Can HebHomes change specification or materials?

We can substitute equivalent or better specification without material detriment; significant changes require client agreement.

What happens if weather or site issues delay erection?

Programme is weather‑dependent; poor conditions can add time and handling; price may change if delays/extra handling occur.

How long to weather‑tight?

Typically 1–3 weeks depending on size, complexity and weather.

Are pallets/packaging removed?

Packaging becomes the buyer’s property unless stated; provide skips for waste.

What if I need to change design after Stage 2?

Additional work is recorded and charged hourly. Prices reviewed at each stage; steel priced after Stage 2 engineering.

VAT excluded unless installation supply applies; added at the applicable rate when due.

What approvals/guarantees apply?

Hemsec SIP / Sigma II are BBA‑approved; manufacturer product guarantees apply; systems widely lender‑accepted.

What documents do I receive for erection?

Manufacturing and assembly drawings; method statements; on‑site QA and handover documentation.

Supply or Supply & Erect Service

Q: Is CPS (Sigma® II) available as Supply only?

No. CPS is supplied only with Supply & Erect.

Q: Can I purchase SIPs as Supply only?

Technically possible, but not advisable. Use Supply & Erect with specialist teams.

Q: What access and ground conditions are required?

Access for 12m artic / 15m trailer; 2‑hour offload; 14‑ton hardstanding; 3m perimeter hardstanding (~5‑ton); base level ±10mm; clear working area; pre‑assembly area if needed.

Q: What are site hours and notifications?

08:30–18:30 Monday–Saturday or as agreed. Notify us of unusual site constraints in advance.

Q: Do you provide foundation design or SER certification?

No. HebHomes provides kit drawings and calcs only. Client’s engineer/agent provides foundations and certification. Planning & Warrant available under a separate contract.

At a glance: For quality, warranty and lender confidence, our default delivery route is Supply & Erect. CPS (Sigma® II) is provided only as Supply & Erect. SIPs supply-only is not advisable due to specialist tolerances and air‑tightness sequencing.

Supply & Erect (recommended): Kit plus erection by approved team; QA sign‑off enables warranties.
Supply only (limited cases): Kit delivered only; you or your contractor manage erection. VAT will be charged but can be claimed back.

Scope — what’s included

Supply only

Factory manufacture of the superstructure per approved drawings/specification.
Insulation within structure
Rooflights
External doors and windows
Membranes
Internal partitions
Delivery to site with manufacturing/assembly drawings and factory QA documentation.

Supply & Erect

Everything in Supply, plus erection by an approved team (method statements, risk assessments, lift plan and programme).
Setting‑out checks, tolerance control, membranes/tapes to spec and weather‑tight shell to the agreed stage.
On‑site QA checklists, sign‑off and warranty enablement; two HebHomes site visits (pre‑delivery and handover).

Stage payments

Milestone	Supply only	Supply & Erect
Deposit	£950 (non‑refundable)	£950 (non‑refundable)
Stage 01 — Building Warrant Draft	10% (cumulative 10%)	10% (cumulative 10%)
Stage 02 — Building Warrant Final	10% (cumulative 20%)	10% (cumulative 20%)
Stage 03 — Window Order	20% (cumulative 40%)	20% (cumulative 40%)
Stage 04 — Prior to Kit Manufacture	60% (cumulative 100%)	40% (cumulative 80%)
Stage 05 — Delivery / First Load	Expenses invoice at delivery	17.5% (cumulative 97.5%)
Stage 06 — Post Erection	—	2.5% (cumulative 100%)
Stage 07 — Expenses	—	Expenses invoice

Payments due within 5 days of invoice unless stated otherwise.
Prices provisional until engineering/site information known; reviewed at each stage.
Steel confirmed after Stage 2; budget valid 3 months from issue.
VAT excluded unless installation supply applies.
Late payment may trigger interest; goods not dispatched if terms unmet.
Cancellation fee 10% after Stage 2, plus costs incurred.

Responsibilities & interfaces

Client / Principal Contractor provides

Site access for 12m articulated lorry / 15m trailer; off‑loading within 2 hours; Buyer responsible for off‑load facilities.
Lay‑down & hardstanding: 14‑ton axle load area for panels/insulation; 3m perimeter hardstanding (≈5‑ton axle load) around base; pre‑assembly area if roof panels require.
Foundations: correctly constructed; slab/base levelled to within ±10mm; setting‑out to agreed datum.
Full external perimeter scaffold (3 sides prior to start, fourth before roof install) to erection team’s acceptance; unsafe scaffold must be replaced.
Welfare (toilet, drying, canteen), power (240v or min. 7.5KVA generator; diesel by client), skips, security and traffic management.
Telehandler/crane for lifts (charged at cost if arranged by HebHomes); 5m mobile towers (2m & 3m configs); compliant fall‑protection system (e.g., G‑deck).
Access hours 08:30–18:30 Mon–Sat unless otherwise agreed; inform HebHomes of unusual site features/constraints.

HebHomes / Erection Team provides

Trained site labour; method statements; risk assessments; programme; lift plan; specialist tools/equipment (transformer 110v, compressor, air tools).
Manufacturing/assembly drawings and on‑site QA; pre‑delivery inspection and post‑erection handover visit.
Installation to our programme and construction drawings; weather‑dependent sequencing.

