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CHAS AccreditedDBS CheckedUK Wide
Specialist Capabilities

Comprehensive Fenestration Disciplines

An integrated service architecture covering the complete timber window lifecycle — from initial condition survey through to bespoke joinery manufacture, tested draught exclusion, and principal contractor delivery.

CHAS accredited — approved for all public sector and social housing contracts
Enhanced DBS checked operatives — safe for schools and sensitive sites
Repair Care DRY FLEX® certified — permanent elastic timber repair
Draftfix draught exclusion system — independently tested for air & water
RAMS, Method Statements, and CPP prepared for every site
Works to BS 6375 and conservation officer requirements
All Services

What We Deliver

Select any discipline to inspect technical specifications, testing data, and project case studies.

Timber Window Restoration & Repairs
01

Timber Window Restoration & Repairs

Specialist repair and restoration of historic timber sash and casement windows, retaining original fabric wherever possible.

  • Detailed condition assessment of frame, sashes, cills, and surrounding masonry interfaces
  • Surgical excision of localized fungal decay and wet rot
  • Repair Care System / DRY FLEX resin stabilization across small, large, and moulded profiles
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New Timber Windows
02

New Timber Windows

Bespoke manufacture and supply of high-performance timber sash and casement windows combining traditional aesthetics with modern standards.

  • Selected timber options: European softwood, hardwood, and Accoya
  • All sash and casement options tested and compliant with PAS24
  • Architectural profile matching for sightlines, meeting rails, and historic horns
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Draught Proofing
03

Draught Proofing

Concealed peripheral brush pile and carrier draught exclusion systems independently tested for air tightness and water permeability.

  • Concealed integration into staff beads, parting beads, meeting rails, top rails, and bottom rails
  • Central fin design to eliminate perimeter draughts and rattle while maintaining smooth glide
  • Independent testing for air permeability and resistance to water ingress
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Complete Decoration
04

Complete Decoration

Specialist internal and external decoration tailored specifically to historic timber sash and casement windows.

  • Rigorous surface preparation: mechanical and thermal paint removal where layers impede operation
  • Coordination with timber splice repairs and draught-proofing beads prior to final coating
  • High-performance microporous paint systems allowing timber to breathe while repelling moisture
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Condition Surveys & Consultancy
05

Condition Surveys & Consultancy

Independent technical condition surveys, dilapidation schedules, and fabric audits for historic timber windows.

  • Window-by-window schedule of condition logging rot depth, frame distortion, and hardware viability
  • Clear repair-versus-replace feasibility analysis tailored to conservation policies
  • Assessment of acoustic/thermal upgrade potential, including slim-profile and vacuum glazing viability
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Design & Specification Support
06

Design & Specification Support

Technical consultancy for architects, specifiers, and conservation officers to ensure compliant, buildable window schedules.

  • CAD section profiles aligning modern slim/vacuum glazing within traditional sightlines
  • Specification guidance for timber species selection (Softwood, Hardwood, Accoya)
  • Balancing Part L (conservation of fuel and power) with Listed Building and Conservation Area guidelines
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Main Contractor Delivery
07

Main Contractor Delivery

Specialist subcontractor and principal delivery partner for complex, large-scale residential and public window contracts.

  • Proven delivery on multi-million pound municipal and social housing frameworks (e.g. Keepmoat, TRC Contracts Ltd)
  • Strict site safety, comprehensive RAMS documentation, and full supervision on every project
  • Tenant liaison and phased installation coordination in occupied social and private residential estates
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Proven Systems

Industry-Certified Technical Products & Methods

We are certified applicators of the Repair Care DRY FLEX® flexible resin system and authorised installers of the Draftfix draught exclusion system — two of the most rigorously tested products in heritage timber window conservation across the United Kingdom.

DRY FLEX timber repair
Repair Care DRY FLEX®
Draftfix section drawing
Draftfix CAD Section
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Have a Heritage Window Project?

Whether you have a single window or a large programme of works, our team will provide a professional, detailed response to your enquiry.

info@velziynprojects.comLondon & NationwideCHAS Accredited