D-Core Knowledge Hub

Clear answers for your next project.

A central library for regulatory advice, official manufacturer guides, energy-saving grants and inspiration. Practical, dated, and structured for homeowners.

Information boundary: The Hub connects general guidance, not site-specific survey or design decisions. Always confirm costs, compliance, and suitability for your exact property before commissioning work.

Browse by topic

Advice

Insulation in loft conversions

How roof build-up, ventilation and available rafter depth influence a loft conversion.

Read MoreRev: 2026
Advice

Warm roof vs cold roof

The practical difference between insulation above and below a roof deck.

Read MoreRev: 2026
Advice

Insulation in extensions

Why walls, floors, roofs, openings and junctions must be considered together.

Read MoreRev: 2026
Advice

Building Control for a loft or extension

What Building Control does and what drawings are normally needed.

Read MoreRev: 2026
Advice

Council vs registered private building control approver

A neutral comparison of the two routes without promising speed or price.

Read MoreRev: 2026
Advice

Party Wall basics for building work

When work near a boundary or shared structure may need formal steps.

Read MoreRev: 2026
Advice

Fire doors and fire safety in loft conversions

Why a loft fire strategy is coordinated rather than reduced to one universal door label.

Read MoreRev: 2026
Advice

GRP roofing: what to ask before specifying it

A practical overview of substrate, falls, detailing and manufacturer systems.

Read MoreRev: 2026
Advice

Resin-bound driveways

How sub-base, drainage, aggregate and installation conditions affect a resin-bound surface.

Read MoreRev: 2026
Advice

Bathroom and wet-room tanking

Why waterproofing sits behind the finish and needs compatible corners, joints and substrates.

Read MoreRev: 2026
Advice

Underfloor heating (UFH)

A planning guide to floor build-up, controls, heat source and finished floor.

Read MoreRev: 2026
Advice

Drainage when extending a house

What to check about drains, manholes, falls, access and build-over requirements.

Read MoreRev: 2026
Advice

Structural steels in alterations

Why beams need calculations, bearings, temporary works and inspection.

Read MoreRev: 2026
Advice

Living in the house during works

Questions to settle about phasing, security, dust, utilities and safe access.

Read MoreRev: 2026
Advice

Scaffolding, access and parking

Why logistics influence price, programme, safety and neighbour communication.

Read MoreRev: 2026
Advice

What drawings are needed before pricing?

How better information turns a broad budget into a clearer scope.

Read MoreRev: 2026
Advice

Silicone and monocouche render

How through-coloured renders differ, and the substrate, weather and detailing checks that protect an external finish.

Read MoreRev: 2026
Advice

External render and EWI maintenance

A homeowner checklist for keeping rendered insulation systems, junctions and drainage details serviceable.

Read MoreRev: 2026
Advice

Pitched roofing: natural and fibre-cement slates

What homeowners should check when selecting, repairing or replacing slate roof coverings.

Read MoreRev: 2026
Advice

Pitched roofing: clay and concrete tiles

A guide to tile selection, fixing, ventilation and the warning signs of a failing covering.

Read MoreRev: 2026
Advice

Roof battens, membranes and ventilation

Why the concealed layers under a pitched roof are as important as the visible tiles or slates.

Read MoreRev: 2026
Advice

Roof ridges, hips, valleys and flashing details

How the most exposed pitched-roof junctions shed water and resist wind.

Read MoreRev: 2026
Advice

Boiler longevity, servicing and system water

Practical maintenance for a heating system, with clear boundaries around Gas Safe work.

Read MoreRev: 2026
Advice

Post-winter boiler and heating checks

Safe homeowner checks after heavy heating use, and the point at which an engineer should take over.

Read MoreRev: 2026
Advice

Basic plumbing and push-fit manufacturer guidance

What homeowners can learn from approved pipe systems, and why preparation and isolation matter.

Read MoreRev: 2026
Advice

Home electrical safety: what a homeowner can and cannot do

A plain-English explanation of inspection, Part P and the limits of DIY electrical work.

Read MoreRev: 2026
Advice

Block paving, patios and surface-water runoff

How sub-bases, falls, joints, thresholds and drainage affect durable paving.

Read MoreRev: 2026
Advice

Maintaining resin-bound and paved surfaces

Seasonal maintenance that protects joints, drainage and finishes without promising a permanent surface.

