The timbers, glazing and framework dimensions behind every piece of T&F Joinery — specified for Norfolk weather and built to British Standards.
Timber & structure
Selected for strength, durability and finish
Selected timber sections are used for a combination of strength, durability, machining flexibility and an ability to accept a wide range of finishes.
The hardwood timber is naturally resistant to wood rot and fungal attack, and the natural oils present in the timber make it resistant to moisture penetration.
Key specifications
Documented, tested and to standard
Moisture content
Kiln dried to 12–14%
Controlled moisture content keeps frames stable after installation, minimising movement, shrinkage and subsequent draughts.
Strength
9300 Young’s Modulus
A measure of elasticity — the higher the value the greater the strength. For comparison, Brazilian Mahogany is 8600 and softwood 7300.
Specification conformance
Hardwood to BS1186
Hardwood sections are specified and supplied in conformance with British Standard BS1186 for joinery timber.
Glazing units
12mm, 20mm, & 24mm
Double-glazed units with Planitherm glass and Argon gas achieve the right energy ratings; leaded or coloured available. Heritage 12mm slim units suit listed building upgrades where a standard unit won't fit — modern U-value, original sightlines.
“Natural oils make our hardwood resistant to moisture penetration — and the finish range is wide enough for any interior.”
Yes. Our windows can be fitted with 24mm double-glazed units with Planitherm glass, or traditional single glazing if required. We can also supply leaded and coloured units to suit your taste.
Joinery-quality Scandinavian softwood and hardwood including mahogany, oak and Idigbo, plus oak, maple, beech and walnut for staircases. We can use any hardwood or softwood to suit the project.
All softwood products receive preservative treatment in our Ludham workshop, and our joinery is fully weather-sealed using quality ironmongery throughout.
Yes — we regularly manufacture from architect drawings and reproduction details for listed buildings and conservation areas, including shot-in casements for flush walling.
