What is the best external wall insulation?
Silicone is the premium, top-notch render choice, the real big hitter for the best external wall insulation system. It’s so popular because it’s breathable, hydrophobic (which means it repels dirt and organic growth) and can be custom mixed to any colour you want.
What is Wetherby render?
The Wetherby silicone and acrylic render systems provide superb quality, ease of application and a superior colour range. The flexible anti-crack formulation and ultra-violet resistant pigments of a silicone or acrylic render allow for large areas to be seamlessly rendered with perfect colour consistency.
Is external wall insulation any good?
Most external wall insulation systems are completely safe, and there is a difference between external cladding and EWI. It’s obviously worthwhile checking you’re using a good installer and decent materials, but the vast majority of manufacturers design their materials to be fire retardant.
What are the problems with external wall insulation?
We have noticed that the biggest problem after installing solid wall insulation is silicone. Where silicone is used around windows or verges, it can degrade quite quickly. Even the best silicone sealant will fail if continually exposed to water, and this can lead to damp problems internally.
How thick should external wall insulation be?
between 50 and 100mm
The thickness of the insulation needs to be between 50 and 100mm and is usually installed where there are severe heating problems or the exterior of the building requires some form of other repair work providing the opportunity of adding insulation.
What is the difference between silicone and acrylic render?
Similar to acrylic render, silicone render is cement-based with silicone mixed in for improved performance. It makes the render more low-maintenance and water-resistant, but unlike acrylic render it doesn’t impair breathability. Unfortunately, this improvement comes at a cost – both to the buyer and the environment.
Is external insulation worth the cost?
Is external wall insulation worth the cost? Considering the impact of cost savings from fuel bills, the value added to your home and the difference it will make to the environment and your carbon footprint, EWI is well worth it. Your house will be more energy efficient, feel warmer and look great!
Will external wall insulation stop Mould?
So does EWI prevent damp? To conclude, external wall insulation is a good preventative measure for condensation and damp ruining the property. If you have guttering problems or rising damp, these can be repaired before or during the installation.
Is silicone render expensive?
Is silicone render expensive? Silicone render is generally slightly more expensive than cement or acrylic options, but it’s much quicker to apply and usually lasts longer without the worry of cracking, scratches and other damage.
Does silicone render crack?
Does silicone render crack? Unlike a layer of paint that will show underneath if it gets cracked, the silicone finish is highly pigmented which means the damage to the top layer is much less obvious. However in our experience silicone render doesn’t crack and on the odd chance that it does, it’s very easy to put right.