The effect of spoilers placed on the critical regions of 15 degrees sloped gable roof of a building model on the pressure distributions was experimentally investigated in this study. The values of mean and peak pressure coefficients on the roof of the model placed in simulated atmospheric boundary layer were obtained for a variety of roof-to-spoiler apertures and wind directions. Flow separated from the leading edge of the roof attached on the windward side of the roof and re-separated from the roof ridge. The largest negative pressures on the roof surfaces occurred in the separated flow regions. Spoiler elements placed along the roof edges and roof ridge displayed noteworthy effects in the decreasing of suction loads on roof surfaces. Spoilers located with 1 mm aperture on the roof model decreased the suction loads on those regions up to 50%. It was seen that the spoilers can easily be used to reduce critical suction loads on the roofs as a new novel technique.