Overview
The Burt Boulton house is a distinctive form of non-traditional, system-built housing developed in the mid-1970s. Designed by H K Harwood and manufactured by Burt Boulton Ltd, these properties were primarily constructed around 1975 and reflect the experimental building approaches adopted during that period.
They were produced in a range of layouts, including bungalows and two-storey detached, semi-detached, and terraced houses, allowing the system to be applied across a variety of residential settings.
Typical characteristics & construction
Burt Boulton houses are formed using a volumetric box construction system. Storey-height timber frame units were prefabricated and assembled on site over traditional concrete strip foundations.
Roofs are generally shallow pitch gable or monopitch in form, covered with tiles or bituminous felt. Some variants incorporate flat roofs finished with bituminous felt coverings.
External walls commonly comprise rendered plywood, either across the full elevation or up to first floor level with tile hanging above. A recurring identifying feature is a panel of horizontal or vertical timber boarding adjacent to the front entrance.
| Element | Typical construction | Inspection focus |
|---|---|---|
| Substructure | Concrete strip footings with vented brick underbuilding and DPC | Signs of settlement, moisture bridging, ventilation |
| External walls | Timber frame with rendered plywood and tile hanging | Moisture ingress, panel condition, fixings |
| Separating walls | Timber frame with asbestos cement backing and plasterboard lining | Asbestos management, integrity of linings |
| Floors | Plywood decking on timber joists | Deflection, moisture damage, decay |
| Roof | Timber rafters, plywood decking, bituminous felt or tiles | Covering condition, water ingress, detailing |
Potential hazards & inspection priorities
The most significant risks in Burt Boulton houses relate to moisture management and the durability of timber and plywood components. Deterioration of rendered plywood can allow water penetration, leading to concealed decay within the timber frame.
Asbestos cement sheets are present within separating wall construction. These do not present a risk when intact and undisturbed but require appropriate management and professional handling if works are proposed.
Timber-framed elements should be assessed for signs of rot or insect infestation, particularly where historic moisture ingress may have occurred.
Is this house right for you?
A Burt Boulton house may be suitable for purchasers who understand non-traditional construction and are prepared to assess condition on a case-by-case basis rather than relying on age alone.
- Commission a full building survey
- Review evidence of maintenance and repairs
- Consider long-term management of original materials
Careful assessment is particularly important where original external wall finishes and roof coverings remain in place.
Mortgage & resale considerations
Mortgage acceptance for Burt Boulton houses can vary between lenders and is influenced by construction type, condition, and the quality of professional reporting.
Clear survey findings, evidence of appropriate maintenance, and the absence of unresolved moisture or structural issues are commonly relevant factors.
What a survey can — and cannot — tell you
A building survey provides an informed assessment of the visible condition and construction of a Burt Boulton house. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.
- Identify visible defects to timber frame and plywood wall systems
- Assess signs of dampness, moisture ingress, and condensation risk
- Comment on roof coverings, drainage details, and external envelope condition
- Review the general condition of accessible floors, ceilings, and structural elements
- Highlight defects that may require repair, monitoring, or further investigation
However, there are limitations to what a survey can determine without intrusive investigation.
- Confirm the condition of concealed timber framing
- Assess hidden elements behind linings or finishes
- Determine the full extent of concealed decay or moisture damage
- Inspect areas that are inaccessible or covered at the time of inspection
Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.
