Joost van der Waal

Laat dampopen isolatie vocht door?

Veel mensen denken dat dampopen isolatie vocht binnenlaat en zo schimmel veroorzaakt. Het tegendeel is waar. Dampopen gaat over waterdamp, niet over regen of tocht, en een goede dampopen opbouw is gewoon luchtdicht. Dit artikel legt het verschil uit tussen het dauwpunt, de temperatuur waarbij vocht neerslaat, en het condensatievlak, de plek in je muur of dak waar dat gebeurt. Je leest waarom natuurlijke materialen vocht bufferen en laten terugdrogen in plaats van opsluiten, en met welke vier vragen je een installateur ontmaskert die het verschil niet kent.

Binnenzijde gevelisolatie: PIR vs. biobased

Dampopen bouwen: waarom een ademende schil bouwfysisch logischer is

Wat is dampopen bouwen, waarom werkt het beter dan dampdicht en hoe pas je het toe in nieuwbouw en renovatie. Bouwfysisch onderbouwd door Isoleerbewust.

Crawl space insulation: Watch out for these 6 common problems

Are slippers a must-have in your home due to cold floors? Little to no insulation under your floor or in the crawl space can make your floor feel icy cold. If you want to insulate your crawl space, there are a number of common problems...

Cellulose Insulation: Advantages and Disadvantages

Cellulose insulation is the oldest form of domestic insulation and is still found in homes today. Nowadays, it is primarily blown under high pressure into hollow structures such as floors, (partition) walls, roofs, and internal facades.

Wood Fibre Insulation: Advantages and Disadvantages

Wood fibre insulation is made from residual streams from sawmills. Wood fibre insulation has a high heat storage capacity, which ensures that it keeps the heat out for a long time in the summer. In addition, wood fibre insulation is: breathable, easy...

Biobased insulation

Insulation, if done right, is a one-time job. Therefore, choose wisely and learn about the advantages and disadvantages of biobased insulation.

Insulating your ceiling: these are your options

Replacing and insulating a ceiling between joists · Insulating a ceiling without demolition · Attaching a rigid insulation board directly to the ceiling or floor

Vapour-retarding foil: to use or not to use?

Vapour-retarding foil is recommended when insulating from the inside. This prevents mold and wood rot. This article explains why.

Wat betekent het om biobased isolatie gecommitteerd te zijn?

Overstappen op biobased isolatie als aannemer (zonder je hele werkwijze om te gooien)

Steeds meer aannemers krijgen ermee te maken. Biobased isolatie. Vanuit architecten. Vanuit opdrachtgevers. Vanuit regelgeving. En toch zien we vaak dezelfde reactie: “Interessant… maar niet voor nu.” En dat is logisch.

Why biobased insulation is cut back (and how to prevent it)

Ecological insulation vs conventional insulation: what is truly the best choice?

On paper, it seems a simple trade-off between price and sustainability. In practice, it's about comfort, health, building physics, and how your home performs over the next 30 years.

Does biobased insulation attract mice?

No. Mice are not attracted to biobased insulation, but to warmth, shelter, and access to a home. That's the short version. Yet this question keeps coming up. Logically so. Because the idea that "natural materials" attract animals feels intuitively true. Straw, wood fibre or cellulose simply sounds more appealing to an animal than glass wool or plastic.

Insulation Grant 2026: Amounts, Mistakes and Real Applications

How much grant will you receive for insulation in 2026? Real examples, amounts per measure, common mistakes and explained step by step.

Why we don't visit immediately after an insulation enquiry

This is almost always the first question we get: "When can you visit?" Yet, we deliberately don't do so straight away. And for many people, that feels illogical at first. In construction, you're used to a contractor first assessing the situation and then providing a quote. But with insulation, this often backfires.

Insulation Payback Period: The Biggest Lie That Costs You Money

In practice, it's more nuanced. Insulation can certainly be profitable, but the outcome varies greatly per home. Yet, these differences are rarely mentioned. This creates expectations that do not always align with reality. That is precisely why some homeowners are disappointed after an insulation measure, even though the execution was technically sound.

Are there risks if you insulate only part of your home with inner wall insulation?

Partial insulation with inner walls can pose risks, but only in specific situations. It mainly depends on where, how much, and how well you insulate.

How do I choose an insulation company?

How to choose an insulation company? Follow these 5 steps: 1. Don't randomly request quotes 2. Check reputation and continuity 3. Compare transparent costs 4. The initial meeting is crucial 5. Make communication and expectations explicit

9 Disadvantages of Biobased Insulation (and Possible Solutions)

Besides their many advantages, biobased insulation materials also have some disadvantages that you should consider before purchasing. Fortunately, most problems can be easily prevented or solved.

