Microcement Floors in Portugal: Everything You Need to Know

We apply microcement floors across properties in Porto, Braga, Matosinhos, Guimarães, and the surrounding region. The most common questions we get are about durability (will it crack?), maintenance (how do I clean it?), and whether it can go over existing floor tiles. We'll address all of these here.

What Is Microcement Flooring?

Microcement is a thin-coat, cement-based coating applied in multiple layers (typically 2–4 mm total thickness) over an existing floor or substrate. Unlike tiles, it has no joints or grout lines — it creates a completely seamless surface. Unlike poured concrete, it can be applied in almost any indoor location without structural loading concerns, and it can go directly over existing tiles or concrete without demolition.

The finish is determined by the texture of the product and the topcoat (sealer) applied at the end. Finishes range from ultra-smooth and polished to finely textured and matte. The colour palette spans from pure whites through warm beiges, greys, and terracotta tones to deep charcoals — with custom colours available.

Why Microcement Floors Work Well in Portuguese Homes

Several characteristics make microcement particularly well-suited to renovation in Portugal:

• Applied over existing tiles: most Portuguese apartments have old ceramic floor tiles in reasonable condition. Microcement goes directly over them — no demolition, no dust, no skip-hire. Significant cost and time saving versus tile removal and replacement.
• Thin profile: at 2–4 mm thick, microcement barely raises the floor level — no issues with door height, thresholds, or skirting boards.
• Warm aesthetic: the warm, matte, slightly textured quality of microcement complements Portuguese interiors well — particularly in older buildings with high ceilings and architectural details.
• Continuity through rooms: microcement applied across the whole apartment (hall, living room, kitchen, bedrooms) creates a visual flow that makes the space feel larger and more unified — particularly effective in apartments where many small tile formats previously created a fragmented look.
• Underfloor heating compatible: microcement is an excellent conductor of heat, making it ideal over underfloor heating systems (where they're installed).

The Application Process

A quality microcement floor installation follows these stages:

1. Substrate assessment: the existing floor is inspected for cracks, movement, hollow tiles, and level variation. Any problems are addressed before application begins — microcement will not fix structural issues, it will reveal them.
2. Surface preparation: the existing floor is cleaned, degreased, and any loose tiles or damaged sections are repaired. If applying over tiles, the tile surface may be lightly sanded or etched to improve adhesion.
3. Mesh application: for floors, a fibreglass or reinforcement mesh is often embedded in the first coat to help distribute any minor substrate movement and prevent cracking.
4. Primer: a specialist primer is applied and allowed to cure.
5. Base coat(s): one or two base coats of microcement are applied, trowelled by hand. Each coat is allowed to cure and then sanded smooth before the next is applied.
6. Finish coat: the final microcement coat, thinner and with a finer texture, creates the visual surface. This is the skill-intensive layer — the texture, evenness, and character of the floor is determined here.
7. Sealer: two to three coats of polyurethane sealer (for living areas) or epoxy sealer (for areas requiring higher durability) are applied. The sealer determines gloss level and protects the surface. Allow full cure before use — typically 48–72 hours for foot traffic, 7 days for full hardness.

Can Microcement Go Over Existing Floor Tiles?

Yes — this is one of the most common applications we do in Portuguese properties. The conditions for success:

• Tiles must be well adhered: any hollow tiles (where adhesion has failed) must be refixed or replaced before microcement application. Tap across the surface — hollow tiles produce a dull thud rather than a solid sound.
• Grout lines must be filled: deep grout lines between large tiles can telegraph through microcement if not filled. We apply a levelling or filler coat over grout lines and sand smooth before the main application.
• Level variation: microcement cannot hide significant level differences between tiles or lippage. The substrate must be within 2–3 mm maximum level variation across any 2 m span.
• No expansion joints needed to be covered: existing expansion joints in the substrate must be carried through the microcement — you cannot simply cover them. If an expansion joint is present, there will be a control line in the finished floor.

Durability: How Long Does Microcement Last?

A professionally installed microcement floor with a quality sealer will last 15–25+ years in living areas. The key factors for longevity:

• Quality of sealer: the sealer is what the floor actually sits on — it takes all the wear. A quality polyurethane sealer (2K or water-based 2K) is significantly more durable than a basic single-component sealer. Ask your contractor which sealer system they use.
• Sealer renewal: in high-traffic areas (hallways, kitchen), renewing the sealer every 5–8 years maintains the floor's appearance and protection. This is a straightforward process — light sanding and 2 fresh coats of sealer.
• Proper cleaning: pH-neutral cleaners only. Never use bleach, vinegar, or acid-based floor cleaners — they break down the sealer. Use a damp mop; avoid excessive water pooling.
• Furniture protection: use felt pads on all furniture legs. Dragging furniture across microcement without protection will scratch the sealer.

Microcement Floors vs Tiles: Side by Side

Texture and Finish Options

Microcement floors are available in several texture and finish options. The main categories:

• Fine texture (F1/F2): very smooth, almost polished surface. Most reflective; shows every mark more easily; premium look. Best in low-traffic or bedroom areas.
• Medium texture (M1/M2): the most popular choice for living areas and kitchens. Balanced appearance — sophisticated but practical. Hides minor marks better than fine texture.
• Coarse texture (G1/G2): more rustic, artisan quality. Excellent for heavily textured, tactile finishes. Popular in rural properties and traditional renovation styles.
• Gloss sealer: high-sheen finish; reflects light well; shows marks; easier to clean.
• Matte sealer: most popular in Portugal; warm, natural quality; hides minor marks; easier to live with day-to-day.
• Satin sealer: between matte and gloss; balanced.

Microcement Floors: Our Verdict

For Portuguese apartments being renovated to a contemporary standard, microcement floors are one of the best investments you can make. The ability to apply over existing tiles without demolition saves cost and disruption. The finished result is distinctive and high-value. And in a rental context, a microcement floor apartment photographs significantly better and commands a higher rental rate than an equivalent apartment with old ceramic tiles.

The requirements: professional installation, quality product and sealer, and a commitment to the correct cleaning protocol. Do those three things and your microcement floor will look excellent for decades.

Also read: full microcement cost guide for Portugal, microcement vs polished concrete, and our microcement service page.