The STA guide to Timber Frame panels

As an STA Gold Assure member, Merronbrook is making sure our panel offering is an STA pattern book tested panel.


Timber Frames

Timber frame construction, being one of the Modern Methods of Construction (MMC) in today’s buoyant industry, can be manufactured as an off-site product in various panel make-ups. What Merronbrook is absolutely committed to is making sure we conform to a pattern book tested panel by the STA.


Merronbrook’s Timber Frame Panel

We offer an open panel system, using a 140mm CLS stud insulated with a rigid insulation board. This is then clad externally with 9mm OSB ply, finished with a reflective shield breather paper.

STANDARD with a U-value of 0.18 W/m²K

As a compliant panel make-up, the following elements need to be installed:

  • External façade: brick or block
  • Cladded panels will decrease this U-value by 0.01 W/m²K
  • 50mm cavity
  • Reflective shield breather paper
  • 9mm OSB ply
  • Or an A1 non-combustible board for fire mitigation properties
  • 140mm CLS timber stud
  • 120mm PIR rigid insulation board

To take our STANDARD panel to any desired performance level, we can advise on the following additional products to be installed internally:

ENHANCED with a U-value of 0.17 W/m²K

  • Standard VCL (Vapour Control Layer)
  • 25mm x 38mm service void batten

SUPER with a U-value of 0.14 W/m²K

  • Standard VCL (Vapour Control Layer)
  • 25mm PIR rigid insulation overboard.
  • 25mm x 38mm Service void batten.

SUPERIOR with a U-value of 0.12 W/m²K

  • Reflective VCL (Vapour Control Layer)
  • 40mm PIR rigid insulation overboard.
  • 25mm x 38mm Service void batten.

Why Merronbrook?

As always, Merronbrook is striving to achieve the best results for our clients, guiding them through ever-changing legislation within this demanding industry. We are here to help, so please feel free to contact our Business Development Manager, Gavin Alderslade, on 07534 701 747 or at gavin@merronbrook.co.uk with any questions you may have regarding a potential project.