{"id":26973,"date":"2026-03-07T09:08:44","date_gmt":"2026-03-07T08:08:44","guid":{"rendered":"https:\/\/marcus.sk\/blog\/?p=26973"},"modified":"2026-05-06T18:25:45","modified_gmt":"2026-05-06T17:25:45","slug":"wall-dehumidification-and-mold-remediation","status":"publish","type":"post","link":"https:\/\/marcus.sk\/blog\/en\/wall-dehumidification-and-mold-remediation\/","title":{"rendered":"Wall dehumidification and mold remediation"},"content":{"rendered":"<h2>\ud83c\udfe0 INTERIOR<\/h2>\n<h3>1. Wall Moisture<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Damp masonry<\/li>\n<li><strong>Solution:<\/strong> Patented capillary waterproofing + multifunctional double render system<\/li>\n<li><strong>Result:<\/strong> Moisture elimination, improvement of thermal insulation properties<\/li>\n<li><strong>Typical objects:<\/strong> Apartments, offices, basements, production halls, warehouses<\/li>\n<\/ul>\n<hr \/>\n<h3>2. Mould and Biological Contamination<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Health-hazardous mould, bacteria, algae, fungi, lichens<\/li>\n<li><strong>Solution:<\/strong> Individually selected KEFA or redstone system (temporary \/ permanent elimination)<\/li>\n<li><strong>Typical objects:<\/strong> Residential spaces, offices, restaurants, kitchens, medical facilities, food industry premises, warehouses, slaughterhouses, breweries, dairies, cold stores, sports halls, paper industry<\/li>\n<\/ul>\n<hr \/>\n<h3>3. Water Vapour Condensation<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Unwanted moisture condensation on surfaces, dripping condensate<\/li>\n<li><strong>Solution:<\/strong> Patented anti-condensation coatings (permanent elimination)<\/li>\n<li><strong>Typical objects:<\/strong> Apartments, schools, water supply systems, production and storage halls, riding arenas, stables, ice rinks and tennis courts, football stadiums, garages, cold stores, station halls, hangars, ships, combat vehicles, ventilation ducts, air conditioning units<\/li>\n<\/ul>\n<hr \/>\n<h3>4. Interior Thermal Insulation<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Facade cannot be insulated from the outside<\/li>\n<li><strong>Solution:<\/strong> Internal retroactive thermal insulation without vapour barrier \u2013 redstone PURA\/CLIMA PLUS system or multifunctional double renders<\/li>\n<li><strong>Typical objects:<\/strong> Historic and listed buildings, buildings with limited facade space, individual wall and ceiling insulation<\/li>\n<\/ul>\n<hr \/>\n<h3>5. Thermal \/ Cold Surface Insulation<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Surfaces of pipes, tanks, ceilings or walls are too hot or too cold<\/li>\n<li><strong>Solution:<\/strong> Microporous system with thermal conductivity coefficient <strong>\u03bb = 0.085 W\/mK<\/strong><\/li>\n<li><strong>Possible substrates:<\/strong> Metals, steel, aluminium, concrete, wood<\/li>\n<\/ul>\n<hr \/>\n<h3>6. Drylining in Wet Rooms<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Rooms with intensive wetting where plasterboard would not withstand<\/li>\n<li><strong>Solution:<\/strong> Universal redstone renovation board (calcium silicate) \u2013 processed exactly the same way as plasterboard<\/li>\n<li><strong>Typical objects:<\/strong> Bathrooms, basements, production and storage rooms<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83c\udfd7\ufe0f EXTERIOR \/ FACADE<\/h2>\n<h3>1. Wall Moisture<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Damp exterior masonry<\/li>\n<li><strong>Solution:<\/strong> Patented capillary waterproofing<\/li>\n<li><strong>Result:<\/strong> Moisture elimination, restoration of thermal insulation properties<\/li>\n<li><strong>Typical objects:<\/strong> Building exterior walls, production halls, warehouses<\/li>\n<\/ul>\n<hr \/>\n<h3>2. Water Vapour Condensation<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Moisture condensation, dripping condensate<\/li>\n<li><strong>Solution:<\/strong> Patented anti-condensation coatings<\/li>\n<li><strong>Typical objects:<\/strong> Riding arenas, stables, ice rinks and tennis courts, football stadiums, garages, cold stores, station halls, hangars and military workshops<\/li>\n<\/ul>\n<hr \/>\n<h3>3. Biological Facade Contamination (Mould, Algae, Lichens)<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Unwanted change in facade colour due to biological contamination<\/li>\n<li><strong>Solution:<\/strong> Microporous KEFATherm Exterieur system \u2013 ensures a permanently dry surface and prevents re-contamination<\/li>\n<li><strong>Typical objects:<\/strong> All facade surfaces<\/li>\n<\/ul>\n<hr \/>\n<h3>4. Multifunctional Renders<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Damp masonry \u2013 need for renovation and insulation<\/li>\n<li><strong>Solution:<\/strong> System of patented multifunctional double renders + waterproofing<\/li>\n<li><strong>Coefficient:<\/strong> \u03bb = 0.09 W\/mK<\/li>\n<li><strong>Result:<\/strong> Elimination of moisture damage, restoration and improvement of thermal insulation properties<\/li>\n<li><strong>Typical objects:<\/strong> All types of mineral masonry<\/li>\n<\/ul>\n<hr \/>\n<h3>5. Thermal Insulation of Damp Facades<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Exterior structure shows moisture + insufficient thermal insulation properties<\/li>\n<li><strong>Solution:<\/strong> Patented thermal insulation system with controlled air gap<\/li>\n<li><strong>Typical objects:<\/strong> All types of damp exterior cladding, including flood-damaged buildings<\/li>\n<\/ul>\n<hr \/>\n<h3>6. Restoration of Facade Thermal Insulation Properties<\/h3>\n<ul>\n<li><strong>Problem:<\/strong> Deteriorated thermal insulation properties of masonry facade due to moisture<\/li>\n<li><strong>Solution:<\/strong> Surface treatment with the product <strong>Lotupor<\/strong> \u2013 physical action that frees the facade from unwanted moisture<\/li>\n<li><strong>Principle:<\/strong> Less moisture \u2192 better thermal insulation properties<\/li>\n<li><strong>Typical objects:<\/strong> All types of masonry facades<\/li>\n<\/ul>\n<hr \/>\n<h3>7. Repair of External Thermal Insulation Composite Systems (ETICS)<\/h3>\n<h4>a) Poor adhesion \/ detachment<\/h4>\n<ul>\n<li><strong>Problem:<\/strong> Thermal insulation system is detaching, risk of collapse<\/li>\n<li><strong>Solution:<\/strong> Patented retroactive fastening system \u2013 permanent fixing of insulation layers, extending service life by decades<\/li>\n<\/ul>\n<h4>b) Insufficient insulation thickness<\/h4>\n<ul>\n<li><strong>Problem:<\/strong> Current polystyrene thickness does not meet thermal-technical requirements<\/li>\n<li><strong>Solution:<\/strong> ETICS revitalisation \u2013 installation of an additional polystyrene layer onto the existing insulation layer<\/li>\n<\/ul>\n<hr \/>\n<h1>Redstone: Individual Solutions for Healthy Homes and Dry Walls<\/h1>\n<blockquote><p><em>We spend 80% of our time indoors. It is time for your home to be truly healthy, dry and comfortable.<\/em><\/p><\/blockquote>\n<hr \/>\n<h2>Why Does the Quality of Your Home Matter?<\/h2>\n<p>Moisture, mould, cold walls, unpleasant indoor air \u2013 these are not just aesthetic problems. A poor indoor climate directly harms your health: it burdens the respiratory system, the immune system and can cause asthma, rheumatism or allergies. It also reduces the value of your property.<\/p>\n<p>The German company <strong>REDSTONE<\/strong> specialises in wall renovation, moisture and mould elimination. Its product lines \u2013 <strong>Clima<\/strong> and <strong>Secco<\/strong> \u2013 offer simple, safe and ecological solutions for both old and new buildings.