CPS explained

Our closed-panel system combines factory preparation with an insulated timber structure, ready for specialist erection.

More preparation
in the factory.

Our CPS uses Donaldson Timber Systems’ Sigma® II technology, with blown glass-wool insulation within the timber frame. It suits clients wanting to avoid rigid foam wall insulation, while bringing more of the construction together in the factory.

How the panel works

Sigma II wall cutaway from the HebHomes website — Sigma II wall cutaway showing the insulated timber frame and wall layers. Masonry cladding is illustrated; finishes follow the project specification.

Key to the numbered wall illustration

Original HebHomes key identifying the nine numbered wall layers, from internal plasterboard to external masonry cladding

Why choose CPS?

Glass-wool insulation

The CPS wall uses blown glass wool rather than the rigid foam insulation found in SIP construction. This material choice is a primary reason many clients prefer CPS.

Less work on site

Factory-fitted insulation and panel preparation reduce follow-on work, with the service zone keeping services separate from the insulated structure.

Plan the installation early

CPS requires suitable crane access and setup space. The crane and any access preparation can increase plant and site costs.

Does choosing CPS make the entire house foam-free?

The material choice described here concerns the CPS wall system. Insulation elsewhere, including the floor, roof and any additional components, must be checked against the full project specification.

Does CPS suit every site?

CPS needs suitable crane access and a workable lifting position. Where this is difficult or would add substantial plant costs, SIP may be the more practical choice.

What work remains after the kit is erected?

Your agreed Supply + Erect specification identifies the handover stage. Completing the home includes further work by your appointed contractor or trades.

What does BOPAS accreditation mean?

Donaldson is listed as BOPAS+ accredited for its Sigma II system, with a 60-year durability assessment. This is distinct from the structural warranty arranged for your home.

Certification and your home warranty

System certification provides evidence about a specified construction system. The structural warranty for your individual home is arranged separately, and your lender confirms whether the proposed construction and warranty meet its requirements.