Malvern passivhaus during open day, discussing high performance wall assembly Model of a high performance wall assembly using timber I-beams, woodfibre board, air tightness board and blown in cellulose insulation Detail of a window installation in a passivhaus, triple glazed window with a blind recess at the head
November 9, 2025 at 4:43 PM
jurajmikurcik.bsky.social
This is my jam
A Mamdami style slogan saying Healthy Biobased Passivhaus for All
November 9, 2025 at 9:18 AM
jurajmikurcik.bsky.social
Good morning blue sky
Photo of sunrise with orange an blue sky
November 9, 2025 at 7:30 AM
jurajmikurcik.bsky.social
It was a full house! Thank you everyone who visited us today. Great to see so many people interested in healthy, comfortable, high performance buildings built with natural materials.

#passivhaus #phopendays #phopendays2025
November 8, 2025 at 6:49 PM
jurajmikurcik.bsky.social
Beautiful sunny day for a passivhaus open day at Old Holloway ☀️
November 8, 2025 at 9:31 AM
jurajmikurcik.bsky.social
Sweet little sketch of a book. Thanks @ecominimalnick.bsky.social 😉
Me holding a book The Specialist by Charles Sale I sez; dig her deep and dig her wide. It's a mighty sight better to have a little privy over a big hole than a big privy over a little hole. Another thing; when you dig her deep you've got her dug; and you ain't got that disconcertin' thought stealin' over you that sooner or later you'll have to dig again.' 'And when it comes to construc-tion, I sez, I can give you joists or beams. Joists make a good Job. Beams cost a bit more, but they re worth it Beams, you might say, will last for-ever. 'Course, I could give you joists, but take your Aunt Emmy, she ain't gettin' a mite lighter. Some day she might be out there when them joists give way and there she'd be-catched. Another thing you've got to figger on, Elmer, I sez, 'is that Odd Fellows pıcnic in the tall. Them boys is goin o get in there in tours and sixes singin' and drinkin', and the like, and I want to tell you there's nothin' breaks up an Odd Fellows picnic quicker than a diggin' party. Beams, every time, and rest secure. 'And about her roof,' I sez. 'I can give you a lean-to type or a pitch roof. Pitch roofs cost a little more, but some of our best people has lean-tos. If it was fer myself, I'd have a lean-to, and I'll tell you why. 'A lean-to has two less corners fer the wasps to build their nests in; and on a hot August afternoon there ain't nothin so disconcertin' as a lot of wasps buzzin' round while you're settin' there doin' a little readin' figgerin' , or thinkin' . Another thing, I sez, 'a lean-to gives you a high door. Take that son of yours, shootin' up like a weed; don't any of him seem to be turnin' under. If he was tryin' to get under a pitch roof door he'd crack his head everytime. Take a lean-to, Elmer; they ain't stylish, but they're practical. 'Now, about her furnishin's. I can give you a nail or hook for the cata-logue, and besides, a box tor cobs.
November 1, 2025 at 12:20 PM
jurajmikurcik.bsky.social
Site visit for another @ecococon.bsky.social straw panel project in the local area. Nice to be able to cycle there.
Herefordshire landscape with rolling hills in the background, productive garden in the foreground and an ebike parked alongside.
October 27, 2025 at 1:31 PM
jurajmikurcik.bsky.social
Good morning blue sky ☀️
Sunrise with a blue orange sky and a silhouette of an oak tree to the right
October 26, 2025 at 7:17 AM
jurajmikurcik.bsky.social
Staying in a holiday cottage in Wales. I’ve almost forgotten what condensation looks like 💦

This just never happens in a passivhaus
Condensation on the inside of a window, with water pooling along the bottom edge
October 23, 2025 at 4:54 PM
jurajmikurcik.bsky.social
Some places still available for passivhaus open day at Old Holloway on 8th November

Book 👇

www.eventbrite.co.uk/e/old-hollow...
Old Holloway passivhaus open days
October 22, 2025 at 4:33 PM