Rc-Value Explained: What Does It Mean for Your Energy Bill?

The Rc-value is important for a building's energy efficiency. A well-insulated building with a high Rc-value requires less energy to maintain a comfortable temperature than a building with a low Rc-value.

Biobased Insulation and Pests: Facts and Myths Debunked

Concerns about pests in biobased insulation? Discover effective solutions and make an informed choice. Click here!

What are purlins? Handy to know when insulating

Want to insulate your roof? First, learn all about purlins! Discover their importance, insulation methods, and material choices. Start saving energy now!

Different Types of Insulation Materials

Insulation materials come in various forms and types. These include ecological insulation materials derived from agriculture or forestry, as well as insulation materials originating from petrochemicals or mineral sources.

Roof Insulation

Unless your home was built for energy efficiency, you can very likely reduce your monthly energy bill by adding or updating roof insulation. But which type of insulation material is best for insulating your roof?

What about the fire safety of biobased insulation materials?

Are you unsure if biobased insulation is fire-safe? This article explains how to safely apply materials like hemp and wood fiber in roofs, floors, and walls.

My contractor is not enthusiastic about biobased insulation, what can I do now?

Is your contractor not enthusiastic about biobased insulation? Discover why in this blog. And what you should and shouldn't do now.

What is biobased insulation?

What is biobased insulation? And what is the difference between it and ecological or natural insulation?

Can biobased insulation also be applied in my home?

Is your home suitable for biobased insulation? Read all about its application, including for damp walls, and how natural materials buffer moisture.

U-value of window frames and glass

Do you want to insulate your home effectively? Learn everything about U-value and make the right choices in terms of window frames and glazing for maximum energy savings.

Insulating a single-skin wall

Discover how to insulate a single-skin wall with sustainable biobased materials. Read all about the benefits, methods, and practical tips in this comprehensive blog post.

The 5 Most Common Mistakes When Insulating Your Own Roof

Insulating your own roof? With these practical tips and common pitfalls, you will be well-prepared. Save on heating costs and increase your living comfort!

What does biobased insulation cost? A price comparison

How expensive is insulating with wood fiber, flax, or sheep's wool? We list the prices of biobased insulation materials and help you save.

Biobased blown-in insulation vs. Tonzon floor insulation

Discover the differences in costs, insulation value, insulation method, and subsidies so you can make the right choice for your floor insulation.

109 Mind-Boggling (and Sometimes Funny) Dilemma Questions About Sustainability in 2024

Dilemma questions: Home - Energy-efficient new-build home or a poorly insulated existing home? - Insulate your home with glass wool, rock wool, PIR or PUR, or with wood fiber, hemp, flax, grass, straw, cellulose?

Best Insulation Material (2024): healthy, eco-friendly and good heat protection

Which natural insulation material is truly the best choice? To answer this effectively, I've created different categories, each with a single winner. You can use these criteria when selecting the right natural insulation material...

How to insulate your home in 2024?

Prevent damage to your health and the environment. Don't make the same mistakes as 80 percent of homeowners when insulating their homes.

Phase Shift

Phase shift indicates how long it takes for heat to pass through a material. Phase shift is the time between the peak external temperature and the peak internal temperature, expressed in hours. This value depends, among other factors, on the insulation thickness...

What Does Ecological Insulation REALLY Cost?

Will you opt for cheap or choose a healthier and more sustainable approach?

Insulating your Attic: Your Options

It's so cold on the top floor that you're considering insulating your roof. But perhaps insulating your attic floor is a better choice in your situation...

Easily calculate the surface area of a slanted roof

Easily calculate the surface area of a slanted roof, even if you can't access all areas: floor area x multiplication factor of the roof pitch.

What are the 4 best ecological insulation companies in the Netherlands?

We help you find a local specialist to ecologically insulate your home.

What is the alternative to PUR foam for sealing gaps? The 7 best options

What are the alternatives to PUR foam for sealing gaps? The 7 best options · 1. Stopwool · 2. Spray Cork · 3. Hemp Caulk · 4. Airtight tape

Internal Pitched Roof Insulation

It is quite straightforward to insulate your pitched roof from the inside. Your roof covering can remain in place, which can save you a lot of money. Plus, you are not dependent on the weather.

Wood Fibre Board

Wood fibre board is a robust ecological insulation material that insulates well in both winter and summer. Wood fibre boards can be used in roofs, facades, and floors. It is often used as a finish for walls and facades.

Grass fibre insulation: advantages and disadvantages

Grass fibre insulation is made from residual material from mown grass and recycled jute fibres originating from nature reserves of Natuurmonumenten (NL) and Natuurpunt Flanders (BE) that would otherwise not be used as animal fodder.