Ownership, guarantees & approvals

Ownership transfers on delivery (Supply only) or post‑erection handover (Supply & Erect), once paid in full.
Hemsec SIP / Sigma II are BBA‑approved; manufacturer product guarantees apply.
Liability cap: £500,000 (excluding personal injury/death). No liability for consequential loss.
Design obligations: HebHomes provides kit working drawings & structural calcs for the kit; client’s engineer must certify foundations and non‑kit elements.
Draft SAP provided for warrant; EPC can be provided at completion (additional fee).

Common Questions

Is CPS available as Supply Only? ›

No. CPS is supplied only with Supply & Erect.

Can I purchase SIPs as Supply only? ›

Technically possible, but not advisable. Use Supply & Erect with specialist teams.

When are payments due? ›

Deposit, then staged invoices at Warrant Draft/Final, Window Order, prior to Manufacture, Delivery/First Load, Post‑Erection, plus an expenses invoice. Payments due within 5 days of invoice unless otherwise stated.

What access and ground conditions are required? ›

Access for a 12m artic / 15m trailer; off‑load within 2 hours; 14‑ton hardstanding lay‑down; 3m perimeter hardstanding (~5‑ton); base level ±10mm; clear working area and pre‑assembly area if needed.

Who provides scaffold, welfare, power and crane/telehandler? ›

Client provides scaffold, welfare, power, skips and crane/telehandler (or we arrange at cost). Under S&E we agree interfaces at Pre‑Start; our team prepares the lift plan and supervises lifts.

What base tolerance is required? ›

Slab/base levelled to within ±10mm; foundations by client’s engineer; setting‑out to agreed datum.

What are site hours and notifications? ›

08:30–18:30 Monday–Saturday or as agreed. Tell us about any unusual site constraints in advance.

Are travel, accommodation and telehandler/crane included? ›

No. Excluded and charged at cost (or provided by the client). Estimate issued after Stage 2; reconciled post‑erection.

When does ownership transfer and who insures? ›

Client insures from delivery. Ownership transfers at delivery (Supply only) or at handover (S&E) once paid as per contract.

Do you provide foundation design or SER certification? ›

No. We provide kit drawings and calcs only. Your engineer/agent provides foundations and certification. Planning & Warrant available under a separate contract.

What’s included in the CPS kit under Supply & Erect — CPS (Closed Panel System)? ›

Ground & first floor: DPC (under wall plate), perimeter soleplate, floor cassette with 254mm posi‑joists, 22mm MR T&G chipboard factory‑fitted, rim board.
External walls (closed panel): 47×235mm I‑Studs fully filled with blown‑fibre insulation; 9mm OSB both faces; 25×38mm internal service battens; foam air seals to head/base/joints; breather membrane factory‑fitted (reflective/UV‑stable per finish); all fixings.
Internal load‑bearing walls: prefabricated panels with 38×89mm CLS studs, OSB lining to one side where required by the structural engineer.
Roof (habitable zones): roof cassette panels with 300mm I‑Studs filled with mineral wool; 9mm OSB both faces; 25×38mm internal service battens; external roofing membrane.
Single‑storey roofs: fink trusses + sarking/OSB (to engineer specification).
Openings: windows & external doors to the project schedule (installed under S&E); rooflights with flashings/thermal collars supplied, not installed.
Ancillaries: structural posts/beams as required; steelwork/trusses as designed (confirmed after engineering).
Vapour control (CPS): no VCL required to walls—use foil‑backed plasterboard; strips fitted behind junctions to enable later continuity at coomb/joins.

What’s included in the SIP kit under Supply & Erect — SIP (Structural Insulated Panels)? ›

Ground & first floor: DPC (under wall plate), perimeter soleplate; metal‑web floor joists with hangers; 22mm MR T&G chipboard; rim board.
External walls (Hemsec SIP): c.150mm SIPs with solid timber splines; OSB full face internally & externally; breather membrane (e.g., TF200 Thermo or Tyvek UV facade) and all SIP fixings.
Internal load‑bearing walls: SIP load‑bearing panels and sheathed studs to engineer design.
Roof (habitable zones): SIP roof panels (typically 150mm; 175mm if required) with roofing membrane (e.g., VP400) and fixings.
Single‑storey roofs: fink trusses + sarking/OSB where applicable.
Openings: windows & external doors to the project schedule (installed under S&E); rooflights with flashings/thermal collars supplied, not installed.
Ancillaries: structural posts/beams as required; steelwork/trusses as designed (confirmed after engineering).
Vapour control (SIP): VCL (foil & tape) supplied, not installed; strips fitted behind external junctions so the VCL can be completed after kit erection.

What’s not included in the kit?
›

Groundworks/sub‑structure, cladding, final roof coverings,external battens/, ties to block/brick, firestops.
Non‑structural bulkheads, false ceilings, decking.
Steel - charged at cost
Scaffold, welfare, power, skips; transport/accommodation/subsistence; telehandler/crane (charged at cost if we arrange).

Under S&E, all listed kit elements are installed unless marked “supplied, not installed” above.

Next steps

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