
Planning & regulations
Building Regulations and SIP Panels
Explore building regulations and SIP panels, including insulation, energy performance and design considerations. Read construction guidance from TRJ.
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THE TRJ JOURNAL · IDEAS & PRACTICAL INSIGHTS
Explore garden rooms, granny annexes, planning and the construction details behind a well-designed building.
39 articles · Page 3 of 5

Planning & regulations
Explore building regulations and SIP panels, including insulation, energy performance and design considerations. Read construction guidance from TRJ.
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SIP construction
Explore sedum roofs for SIP garden rooms and annexes, including drainage, biodiversity and design considerations. Plan a roof around your building.
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SIP construction
Explore SIP panel construction for garden rooms, granny annexes and extensions. Learn about insulated building systems, installation and year-round use.
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SIP construction
Understand SIP panel U-values and British Standards, with factors to discuss for insulation, construction details and a coordinated building specification.
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SIP construction
Compare SIP panels vs timber frame construction for insulation, structure and installation. Explore factors to discuss when choosing a building system.
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Foundations
Explore garden room foundations, including screw piles, concrete pads and rafts. Compare options based on your site, building and ground conditions.
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Garden rooms & design
Compare garden building cladding options, including cedar, Thermowood and silicone K-render. Explore appearance, maintenance and finish considerations.
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Garden rooms & design
Explore air conditioning for garden rooms and granny annexes, including heating, cooling, insulation and choosing a system for year-round use.
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Garden rooms & design
Learn how to choose a garden room builder in the UK by comparing materials, past projects, experience, insurance and reputation.
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