Read MoreRev: 2026
Advice

Window systems, glazing and performance

Comparing uPVC, timber and aluminium profiles alongside thermal, acoustic, daylight and security considerations.

Read MoreRev: 2026
Manufacturer Guide

External Wall Insulation Solutions

System information for external wall insulation and compatible finishes.

Open Source
Manufacturer Guide

Renders & Decorative Finishes Guide

Manufacturer reference; confirm the current edition before specifying.

Open Source
Manufacturer Guide

MAPEGUM WPS flexible liquid tanking membrane

Product and system reference for wet areas.

Open Source
Manufacturer Guide

MAPEBAND EASY

Reference for wall/floor and corner joint detailing.

Open Source
Manufacturer Guide

Kooltherm insulation range

Product-family reference; build-ups require project-specific design.

Open Source
Technical Reference

Insulating a loft conversion with Kingspan Kooltherm

Official-title reference; verify current channel ownership before publication.

Open Source
Manufacturer Guide

Loft window installation

Manufacturer installation overview.

Open Source
Manufacturer Guide

Roof window installation: all you need to know

Manufacturer technical reference.

Open Source
Manufacturer Guide

White Book – plaster systems

System and board selection reference.

Open Source
Manufacturer Guide

Installation guidance and support

Manufacturer installation reference.

Open Source
Manufacturer Guide

Gyproc FireLine MR 12.5mm

Product data; do not infer a complete fire strategy from one board.

Open Source
Manufacturer Guide

JG Underfloor Heating Manifold Kit Installation Guide

Manufacturer installation reference.

Open Source
Manufacturer Guide

Speedfit product guides and videos

Use alongside a competent design and installation process.

Open Source
Manufacturer Guide

Polypipe UFH and ARDEX technical installation guide

Official product and compatible-flooring reference.

Open Source
Manufacturer Guide

How to install Polypipe Overlay underfloor heating system and LVT

Official manufacturer video reference; project heat-loss, controls and floor build-up still require competent design.

Open Source
Manufacturer Guide

Product & Installation Manual – Soil and Waste

Drainage product and installation reference.

Open Source
Manufacturer Guide

Rainwater guttering – selection and installation

Manufacturer rainwater reference.

Open Source
Manufacturer Guide

Waterproof or tank bathrooms before tiling

Technical wet-area reference; not a substitute for project design.

Open Source
Manufacturer Guide

Technical support – tiling courses and solutions

Manufacturer technical support.

Open Source
Manufacturer Guide

Cure It GRP roofing system – installation guides

Existing D-Core technical reference, retained and clearly attributed.

Open Source
Manufacturer Guide

Cure It GRP waterproofing system – full version

Manufacturer video; not authored by D-Core.

Open Source
Manufacturer Guide

Vuba Surfaces technical documents

Existing D-Core technical reference, retained and clearly attributed.

Open Source
Technical Reference

Part P of the Building Regulations explained

Process and certification education only; no DIY electrical instructions.

Open Source
Technical Reference

Building regulations for electrical installations

Safe process reference; use a competent registered professional.

Open Source
Technical Reference

Registered electrical contractors and standards

Professional registration and certification context only.

Open Source
Manufacturer Guide

Silicone renders and decorative finishes

System and finish reference; substrate, weather and compatibility must be checked.

Open Source
Manufacturer Guide

Pitched roofing systems and accessories

Manufacturer reference for tiles, slates, battens, ventilation and accessories.

Open Source
Manufacturer Guide

Roof tiles technical information

Product and fixing reference; select by roof design and exposure.

Open Source
Manufacturer Guide

Roofing accessories and dry-fix systems

Reference for ridge, hip, verge and junction accessories.

Open Source
Technical Reference

Gas safety at home

Homeowner safety information; gas work must be done by a Gas Safe registered engineer.

Open Source
Manufacturer Guide

Boiler care and homeowner advice

Manufacturer homeowner reference for servicing and heating operation.

Open Source
Manufacturer Guide

Boiler support and servicing information

Manufacturer support reference; repairs and servicing require appropriate competence.

Open Source
Manufacturer Guide

Paving and driveway installation guides

Installation and care reference for paving and driveway products.

Open Source
Technical Reference

How to lay block paving

Official Marshalls external video guide; opens as a normal YouTube link and is not auto-embedded.

Open Source
Manufacturer Guide

Garden drainage and paving guidance

Use with project-specific falls, outfalls and surface-water assessment.

