Double doors and extensions

A double door or a door extension gives a welcome impressive look to your home entrance. A double door makes an ample passage way to your garage or store.

Multifunctional double doors and extension doors

Balcony and terrace double doors allow natural light into the living space. When open, double doors combine living space with the terrace. A double door is also ideal for a warm storehouse or a garage where the wide entrance is a practical solution. A door with an extension is ideal as a front door: the main entrance with an extension opens to form a wide access opening when necessary.

Choose a double door for you garage, store or balcony

Thanks to the double door, you can use your garden store in a more versatile way because moving large objects and furniture, for example, into the store is easy. The double door is also an excellent choice for example, for a carpentry workshop or other hobby space. 

The double door is ideal for a balcony or a terrace when you want to have lots of light in your home. Especially in the warm season, you will have light coming in and a sense of space indoors when you leave open the double doors to the terrace. 

Door with an extension adds an impressive look to your home facade

A front door with an extension is a good choice not only for practicality but also for the impression: the door takes more surface area on the facade, thus making a stronger impact on the look of the facade. It is possible to install an extension as a fixed or an opening one. 

You get Lammin double doors and extensions with the necessary accessories such as fittings, letter slots and peepholes mounted.

Read more about door accessories!

Highest domestic content in the industry

We use high-quality Finnish materials. As an expression of the high degree of domestic content of our products, they are marked with the Key Flag symbol.

The best guarantees

We know that our products last. Therefore, we can grant different warranties for our products depending on the product group. Guarantees are given for both windows and doors.

Complaints percentage almost zero

Our products are only rarely filed for complaints. Most of the complaints involve transportation damage that are covered by the guarantee.


Financing service

If you need funding for your window and/or door purchase, it is easy to apply. Complete the application on our website, and you will get the credit decision immediately.


If necessary, we will come and measure the window and door frames on the spot. This is to ensure that the new windows and doors will fit your home perfectly.

Home delivery

We deliver the windows and doors securely directly to your site within the agreed schedule. We can also help you when you need windows and doors to your site at short notice: you will get stock products from us even in 1-2 days delivery time. 

Order just the kind of door you need

We design and manufacture the right doors just for your home. This means a tailor-made look, excellent weather resistance and the best guarantees in the industry.