What types of products do you supply?

Passive Sills offers a wide range of window sills, oversills and door thresholds to suit most types of construction projects.

Our sister site, www.lightweightmouldings.ie is the leading specialist provider of super lightweight, thermally efficient, and cost-effective mouldings.

Our passive window sills and over sills have excellent insulation values, reducing cold bridging and improving your overall window performance.

Passive Sills insulated door thresholds are manufactured to the clients exact requirements and can be used on most construction types. They eliminate cold bridging at the door threshold as well as floor to ceiling glass systems.

Produced to order and with a range of finishes, the Passive Sills product range provides a one stop solution in the construction or renovation of your home, business or large scale development.

What are Passive Sills window sills, over sills and thresholds  made from?

All our products are made from an ultra high density EPS core with a durable finish to suit a wide variety of building needs. 

Can Passive Sills improve the BER rating of my home in Ireland?

Yes. Our product range offers excellent insulation values, reducing cold bridging and supporting improved BER performance.

In addition, Passive Sills can manufacture bespoke insulated solutions as per architect specifications – please contact our team for more information.

What is the fire rating of the sills?

Passive Sills products are all fire tested to European standard BS EN 13501-1:2007, classification E.

Are Passive Sills’ products certified? 

All Passive Sills products are manufactured to ISO 9001:2015 standards (certification is pending) and we have British Board of Agrément (BBA) certification for a selection of our window sill and oversill products. 

Passive Sills is part of the Environmental Product Declaration (EPD) Programme of Ireland and all Passive Sills products carry a Declaration of Performance (DOP).

View our certifications on our Awards & Certifications page; the product DOPs can be viewed on out Declaration of Performance page.

Where do you ship?

Passive sills is located in Youghal, Co. Cork in the Republic of Ireland we ship nationally, to Northern Ireland, the United Kingdom and across Europe.

What is the cost of shipping?

Shipping rates Shipping rates are subject to your destination. Please note that VAT, customs fees or duties may be payable in the UK and outside the EU. Please see the table below for rates and information.

How long does it take to ship my items?

Passive Sills’ average production turnaround time for orders is 14-21 days. Shipping periods after that are subject to your destination, customs controls and courier services. Passive Sills works with our delivery partners to deliver all orders in a timely manner.

Can I track my order?

Passive Sills does not currently have the ability to track orders once they have been dispatched. We can however assist you with contact information for your courier if required.

What happens in the event of damage?

We advise our customers to contact us immediately once your delivery has arrived if there are signs of damage to your order. We will work with you to establish the cause and rectify appropriately. Every effort will be made to supply goods of sound quality. No subsequent claims for delivery damage or visible marks can be entertained as a result of courier or postal service deliveries.

How do I obtain a quote?

To obtain a quote from our sales team, please contact us by email at info@passivesills.com and provide us with either of the following:

• Window schedule, or,
• A list of finished sill sizes in millimetres (mm). We recommend adding 150mm (75mm each side) to the size of each window opening. This is to facilitate the overhang on each side of the window opening. When contacting us, please let us know if you have accounted for the overhang in your list of measurements.  

Unfortunately we are we are unable to provide you with a quote directly from architect or builder’s plans. 

Alternatively, you can fill out our enquiry form and one of our sales team will contact you directly.

Do you have a sales representative that can call to site?

Our Sales team are based in Ireland and therefore are limited to location visits in our region, to large scale developments only. However, we are happy to assist all customers nationally and internationally via video conferencing, phone, email and messenger services at your convenience.

Do you have a showroom?

We are currently developing a network of showrooms in certain regions. Please check back with us for updates.

Do you have a local distributor near me?

We are currently developing a network of distributors in certain regions. Please check back with us for updates.

After sales service

At Passive Sills we value your custom and are here to assist you throughout the purchase and after sales experience. We value our customer’s opinions and feedback highly.

If you would like to opt in to leave a review or testimonial, or submit some images of your product installed, please contact us.

Please note, opting in to share information implies that information submitted may be used for promotional purposes.

How do I measure for window sills, oversills and door thresholds?

Measuring accurately for your Passive Sills products is important as all products are custom made. For straight lengths, an accurate end to end measurement is sufficient.

For mitred joints for window sills and oversills, each individual length measurement needs to include a surplus for mitring the lengths together on site. In order to measure for a mitred corner, please allow a surplus of the width of the product twice over to accommodate cutting and joining at either end.

What adhesive do I use to install my Passive Sills products?

