14/10/2026
π¨ Complete Outdoor Space Transformation: Custom Bathroom Extension Built From Scratch! π‘
I recently completed a highly rewarding structural project, building a bespoke external bathroom extension from the ground up to add valuable extra space and utility to a property. Taking care of every phase myselfβfrom the initial structural modifications to the final crisp external finishesβI turned a simple window opening into a fully insulated, premium modern extension.
Here is a breakdown of how I executed this project:
β’ Structural Entry Opening: I carefully knocked out and modified the existing brick window junction, using heavy-duty acrow props to safely support the masonry load while creating a spacious new structural entryway leading straight from the main house.
β’ Groundwork & Drainage Overhaul: Before building upward, I handled the essential groundwork. I excavated the site and installed a brand-new, dedicated waste drainage connection for the upcoming shower zone, routing it directly into the main drainage manhole for zero hassle.
β’ C24 Timber Framework: I engineered and erected a high-strength, lightweight external timber carcass using premium treated 4x2" and 6x2" C24 structural timber.
β’ Premium Thermal Insulation: To guarantee maximum comfort and warmth, I wrapped and filled the extension walls and floor structure with a minimum of 75mm high-performance Celotex insulation boards, sealing the envelope completely from the elements.
β’ Solid Flooring & Triple Glazing: I laid down a rock-solid subfloor using 22mm moisture-proof chipboard over the floor insulation layer. For maximum efficiency, I also installed a high-quality, openable triple-glazed uPVC obscure window (610x965mm).
β’ High-End Weatherboarding & Render Finishing: Externally, I sheeted the frame with robust 18mm OSB boards and wrapped it in a high-grade roofing membrane. I then finished the exterior walls with premium, highly durable fibre-cement cladding panels and matching corner trims for a sleek, modern, low-maintenance finish.
β’ Professional Slate Roof & Rainwater Kit: I constructed a durable pitched roof using clean roofing membrane, treated timber battens, and premium fibre-cement slates. To secure the boundary junctions permanently against water ingress, I dressed brand-new 240mm Code 3 lead flashing into the brick wall mortar joints, finishing the roofline with a clean black fascia board and a high-flow downpipe and gutter kit.
Every detail of this buildβincluding all skilled labour, premium materials, and thorough waste disposalβwas managed entirely by myself to guarantee a highly stable, watertight, and stunning final addition. The client was absolutely over the moon with the craftsmanship and the complete layout change!
Planning an extension, custom timber framing, or property alteration? Contact me today for a professional, top-tier build:
π Phone: 07780 117 243
π§ Email: [email protected]
π» Structural Carpentry & Roofing β Expert craftsmanship from foundation to roofline.