What is the difference between airtight and watertight?

Airtight prevents draughts and energy loss, watertight prevents moisture infiltration. We address both for a complete solution.

What is a blower door test?

An airtightness test that is mandatory for new construction for the EPB score. We ensure your connections pass this test.

Is airtight construction mandatory?

For new construction, strict EPB standards apply and a blower door test is mandatory. For renovation, it's not required, but you can save up to 30% on energy costs and improve living comfort.

What are cold bridges?

Areas where heat escapes faster, often due to poor sealing. This leads to condensation and moisture problems.

How long does execution take?

Usually 1-2 working days. For larger projects, we plan multiple days with minimal disruption.

Can I combine with other repairs?

Yes, we often combine with film repair or relacquering. This way you tackle your entire exterior in one go.

Airtight & watertight construction

Draughts, moisture or cold air around your windows or doors? At Noevo, we provide a perfect airtight and watertight finish – tailored to your project, with durable materials and a 10-year warranty.

In brief

Airtight & watertight construction in brief

Airtight & watertight construction prevents draughts, moisture ingress and energy loss around windows, doors and facade joints. Noevo locates leaks, selects the right combination of EPDM, SIGA tape, PEC or sealant and finishes each connection durably with 10-year warranty.

The problem

30% of energy loss in buildings is due to poor sealing. Cold bridges, air leaks and moisture problems lead to an unstable indoor climate, higher energy costs and a lower EPB score. Correct airtightness is essential for both renovation and new construction.

Our solution

Our approach starts with an on-site visit to locate leaks. Based on your situation, we choose the right technique for an airtight and watertight finish. No demolition work, no complete replacement – just a durable solution with a 10-year warranty.

Before & after sealing

From leaks to comfort – see the result of professional sealing

Before

After

Benefits of sealing

10-year warranty on adhesion and material choice

Lower energy costs and better EPB score

SIGA tape, EPDM, PEC and sealant customized to your needs

Suitable for both renovation and new construction

Fast execution, minimal disruption

One expert for waterproofing, airtightness and joinery repair

Our work process

Site visit & analysis

We visit on-site to locate leaks and determine the right technique.

Custom quote

You receive a clear quote with materials and approach.

Expert execution

EPDM, SIGA tape, PEC or sealant – depending on your situation.

Check & delivery

Result tested and guaranteed for 10 years.

Materials we use

EPDM membranes: Waterproof membranes under and around windows against infiltration
PEC membranes: Water-resistant membranes for doors and sliding windows
SIGA tape: Airtight window-wall connection, essential for EPB
Elastic sealant: UV-resistant facade sealing for visual finish

When to choose airtight sealing?

New construction with blower door test – airtight connection for EPB

Renovation of faulty installations or aged joints

Sliding windows and low foundations with custom EPDM

Draught and cold bridge problems around windows and doors

Ytong sockets at sliding windows or facade foundations

Visual facade sealing with sleek sealant

Frequently asked questions

Interested in airtight & watertight construction?

Request a free quote, tailored to your needs and budget

Related services

Discover related Noevo specialties

Relacquering

Professional restoration of lacquered surfaces

Bekijk

Film repair

Expert repair of damaged films and coatings