Passive Sills Low Expansion Foam and Passive Sills Profile Adhesive are the best products to use to install your oversills and door thresholds. Window sills can be installed using mortar.

Can I use mortar?

Yes. For Passive Sills window sills ONLY, mortar is the best option.

Our oversills and thresholds  are designed to be installed using either our Passive Sills Low Expansion Foam or Passive Sills Profile Adhesive.

A bucket of resin came with my order, what is it for?

We provide a small quantity of resin as a courtesy to provide a high-end finish – the resin is used to end and touch up sills and joints once installed.

My extra resin looks dry, has it expired?

No. During storage or transit, resin can settle and dry slightly on the surface. Agitating the mix should re-animate the product. A very small amount of water can also be added to help the process.

Do I need to add on extra when ordering mitring window sills or oversills at a corner? 

Yes. As outlined above, for mitred joints each individual length measurement needs to include a surplus for mitring the lengths together on site. In order to measure for a mitred corner, please allow a surplus of the width of the product twice over to accommodate cutting and joining at either end.

How do you join window sills and oversills at a corner?

Your relevant lengths can be cut easily on site using a wide toothed saw and then fixed in place using our Passive Sills Low Expansion Foam or Passive Sills Profile Adhesive for oversills and using mortar for window sills. 

How do you join window sills and oversills  for extra long lengths?

Again, relevant lengths can be cut easily on site using a wide toothed saw and then fixed in place using our Passive Sills Low Expansion Foam or Passive Sills Profile Adhesive for oversills and using mortar for window sills. 

Can the sills adhere to a variety of surfaces?

Yes. All Passive Sills products can adhere to concrete, engineered timber such as plywood or OSB, finished exterior plaster and render. For oversills and door thresholds, we recommend using our Low Expansion Foam or Adhesive to bond products to the surface. For window sills, we recommend using  mortar.

Will my window sills or oversills fall off?

All Passive Sills products will remain well bonded to surfaces once they have been correctly installed and maintained. Delamination is less likely to occur for Passive Sills than traditional sills  due to the product being more lightweight and not as susceptible to water and frost reactions.

Can I sit or stand on my window sills?

Yes, standard Passive Sills window sills will withstand weights up to 1 quarter tonne per linear metre.

Can I place window boxes on my sills and oversills?

We do not recommend placing window boxes on window sills or oversill and slight discolouration and/or indentation can occur over time.

Are the sills easy to repair?

Yes. Depending on the level of repair required, Passive Sills products are easy to repair using the resin finish you have chosen, or filled with the resin finish and then touched up with your chosen paint colour. If product damage is more substantial than small dents or scrapes, please contact our technical support team for assistance.

What should I do if my order was damaged by the courier?

We advise our customers to contact us immediately once your delivery has arrived if there are signs of damage to your order. We will work with you to establish the cause and rectify appropriately. Every effort will be made to supply goods of sound quality. No subsequent claims for delivery damage or visible marks can be entertained as a result of courier or postal service deliveries.

What do I do if my sills get damaged during or after fitting?

Sometimes damage does occur during installation, though our installation guide will support you throughout the installation process and help mitigate the risks of damage occurring.

If, however, minor damage does occur, Passive Sills products are easy to repair using the resin finish you have chosen, or filled with the resin finish and then touched up with your chosen paint colour. If product damage is more substantial than small dents or scrapes, please contact our technical support team for assistance.

Can I order a sample?

Yes. Samples can be ordered and are subject to the relevant shipping costs and availability.

What colours do Passive Sills window sills and oversills come in?

Our window sills and oversills are available in our hybrid white primed painted finish – lightweight and thermally efficient, the Hybrid sills offers increased durability thanks to our acrylic resin render, which is finished with a spray coating of our Passive Sills custom flexi coat. The hybrid sill does not require any sealant and comes primed in white, which can then be painted on site to your liking.

Our door thresholds are finished with the Passive Sills custom flexi-coat for increased durability and fully waterproof.

Can I paint my sills?

Yes, all window sills and oversills can be painted. Prepare the surface with a water-based primer, or a watered down coat of your paint choice, applied thinly. Follow with a coat of your paint, applied thinly to prevent cracking. Ensure painted finishes are maintained and re-painted when necessary.

What paint should I use?

We recommend a high quality, water based, external paint.

Do I need to use sealant on my sills to keep them protected?

Yes. Our natural stone finishes should be protected regularly using our Passive Sills sealer. Other sealers can contain solvents, which may damage your product.

Do you have a maintenance guide?

Yes. Click the link to view the Passive Sills Maintenance guide.