Home insulation, in the right order
Cold floors, draughty walls or a loft that is unusable in summer? We insulate roofs, lofts, floors and walls, and take care of ventilation so you do not end up with damp. As a standalone job or as part of a renovation, by one in-house team from Rotterdam, in English.
Warmer, quieter and cheaper to heat, without damp
Insulation pays off most when the measures fit together. An insulated roof above a cold, draughty floor still feels cold. An airtight house without proper ventilation becomes damp. So we look at the whole home first and advise the order that suits it: what gives the most comfort, and what can be done right away?
Many insulation jobs are standalone: a loft or roof from the inside, a floor from the crawl space, an insulated lining against a cold wall. If you are renovating anyway, we include it in the same schedule, so the house is opened up and finished only once.
Request insulation adviceOne in-house team
Our own tradespeople for insulation, carpentry and finishing. One point of contact.
A clear price up front
A quotation per measure, so you can decide what happens first.
Insulation and ventilation
With every measure we check airflow and the vapour control layer.
Help with the subsidy
We supply the invoices, photos and specifications the ISDE application needs.
Insulation in our projects
Insulation is part of almost every project we deliver. A few where it played a leading role.
What our clients say
Would you like a result like this at home?
Tell us what you have in mind. You get a free quote, usually within one working day.
Every layer of your home, with the right method
For each part of the house we choose the method that suits it. Follow the links for more background.
Roof and loft
From the inside between the rafters, from the outside under new tiles, or only the loft floor.
Flat roof
Preferably on the outside, together with a new roof covering.
Floor and crawl space
Boards or spray insulation under the floor, or crawl space ground insulation if it is too low.
Cavity walls
Filling the cavity, after we have checked the facade and the pointing.
Solid walls
An insulated lining on the inside, with careful attention to damp. Read our guide on insulating old Dutch houses.
Sound insulation
Decoupled walls, ceilings and floors against noise from the neighbours, often required by the VvE.
Glazing and window frames
HR++ or triple glazing and new frames: the link most often forgotten.
Ventilation and damp
Once a house is insulated, ventilation is no longer optional.
Heat pumps
Insulate first, then change the heating. Read our heat pump guide.
Work out what insulating your home will cost
Choose the size and finish level and see a guide price straight away, including VAT. In the full calculator you add options and request a quote.
- Guide prices for the Randstad in 2026
- Three finish levels, from basic to premium
- Your final price follows after a visit
How we insulate your home
Five steps, from survey to the paperwork for your subsidy application.
Survey and advice
We look at roof, floor, walls, glazing and ventilation and advise the order that pays off most.
Quotation per measure
A clear quotation per part, including the insulation value we install.
Preparation
Crawl space access, loft cleared, pipes and ventilation mapped.
Insulate and finish
Insulation, vapour control layer and finishing in one go, by our own team.
Handover and subsidy
We hand over the invoices, photos and specifications for the ISDE application.
What would insulation cost at your place?
Tell us briefly about your home and your plans. You get a free quote, usually within one working day, with no obligation.
- A clear price up front, extra work always agreed first
- Carried out by our own team, no subcontractors
- One year of guarantee on the work
Our own team, no subcontractors
Your entire job handled by our own 20 to 30 craftsmen. Short lines, one point of contact.
One price up front, no surprises
You know where you stand from the outset. No unexpected extra costs afterwards.
1-year guarantee on the renovation
We stand behind our work and are only finished when you are satisfied.
Insulation in Rotterdam and across the Randstad
Rotterdamse Bouwbedrijf is based in Rotterdam and insulates homes across the Randstad: from pre-war buildings in Rotterdam and The Hague to post-war terraced houses in Capelle, Barendrecht and Zoetermeer. If your town is not listed, just get in touch.
And also in, among others
We work with reliable A-brands, for a durable result with a manufacturer's warranty.
Questions about home insulation
Where should I start insulating?
Can I insulate without renovating?
Is there a subsidy for insulation?
Do you do cavity wall insulation?
What if my crawl space is too low or too damp?
Should I insulate first or install a heat pump first?
Can insulation cause damp?
Can a listed building be insulated?
Do you work in English?
Do you work outside Rotterdam?
Ready to insulate your home?
Book a free survey. We look at where your home loses heat, advise the order and draw up a plan with a clear price per measure.
Insulating a Dutch home: what a contractor tells you first
Insulation is not complicated, but the details decide whether you enjoy it for decades or find mould behind the wall after two winters. These are the points we check in every home.
The order that pays off
Most homes lose most heat through the roof, then through windows, walls and floor. The logical order is therefore roof or loft, glazing, walls, floor, with ventilation at every step. Only once the shell is in order does new heating such as a heat pump make sense. See our heat pump guide.
Roof and loft
A pitched roof is usually insulated from the inside, between and under the rafters, with a vapour control layer on the warm side. If the tiles are coming off anyway, insulating from the outside with roof panels keeps the loft free. If the loft is only used for storage, insulating the loft floor is the quickest win.
Floor and crawl space
A cold floor is insulated from the crawl space, with boards between or under the joists or with spray insulation. That needs enough height. If the crawl space is too low or wet, ground insulation is often better, after the cause of the damp has been dealt with.
Walls: cavity, inside or outside
If your home has an empty cavity, filling it is usually the simplest step, once we have checked that the cavity is clean and the pointing keeps rain out. Solid walls in pre-war buildings are insulated on the inside with an insulated lining, or on the outside when the facade is being renovated. See our page on facade renovation and insulating an old Dutch house without causing damp.
Glazing and window frames
Single glazing and draughty frames undo much of the insulation elsewhere. HR++ glazing is the logical step in most homes; triple glazing needs frames designed for the weight. See window frames.
Subsidy, VAT and the energy label
Owner-occupiers can often apply for the ISDE subsidy for insulation, with minimum areas and insulation values per measure. Labour for insulating homes older than two years is charged at the reduced VAT rate. Rules change regularly, so check the current position. Better insulation also improves the energy label; see Dutch energy labels explained.
Common insulation mistakes
- Insulating without a vapour control layer or ventilation, causing condensation and mould.
- Insulating a damp crawl space before the cause of the damp is fixed.
- Filling a cavity while the pointing leaks.
- Installing a heat pump before the shell is insulated.
Renovating anyway? We include insulation in a full home renovation, a dormer or a roof extension.