<\/p>\n<hr \/>\n<h2>The Redstone Philosophy: Simple. Innovative. Safe.<\/h2>\n<table>\n<thead>\n<tr>\n<th>Principle<\/th>\n<th>What this means in practice<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Simple<\/strong><\/td>\n<td>Clear product range, easy application, minimal risk of complaints<\/td>\n<\/tr>\n<tr>\n<td><strong>Innovative<\/strong><\/td>\n<td>Every product is based on an ecological and efficient approach<\/td>\n<\/tr>\n<tr>\n<td><strong>Safe<\/strong><\/td>\n<td>Exclusively health-safe, ecologically sound materials<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>CLIMA LINE \u2013 For a Pleasant and Healthy Indoor Climate<\/h2>\n<p>The Clima line is designed for those who want to improve the indoor climate \u2013 regulate moisture, prevent mould and insulate rooms. It consists of three main products.<\/p>\n<hr \/>\n<h3>1. Clima Redboard\u00ae Pro \u2013 Thin Insulation, Powerful Effect<\/h3>\n<p><strong>What is it?<\/strong> Multifunctional board made of <em>modified calcium silicate<\/em> in an exceptionally high-quality composition. Factory-prepared with a pre-applied primer layer on the inner side.<\/p>\n<p><strong>What can it do?<\/strong><\/p>\n<ul>\n<li>\u2705 Regulates indoor humidity<\/li>\n<li>\u2705 Possesses thermal insulation properties (\u03bb = 0.062 W\/mK)<\/li>\n<li>\u2705 Prevents water vapour condensation<\/li>\n<li>\u2705 Prevents mould growth<\/li>\n<li>\u2705 Capillary-active, diffusion-open construction<\/li>\n<\/ul>\n<p><strong>Energy saving example:<\/strong><\/p>\n<ul>\n<li>Old brick wall 30 cm without insulation: <strong>U = 1.38 m\u00b2K\/W<\/strong><\/li>\n<li>Same wall + Clima Redboard\u00ae Pro 5 cm: <strong>U = 0.65 m\u00b2K\/W<\/strong><\/li>\n<\/ul>\n<p><strong>Installation instructions:<\/strong><\/p>\n<ol>\n<li>\ud83d\udd32 Prepare the substrate \u2013 must be stable, level and clean; prime absorbent surfaces<\/li>\n<li>\u2702\ufe0f Cut boards to size (easy processing with sandpaper)<\/li>\n<li>\ud83e\udea3 Apply system adhesive with a notched trowel<\/li>\n<li>\ud83e\uddf1 Mount boards with light pressure, with offset joints, joints adhesive-free<\/li>\n<li>\ud83d\udd0c Install sockets and cables without cavities, fill with system adhesive<\/li>\n<li>\ud83d\udd8c\ufe0f Apply primer, reinforcement mesh and levelling compound<\/li>\n<\/ol>\n<p><strong>Special formats:<\/strong><\/p>\n<ul>\n<li><em>Wedge board<\/em> \u2013 for compensating thermal bridges at the ceiling\/exterior wall junction<\/li>\n<li><em>Frame board<\/em> (250 \u00d7 500 \u00d7 15 mm) \u2013 for renovation of window sills, windows and doors<\/li>\n<\/ul>\n<hr \/>\n<h3>2. Clima Paramur \u2013 For a Life Free of Mould<\/h3>\n<p><strong>What is it?<\/strong> Capillary-active calcium silicate board with an interconnected network of micropores \u2013 ideal for damp and cold rooms.<\/p>\n<p><strong>What can it do?<\/strong><\/p>\n<ul>\n<li>\u2705 Absorbs moisture for extended periods and then dries out completely<\/li>\n<li>\u2705 Does not dissolve in water \u2013 no wear<\/li>\n<li>\u2705 Prevents mould growth<\/li>\n<li>\u2705 Capillary-active, diffusion-open<\/li>\n<li>\u2705 pH \u2248 10, fire resistance class <strong>A1<\/strong><\/li>\n<\/ul>\n<p><strong>Installation instructions:<\/strong><\/p>\n<ol>\n<li>\ud83d\udd32 Prepare the substrate, use compression strip for separation<\/li>\n<li>\u2702\ufe0f Cut boards to size (protect from dust)<\/li>\n<li>\ud83e\udea3 Apply freshly mixed system adhesive evenly onto the wall surface<\/li>\n<li>\ud83e\uddf1 Mount board with light pressure, butt joints adhesive-free<\/li>\n<li>\ud83d\udd8c\ufe0f Before applying levelling compound, prime the surface with Redstone primer<\/li>\n<\/ol>\n<p><strong>Special formats:<\/strong><\/p>\n<ul>\n<li><em>Wedge board<\/em> \u2013 against thermal bridges (thickness 28 \u2192 5 mm inward)<\/li>\n<li><em>Frame board<\/em> (250 \u00d7 500 \u00d7 15 mm) \u2013 for increasing the surface temperature of window sills<\/li>\n<\/ul>\n<hr \/>\n<h3>3. Clima Fresch \u2013 Ecological Building and Renovation<\/h3>\n<p><strong>What is it?