Cost: external wall insulation with render
Compare matching areas, thermal targets and equivalent junctions. Identify wall preparation, insulation, fixings, render layers, scaffolding and sill adaptations. A panel price does not represent the completed façade.
Editorial update on 18 September 2026
Compare system and target
List insulation, thickness, performance target, fixings and finish for each offer. Ask for explanations of differences. Do not compare area prices assuming all panels and junctions are equivalent.
Price preparation and details
Separate repairs, removal, reveals, sills, plinth and roof connections. Clarify relocation of pipes, shutters and accessories. Request areas and opening measurement rules.
Separate full cost and grant
Check access, protection, waste, inspections and finishing. Identify options and exclusions. For a grant, request the scheme, eligible expenditure and application status; do not deduct an unconfirmed estimate from the contractual cost.
The three budget levels
Where your money goes
- SubstrateOn quotationAssessment, removal and repairs.
- SystemOn quotationInsulation, fixings and render.
- DetailsOn quotationOpenings, sills and plinth.
- SiteOn quotationAccess, protection and handover.
What makes the price vary
Performance
Build-up and project calculation.
Substrate
Preparation and fixing design.
Geometry
Openings and junctions.
Constraints
Access, boundaries and equipment.
Indicative scenarios
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Does one thickness guarantee Klimabonus?
No. Material, performance, other criteria and the procedure must also match the applicable scheme.
Does EPS automatically suit my project?
Check the system, building requirements and any grant. A general recommendation is insufficient.
Can every window sill remain?
Adaptation depends on the new build-up and junctions. Have it specified.
Does external insulation remove every thermal bridge?
Not automatically. Details and untreated areas require assessment.
Can equipment be attached later?
Clarify system- and load-appropriate fixings and protection against water entry before installation.
Your exact price, in 2 minutes
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