Open Source
Manufacturer Guide

Speedfit plumbing system product guides

Manufacturer installation and compatibility reference.

Open Source
Manufacturer Guide

EPDM flat-roof installation guides

Supplier installation library; confirm the selected membrane system and current details before work.

Open Source
Manufacturer Guide

Residential ventilation installation manuals

Manufacturer manuals for ventilation systems; selection, airflow design and commissioning remain project-specific.

Open Source
Manufacturer Guide

Window installation guidance

Manufacturer fitting reference for its own window systems; opening, structure, weathering and compliance must be checked.

Open Source
Manufacturer Guide

Bi-fold door installation guidance

Manufacturer fitting reference for its own door system; not a generic detail for other products.

Open Source
Technical Reference

Domestic heat pumps – best-practice guide

Independent technical reference for competent system design and installation.

Open Source
Technical Reference

Consumer guidance for certified renewable systems

Certification and consumer-protection reference covering solar, storage and heat-pump technologies.

Open Source
Manufacturer Guide

Wiser smart-heating documentation

Manufacturer user and installation documentation; electrical and heating-system compatibility must be checked.

Open Source
Manufacturer Guide

zappi EV charger product and support information

Manufacturer reference; charger selection, supply capacity, notification and installation require a competent electrical process.

Open Source
Technical Reference

Electrical safety Approved Document P

Regulatory reference; not DIY electrical instruction.

Open Source
Editorial
check before applying

Home energy grants: eligibility, routes and what to check

A route map for checking current UK and local energy support without promising funding or approval.

Read MoreRev: 2026
Editorial
current

Grant status checklist: open, seasonal or closed

How to record a grant's status and avoid treating an old announcement as live funding.

Read MoreRev: 2026
Advice

U-values: what they mean and why they matter

A plain-English guide to heat flow through building elements and the Approved Document L 2026 transition.

Read MoreRev: 2026
Editorial
guidance

Heat pumps: what to plan before choosing a system

A practical starting point for heat-loss, emitters, hot water, controls, space and installer checks.

Read MoreRev: 2026
Editorial
guidance

Solar PV, batteries and smart controls

Questions to ask about generation, storage, export, controls, roof condition and electrical certification.

Read MoreRev: 2026
Editorial
guidance

EWI and retrofit sequencing

Why moisture, ventilation, junctions and services should be assessed before external insulation.

Read MoreRev: 2026
Editorial
guidance

Low-carbon systems and new technology: compare the whole home

A non-promotional framework for comparing fabric, heating, generation, storage, ventilation and controls.

Read MoreRev: 2026
Advice

External wall insulation (EWI) and render

What EWI changes, what render protects, and why existing-wall assessment matters.

Read MoreRev: 2026
Advice

Underfloor heating (UFH)

A planning guide to floor build-up, controls, heat source and finished floor.

Read MoreRev: 2026
Inspiration

Extensions

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Loft Conversions

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Kitchens

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Bathrooms

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Interiors

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Exterior Finishes & Render

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Roofing

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Resin-bound Driveways

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Doors, Windows & Glazing

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Stairs

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Inspiration

Lighting & Finishes

Design possibilities and conceptual reference imagery. These are examples for inspiration, not completed D-Core projects.

Read More
Editorial
guidance

A homeowner maintenance plan

A proportionate way to schedule checks, keep records and commission specialist work before small defects grow.

Read MoreRev: 2026
Advice

External render and EWI maintenance

A homeowner checklist for keeping rendered insulation systems, junctions and drainage details serviceable.

Read MoreRev: 2026
Advice

Boiler longevity, servicing and system water

Practical maintenance for a heating system, with clear boundaries around Gas Safe work.

Read MoreRev: 2026
Advice

Post-winter boiler and heating checks

Safe homeowner checks after heavy heating use, and the point at which an engineer should take over.

Read MoreRev: 2026
Advice

Basic plumbing and push-fit manufacturer guidance

What homeowners can learn from approved pipe systems, and why preparation and isolation matter.

Read MoreRev: 2026
Advice

Home electrical safety: what a homeowner can and cannot do

A plain-English explanation of inspection, Part P and the limits of DIY electrical work.

Read MoreRev: 2026
Advice

Maintaining resin-bound and paved surfaces

Seasonal maintenance that protects joints, drainage and finishes without promising a permanent surface.

Read MoreRev: 2026

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