<\/strong> Interior insulation board made of <em>expanded perlite and recycled cellulose<\/em> \u2013 natural materials, excellent insulation properties.<\/p>\n<p><strong>What can it do?<\/strong><\/p>\n<ul>\n<li>\u2705 Protects against cold in winter, against overheating in summer<\/li>\n<li>\u2705 Absorbs moisture and releases it during ventilation<\/li>\n<li>\u2705 Prevents internal condensation<\/li>\n<li>\u2705 Thermal conductivity coefficient: <strong>\u03bb = 0.050 W\/(mK)<\/strong><\/li>\n<li>\u2705 No priming required before application<\/li>\n<\/ul>\n<blockquote><p>\u26a0\ufe0f <em>Note: Clima fresch requires a substrate free of capillary moisture and water ingress.<\/em><\/p><\/blockquote>\n<p><strong>Installation instructions:<\/strong><\/p>\n<ol>\n<li>\ud83d\udd32 Prepare a dry, stable and clean substrate; use compression strip<\/li>\n<li>\u2702\ufe0f Cut boards to size (easy processing, curves are no problem)<\/li>\n<li>\ud83e\udea3 Apply Pura light with a notched trowel<\/li>\n<li>\ud83e\uddf1 Mount boards with light pressure, butt joints adhesive-free<\/li>\n<li>\ud83d\udcaa Reinforce surface with Pura light and reinforcement mesh 110 \u2013 no priming required<\/li>\n<\/ol>\n<p><strong>Special formats:<\/strong><\/p>\n<ul>\n<li><em>Wedge board<\/em> \u2013 for eliminating thermal bridges at the ceiling\/exterior wall junction<\/li>\n<li><em>Frame board<\/em> (380 \u00d7 580 \u00d7 15 mm) \u2013 for renovation of window sills, windows and doors<\/li>\n<\/ul>\n<hr \/>\n<h2>System Components Overview \u2013 Clima Line<\/h2>\n<table>\n<thead>\n<tr>\n<th>Component<\/th>\n<th>Description<\/th>\n<th>Application<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>System adhesive<\/strong><\/td>\n<td>Moisture-regulating thin-bed mortar<\/td>\n<td>Bonding of Redboard\u00ae, Paramur, USP to mineral substrates<\/td>\n<\/tr>\n<tr>\n<td><strong>Special adhesive SB<\/strong><\/td>\n<td>Sulphate-resistant thin-bed mortar<\/td>\n<td>Bonding to gypsum and mineral substrates<\/td>\n<\/tr>\n<tr>\n<td><strong>Filling compound<\/strong><\/td>\n<td>White, diffusion-open filling compound<\/td>\n<td>Filling joints, corners, levelling<\/td>\n<\/tr>\n<tr>\n<td><strong>Pura light<\/strong><\/td>\n<td>Mineral, sulphate-resistant lightweight adhesive<\/td>\n<td>Bonding, reinforcing, levelling for Clima fresch<\/td>\n<\/tr>\n<tr>\n<td><strong>Primer<\/strong><\/td>\n<td>Silicate dispersion \u2013 priming agent<\/td>\n<td>Highly absorbent substrates \u2013 calcium silicate, mineral boards<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>SECCO LINE \u2013 Moisture Remediation: Dry Walls from the Ground Up<\/h2>\n<p>Moisture enters walls in various ways: weathering, leaks, condensation, capillary rise from the ground. The Secco line systematically addresses these problems \u2013 from horizontal barriers to floor sealing.<\/p>\n<hr \/>\n<h3>Where Does Moisture Come From?<\/h3>\n<ul>\n<li>\ud83c\udf27\ufe0f <strong>From outside<\/strong> \u2013 weathering, leaks<\/li>\n<li>\ud83c\udf0a <strong>From below<\/strong> \u2013 capillary rise in structural elements in contact with the ground<\/li>\n<li>\ud83d\udebf <strong>From inside<\/strong> \u2013 showering, cooking, drying laundry + insufficient ventilation<\/li>\n<\/ul>\n<hr \/>\n<h3>Secco Line Products<\/h3>\n<h4>Secco Horizontal Barrier (Cream)<\/h4>\n<p>Manual pressure-free injection with waterproofing based on micro-silicic acid (silanes + siloxanes). <strong>Solvent-free<\/strong>, can be applied to damp masonry. Reliably prevents capillary moisture rise.