Timber Frame Specification

Advanced Housing Systems has developed a closed panel method of construction. This means that the external wall panels are fully fabricated in our factory, the insulation quilt and vapour barrier are fitted in an ideal dry environment and the panel is then clad on both faces, with electrical conduits fitted if appropriate. This reduces the amount of work that needs to be done on site and allows the frame to be quickly and accurately assembled.

We offer a range of different panel thcikness to suit your aestehic and percromance needs.

This diagram has been superceded by our improvements, but we've left it in as it shows the SIPS relation to the cladding, in this case brick.

1. Panel Vent Sheathing

2. 184mm Structural timber frame

3. Factory fitted insulation batts

4. Factory fitted vapour barrier

5. Factory fitted Fermacell wall board

6. Factory fitted electrical boxes and conduit

7. External cladding eg. brick, block, stone etc.



Because there are as many timber frame specifications as there are timber frame companies, it is often difficult for clients to be able to make meaningful comparisons between different quotes. Often the variations in price are considerable, so the prospective builder needs to know exactly what is included and what is omitted from the quote, as well as the relative quality of the specific components. To help in the evaluation of different quotes we have produced the following table: see what we provide as standard and then compare this with other companies.










Choice of wall thickness for external panels
Fully pre-fabricated closed panel wall construction comprising:

Fully pre-fabricated internal wall panels comprising:

Factory fitted high quality insulation

Factory fitted Fermacell gypsum wall lining board to one face

Factory fitted 1200 gauge vapour barrier

Fermacell to other face


Factory installed and sealed electrical conduits and back boxes

High quality insulation


9.2mm Panelvent sheathing board to outer face

Internal joinery to comprise:  

12.5mm Fermacell gypsum wall lining board to inner face

Scandinavian pre-hung internal door sets


All wall panels are manufactured to their largest possible size


Door thresholds, architraves, skirtings and window cill boards


All structural timbers vacuum treated


Whole house heat recovery and mechanical ventilation system


External joinery to comprise:

First floor construction to comprise:

Scandinavian triple glazed windows and doors

I Joist Floor framing system

Full factory finishing inside and out, paint or stain

22 x 70 counter batten to underside of ceilings


Glazing ‘U’ value of 1.1W/m

Plasterboard to underside of ceilings


Contact with past customers



High quality insulation to floor voids


Frame designed, engineered and manufactured in the UK


22mm weatherdeck flooring to first floor



Roof construction to comprise:  

Full architectural design service including planning applications

  I Joist roof framing system


Building Regulation submissions

  OR Trussed rafter roof construction 

Topographical site surveys

  Fascias, bargeboards, eaves vents and soffits

Central vacuuming systems

  Breathable roofing membrane fixed with counter battens

Choice of insulation materials



Scandinavian specification conservatories



External balconies, balustrading and sun decks





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