Marcin Piotrowicz - Marcin Piotrowicz Architect

About Marcin Piotrowicz

I'm Marcin Piotrowicz, an architect and certified Passive House designer helping NI homeowners transform cold, leaky houses into warm, efficient homes. I write to share what I’ve learned (and still unlearn) about retrofit, home design, and the awkward beauty of old buildings. Off the clock, I cycle—sometimes upright, sometimes recumbent.

Loft Conversion in Northern Ireland

This page will become the main hub for exploring the [...]

By Marcin Piotrowicz|2025-12-10T11:25:38+00:002025-10-29|Retrofit and Energy|0 Comments

Loft conversion (NI): where to start — a 10-step first check

Thinking about a loft conversion in Northern Ireland? Start with [...]

By Marcin Piotrowicz|2025-10-30T13:02:41+00:002025-10-28|Design & Details|0 Comments

Trussed vs. cut roofs in NI: what it means for your loft

Your roof structure sets the rules of the game. Cut [...]

By Marcin Piotrowicz|2025-10-30T13:02:53+00:002025-10-27|Design & Details|0 Comments

Stairs into the loft (NI terraces): three layouts that work

In compact Northern Ireland terraces, the stair is the make-or-break [...]

By Marcin Piotrowicz|2025-10-30T13:03:06+00:002025-10-26|Design & Details|0 Comments

Ventilation & airtightness in loft conversions (NI climate)

Warm air rises. In a newly formed loft room, that [...]

By Marcin Piotrowicz|2025-10-30T13:14:09+00:002025-10-25|Retrofit and Energy|0 Comments

Don’t Wait Until Your Heating Fails

Picture this: It's a freezing January morning in Belfast. Your [...]

By Marcin Piotrowicz|2025-12-10T11:16:45+00:002025-09-07|Retrofit and Energy|0 Comments

Hello Northern Ireland!

After years of editing this website in both English and [...]

By Marcin Piotrowicz|2025-10-30T14:02:54+00:002024-09-23|Design & Details|0 Comments