<\/p>\n<p><strong>Procedure:<\/strong><\/p>\n<ol>\n<li>Mark drill holes (max. 12 cm centre-to-centre spacing)<\/li>\n<li>Drill holes \u2205 12 mm<\/li>\n<li>Inject cream without pressure<\/li>\n<\/ol>\n<hr \/>\n<h4>Secco Horizontal Barrier \u2013 Rods<\/h4>\n<p>A quick and clean alternative to cream. The rods contain hydrophobising silanes and siloxanes \u2013 reduce pore diameter and impart hydrophobic properties to the pore walls.<\/p>\n<p><strong>Procedure:<\/strong><\/p>\n<ol>\n<li>Drill holes \u2205 12 mm<\/li>\n<li>Cut rods to the required length<\/li>\n<li>Insert rods into cleaned holes<\/li>\n<li>Seal with mineral grouting mortar (e.g. Secco Waterproof)<\/li>\n<\/ol>\n<hr \/>\n<h4>Secco Barrier Render<\/h4>\n<p>High-quality mineral grouting mortar \u2013 <strong>waterproof, salt-insensitive<\/strong>. Applied in the same way as traditional render.<\/p>\n<p><strong>Advantages:<\/strong><\/p>\n<ul>\n<li>Can be applied wet and dry<\/li>\n<li>Hybrid primer allows time-independent processing<\/li>\n<li>Resistant to water pressure (several metres of water column)<\/li>\n<\/ul>\n<p><strong>Procedure:<\/strong> Primer FS-Primer \u2192 cove formation \u2192 manual or mechanical application \u2192 sealing \u2192 check minimum thickness of 15 mm<\/p>\n<hr \/>\n<h4>Secco Waterproof<\/h4>\n<p>Thin, high-performance solution \u2013 <strong>waterproofing properties from just 10 mm<\/strong>. Frost-resistant, bonds to damp masonry. Suitable for interior and exterior use.<\/p>\n<hr \/>\n<h4>Secco Due (1K Hybrid Mortar)<\/h4>\n<p>Single-component hybrid mortar \u2013 simple and highly effective for sealing. Depending on the water content, can be used as:<\/p>\n<ul>\n<li>paste mortar<\/li>\n<li>trowel-applied filler compound<\/li>\n<li>grouting paste<\/li>\n<li>cavity filler<\/li>\n<\/ul>\n<p><strong>Ideal for:<\/strong> basements, wet rooms, tanks, concrete and masonry.<\/p>\n<p><strong>Properties:<\/strong> rapid setting, high compressive strength, chemical resistance, salt resistance.<\/p>\n<hr \/>\n<h4>Secco Plinth and Drying Render + Activepor<\/h4>\n<p>Microporous material \u2013 <strong>hydrophobic yet vapour-permeable<\/strong>. Liquid water does not penetrate, water vapour does. Salts do not accumulate in the render \u2192 <strong>no sacrificial render required<\/strong>.<\/p>\n<p><strong>Activepor<\/strong> is a white, long-lasting alternative to renovation renders \u2013 safe, economical, requiring no replacement after years of use.<\/p>\n<p><strong>Procedure:<\/strong> Rough render layer \u2192 primer Secco Primer FS \u2192 manual or mechanical application \u2192 check minimum thickness of 20 mm<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83c\udfe0 INTERIOR 1. Wall Moisture Problem: Damp masonry Solution: Patented capillary waterproofing + multifunctional double render system Result: Moisture elimination, improvement of thermal insulation properties Typical objects: Apartments, offices, basements, &hellip; <\/p>\n","protected":false},"author":1,"featured_media":22064,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[381],"tags":[],"class_list":["post-26973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rough-construction"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Wall dehumidification and mold remediation - Marcus blog<\/title>\n<meta name=\"description\" content=\"wall dehumidification and mold remediation\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/marcus.sk\/blog\/en\/wall-dehumidification-and-mold-remediation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Wall dehumidification and mold remediation - 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