Application & Construction Details: Correct Installation Guide

Insulation construction details - correct installation

Even the most expensive insulation material in the world will fail if installed incorrectly. The success and longevity of thermal insulation is judged exclusively by the construction details.

In this section, we enter the building site. Discover the secrets of correct bonding, learn how to seal sneaky leaks around windows and how to protect the envelope from moisture. A practical guide with quality control checklists to ensure the work meets the highest standards.

Board Installation & Mechanical Fixing

The foundation of every insulation system is its stability. We analyse step by step the correct practices for bonding, fixing and placing insulation boards.

Correct substrate preparation

Never bond to a weak wall. Instructions for cleaning, priming and levelling the surface before the first board.

Bonding methods: Perimeter vs Full-surface

How much adhesive is really needed? When to use the "picture frame" method and when to comb the entire board.

Insulation board installation and mechanical fixing

How many anchors per sq.m.? (Height & wind zone guide)

Mechanical fixing saves the system in extreme weather. How anchor count is determined by building height and region.

How to correctly cut insulation (Hot-wire cutting)

No more polystyrene crumbs and crooked cuts. How hot-wire tools ensure a gap-free fit.

Staggered board placement and corner bonding

The brick rule. Why boards must never align vertically and how correct corner bonding prevents cracks.

Dealing with wall unevenness

What to do when the old wall is "crooked"? Techniques using variable adhesive thickness and sanding for a perfectly level finish.

Waterproofing & Vapour Barriers

Moisture is insulation's number one enemy. We explain how to protect your system from rain, rising damp and - most importantly - the water vapour from inside your home.

What is a vapour barrier and when is it essential?

What the barrier membrane does, which side of the insulation it goes on and why it prevents mould.

Breathable membranes on timber roofs

How "smart" membranes let water vapour out while keeping rainwater out.

Insulation waterproofing and vapour barriers

ETICS base waterproofing: Rising damp

The most sensitive point where the facade meets the ground. Learn about the High Protection (splash) Zone.

Managing interstitial condensation

When moisture gets trapped inside the wall. Analysis of the phenomenon and construction solutions.

Water-repellent finishing renders

The render as the first line of defence. Comparing acrylic, silicone and silicate renders.

Window Connections & Junction Points

About 25% of a building's heat losses occur around windows and doors. See how correct insulation application at these "sensitive" points seals the home and eliminates thermal bridges.

Insulating window reveals (frame casings)

Never leave the window reveal bare. Step-by-step application of thin insulation (e.g. 2-3cm XPS) around the frame.

Placing windows in the insulation plane

The modern trend: how pulling the frame into line with the facade eliminates losses and improves daylighting.

Insulation connection with windows and junction points

Self-expanding tapes (Compriband)

Forget ordinary silicone sealants. Special foam tapes ideally seal the joint between insulation and frame.

Insulating roller shutter boxes

Old shutter boxes let freezing air straight into your living room. Easy solutions and materials.

Integrating downpipes and cables

What to do with pipes and cables running on external walls? Correct embedding practices before the final render.

Quality & Site Control

Leave nothing to chance! Take control of your investment by knowing exactly what to demand from the contractor during works.

Thermal facade checklist

The ultimate homeowner's inspection guide. A checklist covering materials, techniques and details at every project stage.

Material (CE) and system certifications

Don't pay for "unknown origin" systems. How to read ETA certifications and verify material compatibility.

Construction site quality control for insulation

Application conditions: Temperature and humidity

Why we don't insulate in rain, heatwaves or frost. How weather affects adhesives and renders.

Impact resistance (Double mesh reinforcement)

Worried about impacts damaging the insulation? Where and how to apply a reinforced double fibreglass mesh system.

Render cracks: Causes and solutions

The 1/3 rule for mesh placement. Why the render cracks ("spider web") and how a proper base coat prevents it.

Main insulation guide

Return to the complete insulation guide.

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