5 Sustainable Alternatives to Glass Wool and Rock Wool

With the rising prices of glass wool and rock wool and the increasing importance of ecological considerations, you're looking for a sustainable alternative. The best option for you depends on factors like your budget and the current state of your house.

Gypsum plasterboard vs. wood fibre board

Gypsum plasterboard is often cheaper, but wood fibre board can also be counted as insulation for subsidies. In this article, you will learn all the pros and cons of the two finishing options.

What is meant by

Centre-to-centre (c.t.c.) is a method for indicating

Installing Floor Insulation via the Crawl Space

Insulating your crawl space yourself? This can easily be done by installing floor insulation via the crawl space. In this article, you will learn everything step by step.

Floor insulation costs: save money and increase your comfort!

Floor insulation is an important part of home insulation. It not only creates a comfortable living environment but can also help to save energy. When considering floor insulation, however, it is important to take the costs into acc

Lambda Value

The lambda value (λ) is one of the most commonly used values for insulation materials. It is also known as thermal conductivity or thermal conduction coefficient. It indicates the insulation value, also referred to as the thermal conductivity of materials.

What is an Rd-value?

The Rd-value is a measure of thermal insulation used for buildings. It is important to understand how it works when planning your construction project. Discover everything you need to know about the Rd-value in this article.

Ecological Insulation Materials

Ecological insulation materials are generally made from plant fibres such as: hemp, flax, wood, algae and grass. In addition, sheep's wool, cellulose, cork, loam and straw, for example, can also be used as natural...

DIY Insulation vs. Professional Home Insulation

In many cases, ecological insulation materials are perfectly suitable for DIY installation as they don't require special tools or protective equipment. However, if you want to install ecological insulation yourself, we do recommend finding an experienced...

Vapour-permeable membrane: what is it?

Vapour-permeable membrane allows moisture to escape from the building structure. This prevents condensation and thus mould in your structure and insulation materials. This membrane is often wind and rainproof. The structure must always be vapour-permeable towards the exterior.

5 Things to Do When Your House is Too Hot or Too Cold

It's either far too hot or far too cold, and maintaining a constant temperature is simply not feasible right now. You've tried all the tricks, from ice in front of your fan to having wool blankets in every room, so it's time to find new...

7 Points to Consider for Insulation Quotes

Before receiving price indications and quotes from contractors for insulating your home, you should focus on a limited number of contractors you feel comfortable choosing from. In this article, we explain what to look out for in a quote.

9 things to consider when looking for biobased insulation

Are you looking for biobased insulation and wondering if it is for you? Whether you are a homeowner or property owner, this article is designed to tell you more about biobased insulation.

What is a good insulation thickness?

You probably think the thicker I insulate, the better.

Is it advisable to use ground foil in my crawl space?

Ground foil is mainly used to prevent excessive moisture in your crawl space. You naturally want to avoid too much moisture getting into your crawl space, as this can cause a lot of problems.

What are the advantages and disadvantages of cavity wall insulation?

You suspect your house has a cavity wall. You heard this from a neighbour. It seems like a good option to make your home more sustainable and not lose space to insulation. You are now wondering if this will be beneficial and what it will cost.

What is airtight construction?

Airtight construction can be compared to a windstopper or raincoat that prevents the wind from blowing warm air out of your wool jumper. But be aware that your raincoat needs to be breathable, or vapour-open, otherwise, you'll still get wet from sweat.

Why choose ecological insulation?

Natural or ecological insulation materials have a positive impact on nature, people and the environment. They are made from renewable and cultivable raw materials, thus enabling the full closure of raw material cycles....

What is the best insulation?

Insulation is the most effective way to save energy. With high gas prices, the investment in insulation pays for itself even faster. More and more people are choosing to insulate their homes, also because making your home more sustainable is an increasingly important societal issue. But what is the best insulation material?

Flax insulation: advantages and disadvantages

Flax insulation is a by-product of the linen industry. Companies such as Isovlas produce this type of insulation material. Flax insulation is one of the best-known natural insulation materials and is available through many different sales channels.

Is my house suitable for insulation?

If you want to insulate your house, it is good to know whether your spent euro on insulation measures and other sustainability measures is a good investment. This depends, among other things, on the year of construction, type of house and what insulation is already present.

Heat Storage Capacity

The higher the heat storage capacity (also known as thermal capacity), the greater the material's ability to store heat. This means the house stays cooler during hot summers because not all the heat penetrates indoors.

Vapour Diffusion Resistance

The vapour diffusion resistance (µ) indicates the extent to which a material allows water vapour to pass through. The lower the vapour diffusion resistance, the more vapour-permeable the material. And the less resistance the water vapour will experience in passing through the material.