Cheap is often expensive: the real impact of DIY sun protection

People searching for “cheap sun protection”, “suction-cup screens”, “keep heat out cheaply” or “best alternative to window film” quickly end up with short-term fixes.
But solar shading is a technical product — effective only when it blocks heat before it reaches the glass.

Indoor or temporary solutions simply cannot achieve this.

They are also extremely wind-sensitive: a screen held only by a few suction cups flaps around, can hit the glass, blow away and cause damage to windows or frames.

Indoors, they barely reduce heat, because the sun has already passed through the glass. The heat still enters the room — indoor shading is decorative, not thermally effective.

Their lifespan is short: frequent reattachment, discolouration and a visually unappealing look.

Professional outdoor roller blinds such as the Harol Coolscreenscollection do work: they stop heat before the glass, are wind-resistant and last for many years.

Sun protection is a precision product exposed to wind, rain and heat.

The 5 biggest risks:

1. Incorrect measurements → product doesn’t fit or runs crooked
2. Incorrect installation → fabric wears out, doesn’t roll properly, cassette isn’t level
3. Damage to façade or window frames
4. Safety risks with electrical connections
5. Warranty becomes invalid (professional installation required)

If you want real comfort, cooling and durability, choose high-quality external blinds. They block heat before it reaches your glass — exactly how solar shading is meant to work.

Cheap alternatives may seem attractive, but rarely deliver the promised results and can even cause damage.

With Harol, you choose Belgian craftsmanship, durable materials, innovative technology and flawless installation.

With its extensive range of outside venetian blinds, screens, awnings and pergolas, Harol has a tailor-made solution for everyone.